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From: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
To: Alia Atlas <akatlas@gmail.com>, "draft-ietf-sfc-control-plane@ietf.org" <draft-ietf-sfc-control-plane@ietf.org>
Thread-Topic: Routing directorate review of draft-ietf-sfc-control-plane-08
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Date: Wed, 1 Mar 2017 16:58:33 +0000
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Subject: [RTG-DIR] Routing directorate review of draft-ietf-sfc-control-plane-08
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From: <mohamed.boucadair@orange.com>
To: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>, Alia Atlas <akatlas@gmail.com>, "draft-ietf-sfc-control-plane@ietf.org" <draft-ietf-sfc-control-plane@ietf.org>
Thread-Topic: Routing directorate review of draft-ietf-sfc-control-plane-08
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Date: Thu, 2 Mar 2017 07:16:06 +0000
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Subject: Re: [RTG-DIR] Routing directorate review of draft-ietf-sfc-control-plane-08
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From: "Papadimitriou, Dimitri (Nokia - BE)" <dimitri.papadimitriou@nokia-bell-labs.com>
To: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "draft-ietf-6man-rfc2460bis.all@ietf.org" <draft-ietf-6man-rfc2460bis.all@ietf.org>
Thread-Topic: Routing directorate review of draft-ietf-6man-rfc2460bis
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Subject: Re: [RTG-DIR] Routing directorate review of draft-ietf-6man-rfc2460bis
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To: "Papadimitriou, Dimitri (Nokia - BE)" <dimitri.papadimitriou@nokia-bell-labs.com>, "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "draft-ietf-6man-rfc2460bis.all@ietf.org" <draft-ietf-6man-rfc2460bis.all@ietf.org>
References: <9C5FD3EFA72E1740A3D41BADDE0B461FC61A4621@szxema506-mbs.china.huawei.com> <84675BAA8C49154AB81E2587BE8BDF833D3556AD@FR711WXCHMBA07.zeu.alcatel-lucent.com> <84675BAA8C49154AB81E2587BE8BDF833D36EDAA@FR711WXCHMBA07.zeu.alcatel-lucent.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Fri, 3 Mar 2017 10:25:03 +1300
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Subject: [RTG-DIR] Hop-by-hop options [Re: Routing directorate review of draft-ietf-6man-rfc2460bis]
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On 03/03/2017 10:02, Papadimitriou, Dimitri (Nokia - BE) wrote:
...
> Section 4.8: states "New hop-by-hop options are not recommended because nodes may be configured to ignore the Hop-by-Hop Option header, drop packets containing a hop-by-hop header" does this configuration change because options are new or old ? there seems to be confusion here between "new vs. existing" options and "intermediate nodes MAY be configured to ignore/drop packets with these options included". 

Middleboxes *might* be configured to do something sensible with existing HbH options (such as ignoring them) and something annoying with unknown new ones (such as kicking them to the slow path or dropping the packet). So yes, the situation is worse for new options than for ones that have been defined years ago. But they are both risky.

   Brian


From nobody Thu Mar  2 13:28:40 2017
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From: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
To: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "rtg-chairs@ietf.org" <rtg-chairs@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
Thread-Topic: PLEASE READ: New routing directorate processes
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Date: Thu, 2 Mar 2017 21:28:32 +0000
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Cc: Min Ye <amy.yemin@huawei.com>
Subject: [RTG-DIR] PLEASE READ: New routing directorate processes
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Dear RTG ADs, RTG chairs and Directorate Members

As many of you will have already noticed, we have recently started to use a=
 new system for managing review assignments in the Routing Area Directorate=
.  This system, which was implemented by Robert Sparks and Tero Kivinen, in=
tegrates your review assignments directly with the IETF datatracker.  It is=
 now being used by many (perhaps all) of the IETF's directorates.

The new system

a)      makes it easier and faster to request reviews of documents

b)      simplifies the communications between the directorate coordinators =
and directorate members

c)      links a draft's datatracker page with the directorate's review(s).

This email sets out the implications for you as ADs, chairs and directorate=
 members.  If you have any questions or comments, please let me know.


If you are an AD
You can request the directorate to review a draft (either at IETF last call=
 or any other time) directly from the draft's page in the datatracker.  If =
the directorate has already reviewed the draft then you will see links to t=
he previous reviews on that page.  Click on the link to "request a review".=
  You will need to select the type of the review (typically "IETF last call=
" or "Early review") and set a deadline.  Submit the request, and then the =
co-ordinators will do the rest.


If you are a WG chair
WG chairs are also free to request a directorate review of any of their WG'=
s drafts, at any time.  Please follow the same procedure as the ADs, above.=
  You should set the review type to "Early review" if the draft is still in=
 the working group (i.e. not already with the IESG).


If you are a member of the directorate
Please see the following web page, where you can manage all of your directo=
rate assignments and preferences.  (You need to be logged into your datatra=
cker account.)
https://datatracker.ietf.org/accounts/review/

This page shows your current assignments as well as your previously complet=
ed assignments.  You can set preferences for how often you want to receive =
assignments, configure periods that you will be unavailable, set up automat=
ic reminders for assignments that you have accepted, etc.  You can also use=
 this page to register an interest in reviewing a particular draft for the =
directorate (although, of course, do feel free to review any draft you like=
 at any time!)

The directorate coordinators will (normally) hand out assignments using a r=
ound robin algorithm, although the tool will help us to take your individua=
l reviewing preferences into account.  When you are given an assignment, yo=
u will receive an email from myself (jonathan.hardwick@metaswitch.com<mailt=
o:jonathan.hardwick@metaswitch.com>) or Amy (amy.yemin@huawei.com<mailto:am=
y.yemin@huawei.com>).  The email will contain a link to the datatracker for=
 your convenience - please click on it and tell us if you will accept the a=
ssignment, or not.  We will try to remind you about your assignment if we d=
on't see a response, but it is better if we don't have to chase.  Please ad=
just your email filters to permit these emails.

When you have completed your assignment, please go to your review page in t=
he datatracker (the above link) and close down the assignment.  You can eit=
her enter a link to an email that you've already sent to the RTG-DIR list, =
or you can paste your review directly into the datatracker.  Whatever works=
 best for you.


Best regards
Jon & Amy


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<p class=3D"MsoNormal">Dear RTG ADs, RTG chairs and Directorate Members<o:p=
></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">As many of you will have already noticed, we have re=
cently started to use a new system for managing review assignments in the R=
outing Area Directorate.&nbsp; This system, which was implemented by Robert=
 Sparks and Tero Kivinen, integrates your
 review assignments directly with the IETF datatracker.&nbsp; It is now bei=
ng used by many (perhaps all) of the IETF&#8217;s directorates.<o:p></o:p><=
/p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The new system<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span style=3D"mso-list:Ignore">a)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>makes it easier and faster to request reviews of do=
cuments<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span style=3D"mso-list:Ignore">b)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>simplifies the communications between the directora=
te coordinators and directorate members<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l0 leve=
l1 lfo1"><![if !supportLists]><span style=3D"mso-list:Ignore">c)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>links a draft&#8217;s datatracker page with the dir=
ectorate&#8217;s review(s).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This email sets out the implications for you as ADs,=
 chairs and directorate members.&nbsp; If you have any questions or comment=
s, please let me know.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><u>If you are an AD<o:p></o:p></u></p>
<p class=3D"MsoNormal">You can request the directorate to review a draft (e=
ither at IETF last call or any other time) directly from the draft&#8217;s =
page in the datatracker.&nbsp; If the directorate has already reviewed the =
draft then you will see links to the previous
 reviews on that page. &nbsp;Click on the link to &#8220;request a review&#=
8221;.&nbsp; You will need to select the type of the review (typically &#82=
20;IETF last call&#8221; or &#8220;Early review&#8221;) and set a deadline.=
&nbsp; Submit the request, and then the co-ordinators will do the rest.<o:p=
></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><u>If you are a WG chair<o:p></o:p></u></p>
<p class=3D"MsoNormal">WG chairs are also free to request a directorate rev=
iew of any of their WG&#8217;s drafts, at any time.&nbsp; Please follow the=
 same procedure as the ADs, above.&nbsp; You should set the review type to =
&#8220;Early review&#8221; if the draft is still in the working
 group (i.e. not already with the IESG).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><u>If you are a member of the directorate<o:p></o:p>=
</u></p>
<p class=3D"MsoNormal">Please see the following web page, where you can man=
age all of your directorate assignments and preferences.&nbsp; (You need to=
 be logged into your datatracker account.)<o:p></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://datatracker.ietf.org/accounts/rev=
iew/">https://datatracker.ietf.org/accounts/review/</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">This page shows your current assignments as well as =
your previously completed assignments.&nbsp; You can set preferences for ho=
w often you want to receive assignments, configure periods that you will be=
 unavailable, set up automatic reminders
 for assignments that you have accepted, etc.&nbsp; You can also use this p=
age to register an interest in reviewing a particular draft for the directo=
rate (although, of course, do feel free to review any draft you like at any=
 time!)<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The directorate coordinators will (normally) hand ou=
t assignments using a round robin algorithm, although the tool will help us=
 to take your individual reviewing preferences into account.&nbsp; When you=
 are given an assignment, you will receive
 an email from myself (<a href=3D"mailto:jonathan.hardwick@metaswitch.com">=
jonathan.hardwick@metaswitch.com</a>) or Amy (<a href=3D"mailto:amy.yemin@h=
uawei.com">amy.yemin@huawei.com</a>).&nbsp; The email will contain a link t=
o the datatracker for your convenience &#8211;
 please click on it and tell us if you will accept the assignment, or not.&=
nbsp; We will try to remind you about your assignment if we don&#8217;t see=
 a response, but it is better if we don&#8217;t have to chase.&nbsp; Please=
 adjust your email filters to permit these emails.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">When you have completed your assignment, please go t=
o your review page in the datatracker (the above link) and close down the a=
ssignment.&nbsp; You can either enter a link to an email that you&#8217;ve =
already sent to the RTG-DIR list, or you can
 paste your review directly into the datatracker.&nbsp; Whatever works best=
 for you.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Best regards<o:p></o:p></p>
<p class=3D"MsoNormal">Jon &amp; Amy<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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From: Tom Herbert <tom@herbertland.com>
Date: Thu, 2 Mar 2017 13:36:36 -0800
Message-ID: <CALx6S35DPToXd1eSXckWDmA1tX-xRy_F_jiOcCV5jQw1vA57pA@mail.gmail.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Cc: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "draft-ietf-6man-rfc2460bis.all@ietf.org" <draft-ietf-6man-rfc2460bis.all@ietf.org>, "Papadimitriou,  Dimitri \(Nokia - BE\)" <dimitri.papadimitriou@nokia-bell-labs.com>, "ipv6@ietf.org" <ipv6@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
Subject: Re: [RTG-DIR] Hop-by-hop options [Re: Routing directorate review of draft-ietf-6man-rfc2460bis]
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On Thu, Mar 2, 2017 at 1:25 PM, Brian E Carpenter
<brian.e.carpenter@gmail.com> wrote:
> On 03/03/2017 10:02, Papadimitriou, Dimitri (Nokia - BE) wrote:
> ...
>> Section 4.8: states "New hop-by-hop options are not recommended because =
nodes may be configured to ignore the Hop-by-Hop Option header, drop packet=
s containing a hop-by-hop header" does this configuration change because op=
tions are new or old ? there seems to be confusion here between "new vs. ex=
isting" options and "intermediate nodes MAY be configured to ignore/drop pa=
ckets with these options included".
>
> Middleboxes *might* be configured to do something sensible with existing =
HbH options (such as ignoring them) and something annoying with unknown new=
 ones (such as kicking them to the slow path or dropping the packet). So ye=
s, the situation is worse for new options than for ones that have been defi=
ned years ago. But they are both risky.
>
Right, but in the current state of things any EH has proven hard to
successfully deploy in practice. IMO it's more of an implementation
problem that needs to be addressed rather than a protocol
specification problem. If the recommendation is to not create new HBH
options because of this it seems like this affirms protocol
ossification and maybe we've lost the battle!

Tom


From nobody Fri Mar  3 08:38:10 2017
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
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Subject: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Shitanshu: 

 

Please address Ron's comment about widely deployed.  I believe this was part
of Alvaro's comments. 

 

Sue 

 

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Hello,

 

The draft is internally consistent. But given what is left out of scope, I
wonder if the new attributes will ever be widely deployed.

 

 
Ron

 

 


This document might benefit from discussion of operational issues. I assume
that when a BGP listener learns a route with the SLA Exchange Attribute, it
provisions class of service forwarding classes on interfaces.

 

##svshah, though this is one desired use of exchanging SLA content, the
draft focuses on transporting SLA content from the SLA Producer to the SLA
Consumer. Processing of the QoS attribute content, at the SLA Consumer, is
outside the scope of this document.

 

##svshah, Let me know if you have a suggestion to make description clearer
in Section 1 and 2 to highlight this.

 

 

I also assume that a) it takes time to provision class of service forwarding
classes and b) the number of forwarding classes that can be provisioned are
finite. What does the BGP listener do when the number of forwarding classes
requested exceeds its capacity to deliver? 

 

##svshah, Since scope of the document is to transport SLA content from the
SLA Producer to the SLA Consumer, the document considers error handling in
the context of transporting data and thus any formating errors and semantics
errors within that context. Any errors in the context of processing QoS
attribute content at the SLA Consumer is outside the scope of the document.

 

 

 


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Shitanshu: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Please address Ron&#8217;s comment about widely deployed.&nbsp; I =
believe this was part of Alvaro&#8217;s comments. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
rtg-dir [mailto:rtg-dir-bounces@ietf.org] <b>On Behalf Of </b>Ron =
Bonica<br><b>Sent:</b> Thursday, February 23, 2017 12:07 =
PM<br><b>To:</b> Shitanshu Shah; rtg-dir@ietf.org; =
draft-ietf-idr-sla-exchange.all@ietf.org; =
idr@ietf.org<br><b>Subject:</b> Re: [RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hello,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The draft is internally consistent. But given what is left out of =
scope, I wonder if the new attributes will ever be widely =
deployed.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><br>This document might benefit from discussion of operational issues. =
I assume that when a BGP listener learns a route with the SLA Exchange =
Attribute, it provisions class of service forwarding classes on =
interfaces.<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><o:p>&nbsp;</o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, though =
this is one desired use of exchanging SLA content, the draft focuses on =
transporting SLA content from the SLA Producer to the SLA Consumer. =
Processing of the QoS attribute content, at the SLA Consumer, is outside =
the scope of this document.<o:p></o:p></span></p><p style=3D'min-height: =
13px'><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'><o:p>&nbsp;</o:p>=
</span></p><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, Let me =
know if you have a suggestion to make description clearer in Section 1 =
and 2 to highlight this.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>I also assume that a) it takes time to provision class of service =
forwarding classes and b) the number of forwarding classes that can be =
provisioned are finite. What does the BGP listener do when the number of =
forwarding classes requested exceeds its capacity to =
deliver?&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><o:p>&nbsp;</o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, Since =
scope of the document is to transport SLA content from the SLA Producer =
to the SLA Consumer, the document considers error handling in the =
context of transporting data and thus any formating errors and semantics =
errors within that context. Any errors in the context of processing QoS =
attribute content at the SLA Consumer is outside the scope of the =
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Andrew and Matthew:=20

=20

Thank you for the review.=20

=20

Sue=20

=20

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Andrew G. =
Malis
Sent: Monday, February 27, 2017 11:43 AM
To: Bocci, Matthew (Nokia - GB)
Cc: rtg-dir@ietf.org; draft-ietf-trill-transport-over-mpls@ietf.org; =
trill@ietf.org
Subject: Re: [RTG-DIR] Routing Area Directorate QA review of =
draft-ietf-trill-transport-over-mpls-02

=20

I=E2=80=99ve got some comments on Matthew=E2=80=99s review, inline.

=20

On Mon, Feb 27, 2017 at 10:44 AM, Bocci, Matthew (Nokia - GB) =
<matthew.bocci@nokia.com> wrote:

Routing Area Directorate QA review of =
draft-ietf-trill-transport-over-mpls-02

=20

Hi,

=20

I have been assigned the QA reviewer for this draft. The general =
guidelines for QA reviews=20

can be found at:

https://trac.ietf.org/trac/rtg/wiki/RtgDirDocQa=20

=20

These state:

=20

  "When reviewing a draft at WG Adoption, the QA Reviewer should

  determine whether the draft is readable, understandable, makes sense

  and is a good start for a WG draft. Any issues the QA Reviewer finds

  are written down, sent to the mailing list and discussed for future

  versions"

=20

Here is my review of this draft:

=20

** Summary.

Generally, the draft is well written - thank you. I have a few minor =
comments below,=20

mostly related to the relationship between TRILL over MPLS and =
established VPLS mechanisms.

=20

** Is the draft readable?

=20

Yes. There are a few minor grammatical errors and it would help if the =
draft was proof-read=20

to weed-out these. An example is:=20

Abstract

"..that are separated by MPLS provider network."

s/by MPLS/by an MPLS

=20

=20

** Is the draft understandable?

=20

Yes, provided the reader is familiar with TRILL, MPLS and VPLS.

=20

** Does it make sense?

I think it is mostly clear, but I have a few comments, as follows:

=20

Section 3.4. MPLS encapsulation for VPLS model

=20

"Use of VPLS [RFC4762] to interconnect TRILL sites requires no changes =
to

a VPLS implementation, in particular the use of Ethernet pseudowires

between VPLS PEs. A VPLS PE receives normal Ethernet frames from an

RBridge (i.e., CE) and is not aware that the CE is an RBridge device. As

a result, an MPLS-encapsulated TRILL packet within the MPLS network will

use the format illustrated in Appendix A of [RFC7173]."

=20

It doesn't look like the encapsulation shown in Appendix A of

RFC7173 takes account of the case where PBB VPLS [RFC7041] is used in =
the provider's=20

MPLS network, but I would have thought this would still be a valid VPLS =
type to transport=20

TRILL. It might be worth qualifying your reference with some text to =
state that=20

this is just an example in the non-PBB case.

=20

Andy: As the author of this paragraph, I agree with Matthew=E2=80=99s =
comment. We can change the last sentence to say:

=20

"As an example, an MPLS-encapsulated TRILL packet within the MPLS =
network will

use the format illustrated in Appendix A of [RFC7173] for the non-PBB =
case, or

in the PBB case, with the additional header fields illustrated in =
[RFC7041]."

=20

=20

Section 4.1.1:

"TIR devices are a superset of the VPLS-PE devices defined in [RFC4026] =
with the=20

additional functionality of TRILL."

Is this really true? Later you state that TIRs use PPP PWs, not the =
Ethernet PWs used in=20

VPLS. It is also not clear if TRILL needs some of the LDP or BGP =
signaling extensions=20

used for VPLS. Wouldn't it be cleaner just to define a TIR as a new kind =
of PE?

=20

Andy: I also agree with this comment.

=20

=20

Section 6. VPTS Model Versus VPLS Model

"An issue with the above rule is that if a pseudowire between PEs fails,

frames will not get forwarded between the PEs where pseudowire went

down."

=20

I think this is only true for a simple full mesh VPLS where there are =
not other protection

mechanisms. I am not sure this is applicable to H-VPLS with PW =
redundancy, for example,=20

which I think is likely to be a widespread deployment case for the VPLS =
model of TRILL=20

over MPLS.

=20

Andy: I agree. In addition, see section 4.4 of RFC 4742, which allows =
the use of spanning tree in a VPLS network to provide redundancy in the =
case of a failure in the VPLS.

=20

=20

=20

 Best regards

 Matthew

=20

Cheers,

Andy

=20

=20


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xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Andrew and Matthew: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you for the review. <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
rtg-dir [mailto:rtg-dir-bounces@ietf.org] <b>On Behalf Of </b>Andrew G. =
Malis<br><b>Sent:</b> Monday, February 27, 2017 11:43 AM<br><b>To:</b> =
Bocci, Matthew (Nokia - GB)<br><b>Cc:</b> rtg-dir@ietf.org; =
draft-ietf-trill-transport-over-mpls@ietf.org; =
trill@ietf.org<br><b>Subject:</b> Re: [RTG-DIR] Routing Area Directorate =
QA review of =
draft-ietf-trill-transport-over-mpls-02<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p =
class=3DMsoNormal>I=E2=80=99ve got some comments on Matthew=E2=80=99s =
review, inline.<o:p></o:p></p><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>On Mon, =
Feb 27, 2017 at 10:44 AM, Bocci, Matthew (Nokia - GB) &lt;<a =
href=3D"mailto:matthew.bocci@nokia.com" =
target=3D"_blank">matthew.bocci@nokia.com</a>&gt; =
wrote:<o:p></o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Routing Area Directorate QA =
review of draft-ietf-trill-transport-over-mpls-02</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Hi,</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>I have been assigned the QA =
reviewer for this draft. The general guidelines for QA reviews =
</span><span lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>can be found at:</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'><a =
href=3D"https://trac.ietf.org/trac/rtg/wiki/RtgDirDocQa" =
target=3D"_blank">https://trac.ietf.org/trac/rtg/wiki/RtgDirDocQa</a> =
</span><span lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>These state:</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp; &quot;When reviewing a =
draft at WG Adoption, the QA Reviewer should</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp; determine whether the =
draft is readable, understandable, makes sense</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp; and is a good start for a =
WG draft. Any issues the QA Reviewer finds</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp; are written down, sent to =
the mailing list and discussed for future</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp; =
versions&quot;</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Here is my review of this =
draft:</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>** Summary.</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Generally, the draft is well =
written - thank you. I have a few minor comments below, </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>mostly related to the =
relationship between TRILL over MPLS and established VPLS =
mechanisms.</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>** Is the draft =
readable?</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Yes. There are a few minor =
grammatical errors and it would help if the draft was proof-read =
</span><span lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>to weed-out these. An example =
is: </span><span lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Abstract</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&quot;..that are separated by =
MPLS provider network.&quot;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>s/by MPLS/by an MPLS</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>** Is the draft =
understandable?</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Yes, provided the reader is =
familiar with TRILL, MPLS and VPLS.</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>** Does it make =
sense?</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>I think it is mostly clear, but =
I have a few comments, as follows:</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Section 3.4. MPLS encapsulation =
for VPLS model</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&quot;Use of VPLS [RFC4762] to =
interconnect TRILL sites requires no changes to</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>a VPLS implementation, in =
particular the use of Ethernet pseudowires</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>between VPLS PEs. A VPLS PE =
receives normal Ethernet frames from an</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>RBridge (i.e., CE) and is not =
aware that the CE is an RBridge device. As</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>a result, an MPLS-encapsulated =
TRILL packet within the MPLS network will</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>use the format illustrated in =
Appendix A of [RFC7173].&quot;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>It doesn't look like the =
encapsulation shown in Appendix A of</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>RFC7173 takes account of the =
case where PBB VPLS [RFC7041] is used in the provider's </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>MPLS network, but I would have =
thought this would still be a valid VPLS type to transport </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>TRILL. It might be worth =
qualifying your reference with some text to state that </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>this is just an example in the =
non-PBB case.</span><span =
lang=3DEN-GB><o:p></o:p></span></p></div></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Andy: As the author of this paragraph, I agree with =
Matthew=E2=80=99s comment. We can change the last sentence to =
say:<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><div><p =
class=3DMsoNormal>&quot;As an example, an MPLS-encapsulated TRILL packet =
within the MPLS network will<o:p></o:p></p></div><div><p =
class=3DMsoNormal>use the format illustrated in Appendix A of [RFC7173] =
for the non-PBB case, or<o:p></o:p></p></div></div><div><p =
class=3DMsoNormal>in the PBB case, with the additional header fields =
illustrated in [RFC7041].&quot;<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Section 4.1.1:</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&quot;TIR devices are a superset =
of the VPLS-PE devices defined in [RFC4026] with the </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>additional functionality of =
TRILL.&quot;</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Is this really true? Later you =
state that TIRs use PPP PWs, not the Ethernet PWs used in </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>VPLS. It is also not clear if =
TRILL needs some of the LDP or BGP signaling extensions </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>used for VPLS. Wouldn't it be =
cleaner just to define a TIR as a new kind of PE?</span><span =
lang=3DEN-GB><o:p></o:p></span></p></div></div></blockquote><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Andy: I also agree with this =
comment.<o:p></o:p></p></div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>Section 6. VPTS Model Versus =
VPLS Model</span><span lang=3DEN-GB><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&quot;An issue with the above =
rule is that if a pseudowire between PEs fails,</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>frames will not get forwarded =
between the PEs where pseudowire went</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>down.&quot;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>I think this is only true for a =
simple full mesh VPLS where there are not other protection</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>mechanisms. I am not sure this =
is applicable to H-VPLS with PW redundancy, for example, </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>which I think is likely to be a =
widespread deployment case for the VPLS model of TRILL </span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>over MPLS.</span><span =
lang=3DEN-GB><o:p></o:p></span></p></div></div></blockquote><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Andy: I agree. In addition, see section 4.4 of RFC =
4742, which allows the use of spanning tree in a VPLS network to provide =
redundancy in the case of a failure in the =
VPLS.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB style=3D'font-size:11.0pt'>&nbsp;Best regards</span><span =
lang=3DEN-GB><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-GB =
style=3D'font-size:11.0pt;color:#888888'>&nbsp;Matthew</span><span =
lang=3DEN-GB =
style=3D'color:#888888'><o:p></o:p></span></p></div></div></blockquote><d=
iv><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Cheers,<o:p></o:p></p></div><div><p =
class=3DMsoNormal>Andy<o:p></o:p></p></div><div><p =
class=3DMsoNormal>&nbsp;<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></div></div></body></html>
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From: Kingston Smiler <kingstonsmiler@gmail.com>
Date: Sun, 5 Mar 2017 00:44:45 +0530
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To: Susan Hares <shares@ndzh.com>
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Cc: "Bocci, Matthew \(Nokia - GB\)" <matthew.bocci@nokia.com>, rtg-dir@ietf.org, draft-ietf-trill-transport-over-mpls@ietf.org, "Andrew G. Malis" <agmalis@gmail.com>, trill@ietf.org
Subject: Re: [RTG-DIR] Routing Area Directorate QA review of draft-ietf-trill-transport-over-mpls-02
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Hi Andrew and Matthew,

Thanks for the review. We are working on the revised draft

Regards,
S. Kingston Smiler.

On Sun, Mar 5, 2017 at 12:35 AM, Susan Hares <shares@ndzh.com> wrote:

> Andrew and Matthew:
>
>
>
> Thank you for the review.
>
>
>
> Sue
>
>
>
> *From:* rtg-dir [mailto:rtg-dir-bounces@ietf.org] *On Behalf Of *Andrew
> G. Malis
> *Sent:* Monday, February 27, 2017 11:43 AM
> *To:* Bocci, Matthew (Nokia - GB)
> *Cc:* rtg-dir@ietf.org; draft-ietf-trill-transport-over-mpls@ietf.org;
> trill@ietf.org
> *Subject:* Re: [RTG-DIR] Routing Area Directorate QA review of
> draft-ietf-trill-transport-over-mpls-02
>
>
>
> I=E2=80=99ve got some comments on Matthew=E2=80=99s review, inline.
>
>
>
> On Mon, Feb 27, 2017 at 10:44 AM, Bocci, Matthew (Nokia - GB) <
> matthew.bocci@nokia.com> wrote:
>
> Routing Area Directorate QA review of draft-ietf-trill-transport-
> over-mpls-02
>
>
>
> Hi,
>
>
>
> I have been assigned the QA reviewer for this draft. The general
> guidelines for QA reviews
>
> can be found at:
>
> https://trac.ietf.org/trac/rtg/wiki/RtgDirDocQa
>
>
>
> These state:
>
>
>
>   "When reviewing a draft at WG Adoption, the QA Reviewer should
>
>   determine whether the draft is readable, understandable, makes sense
>
>   and is a good start for a WG draft. Any issues the QA Reviewer finds
>
>   are written down, sent to the mailing list and discussed for future
>
>   versions"
>
>
>
> Here is my review of this draft:
>
>
>
> ** Summary.
>
> Generally, the draft is well written - thank you. I have a few minor
> comments below,
>
> mostly related to the relationship between TRILL over MPLS and establishe=
d
> VPLS mechanisms.
>
>
>
> ** Is the draft readable?
>
>
>
> Yes. There are a few minor grammatical errors and it would help if the
> draft was proof-read
>
> to weed-out these. An example is:
>
> Abstract
>
> "..that are separated by MPLS provider network."
>
> s/by MPLS/by an MPLS
>
>
>
>
>
> ** Is the draft understandable?
>
>
>
> Yes, provided the reader is familiar with TRILL, MPLS and VPLS.
>
>
>
> ** Does it make sense?
>
> I think it is mostly clear, but I have a few comments, as follows:
>
>
>
> Section 3.4. MPLS encapsulation for VPLS model
>
>
>
> "Use of VPLS [RFC4762] to interconnect TRILL sites requires no changes to
>
> a VPLS implementation, in particular the use of Ethernet pseudowires
>
> between VPLS PEs. A VPLS PE receives normal Ethernet frames from an
>
> RBridge (i.e., CE) and is not aware that the CE is an RBridge device. As
>
> a result, an MPLS-encapsulated TRILL packet within the MPLS network will
>
> use the format illustrated in Appendix A of [RFC7173]."
>
>
>
> It doesn't look like the encapsulation shown in Appendix A of
>
> RFC7173 takes account of the case where PBB VPLS [RFC7041] is used in the
> provider's
>
> MPLS network, but I would have thought this would still be a valid VPLS
> type to transport
>
> TRILL. It might be worth qualifying your reference with some text to stat=
e
> that
>
> this is just an example in the non-PBB case.
>
>
>
> Andy: As the author of this paragraph, I agree with Matthew=E2=80=99s com=
ment. We
> can change the last sentence to say:
>
>
>
> "As an example, an MPLS-encapsulated TRILL packet within the MPLS network
> will
>
> use the format illustrated in Appendix A of [RFC7173] for the non-PBB
> case, or
>
> in the PBB case, with the additional header fields illustrated in
> [RFC7041]."
>
>
>
>
>
> Section 4.1.1:
>
> "TIR devices are a superset of the VPLS-PE devices defined in [RFC4026]
> with the
>
> additional functionality of TRILL."
>
> Is this really true? Later you state that TIRs use PPP PWs, not the
> Ethernet PWs used in
>
> VPLS. It is also not clear if TRILL needs some of the LDP or BGP signalin=
g
> extensions
>
> used for VPLS. Wouldn't it be cleaner just to define a TIR as a new kind
> of PE?
>
>
>
> Andy: I also agree with this comment.
>
>
>
>
>
> Section 6. VPTS Model Versus VPLS Model
>
> "An issue with the above rule is that if a pseudowire between PEs fails,
>
> frames will not get forwarded between the PEs where pseudowire went
>
> down."
>
>
>
> I think this is only true for a simple full mesh VPLS where there are not
> other protection
>
> mechanisms. I am not sure this is applicable to H-VPLS with PW redundancy=
,
> for example,
>
> which I think is likely to be a widespread deployment case for the VPLS
> model of TRILL
>
> over MPLS.
>
>
>
> Andy: I agree. In addition, see section 4.4 of RFC 4742, which allows the
> use of spanning tree in a VPLS network to provide redundancy in the case =
of
> a failure in the VPLS.
>
>
>
>
>
>
>
>  Best regards
>
>  Matthew
>
>
>
> Cheers,
>
> Andy
>
>
>
>
>

--f403045f225ea5aeef0549ec79cb
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<div dir=3D"ltr">Hi Andrew and Matthew,<div><br></div><div>Thanks for the r=
eview. We are working on the revised draft=C2=A0</div><div><br></div><div>R=
egards,</div><div>S. Kingston Smiler.</div></div><div class=3D"gmail_extra"=
><br><div class=3D"gmail_quote">On Sun, Mar 5, 2017 at 12:35 AM, Susan Hare=
s <span dir=3D"ltr">&lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank=
">shares@ndzh.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote=
" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><=
div lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div class=3D"m_-96032824=
3505735260WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">A=
ndrew and Matthew: <u></u><u></u></span></p><p class=3D"MsoNormal"><span st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&qu=
ot;;color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><s=
pan style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-se=
rif&quot;;color:#1f497d">Thank you for the review. <u></u><u></u></span></p=
><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<u></u></sp=
an></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&=
quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d">Sue <u></u><u></u>=
</span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-fami=
ly:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1f497d"><u></u>=C2=A0<=
u></u></span></p><p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;=
font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><spa=
n style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif=
&quot;"> rtg-dir [mailto:<a href=3D"mailto:rtg-dir-bounces@ietf.org" target=
=3D"_blank">rtg-dir-bounces@ietf.<wbr>org</a>] <b>On Behalf Of </b>Andrew G=
. Malis<br><b>Sent:</b> Monday, February 27, 2017 11:43 AM<br><b>To:</b> Bo=
cci, Matthew (Nokia - GB)<br><b>Cc:</b> <a href=3D"mailto:rtg-dir@ietf.org"=
 target=3D"_blank">rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-trill=
-transport-over-mpls@ietf.org" target=3D"_blank">draft-ietf-trill-transport=
-<wbr>over-mpls@ietf.org</a>; <a href=3D"mailto:trill@ietf.org" target=3D"_=
blank">trill@ietf.org</a><br><b>Subject:</b> Re: [RTG-DIR] Routing Area Dir=
ectorate QA review of draft-ietf-trill-transport-<wbr>over-mpls-02<u></u><u=
></u></span></p><div><div class=3D"h5"><p class=3D"MsoNormal"><u></u>=C2=A0=
<u></u></p><div><p class=3D"MsoNormal">I=E2=80=99ve got some comments on Ma=
tthew=E2=80=99s review, inline.<u></u><u></u></p><div><p class=3D"MsoNormal=
"><u></u>=C2=A0<u></u></p><div><p class=3D"MsoNormal">On Mon, Feb 27, 2017 =
at 10:44 AM, Bocci, Matthew (Nokia - GB) &lt;<a href=3D"mailto:matthew.bocc=
i@nokia.com" target=3D"_blank">matthew.bocci@nokia.com</a>&gt; wrote:<u></u=
><u></u></p><div><div><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"=
font-size:11.0pt">Routing Area Directorate QA review of draft-ietf-trill-tr=
ansport-<wbr>over-mpls-02</span><span lang=3D"EN-GB"><u></u><u></u></span><=
/p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=
=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoN=
ormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">Hi,</span><span lang=
=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN=
-GB" style=3D"font-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><u></u><u=
></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-s=
ize:11.0pt">I have been assigned the QA reviewer for this draft. The genera=
l guidelines for QA reviews </span><span lang=3D"EN-GB"><u></u><u></u></spa=
n></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt=
">can be found at:</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p c=
lass=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"><a href=
=3D"https://trac.ietf.org/trac/rtg/wiki/RtgDirDocQa" target=3D"_blank">http=
s://trac.ietf.org/trac/<wbr>rtg/wiki/RtgDirDocQa</a> </span><span lang=3D"E=
N-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" =
style=3D"font-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u>=
</span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:1=
1.0pt">These state:</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0<=
/span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal">=
<span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0 &quot;When reviewing=
 a draft at WG Adoption, the QA Reviewer should</span><span lang=3D"EN-GB">=
<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=
=3D"font-size:11.0pt">=C2=A0 determine whether the draft is readable, under=
standable, makes sense</span><span lang=3D"EN-GB"><u></u><u></u></span></p>=
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=
=A0 and is a good start for a WG draft. Any issues the QA Reviewer finds</s=
pan><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><s=
pan lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0 are written down, sent=
 to the mailing list and discussed for future</span><span lang=3D"EN-GB"><u=
></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D=
"font-size:11.0pt">=C2=A0 versions&quot;</span><span lang=3D"EN-GB"><u></u>=
<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font=
-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p=
 class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">Here i=
s my review of this draft:</span><span lang=3D"EN-GB"><u></u><u></u></span>=
</p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=
=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoN=
ormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">** Summary.</span><s=
pan lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span la=
ng=3D"EN-GB" style=3D"font-size:11.0pt">Generally, the draft is well writte=
n - thank you. I have a few minor comments below, </span><span lang=3D"EN-G=
B"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" sty=
le=3D"font-size:11.0pt">mostly related to the relationship between TRILL ov=
er MPLS and established VPLS mechanisms.</span><span lang=3D"EN-GB"><u></u>=
<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font=
-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p=
 class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">** Is =
the draft readable?</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p =
class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0<=
/span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal">=
<span lang=3D"EN-GB" style=3D"font-size:11.0pt">Yes. There are a few minor =
grammatical errors and it would help if the draft was proof-read </span><sp=
an lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lan=
g=3D"EN-GB" style=3D"font-size:11.0pt">to weed-out these. An example is: </=
span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><=
span lang=3D"EN-GB" style=3D"font-size:11.0pt">Abstract</span><span lang=3D=
"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB=
" style=3D"font-size:11.0pt">&quot;..that are separated by MPLS provider ne=
twork.&quot;</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=
=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">s/by MPLS/by=
 an MPLS</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"Ms=
oNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0</span><span=
 lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><u>=
</u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"=
font-size:11.0pt">** Is the draft understandable?</span><span lang=3D"EN-GB=
"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" styl=
e=3D"font-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></sp=
an></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0p=
t">Yes, provided the reader is familiar with TRILL, MPLS and VPLS.</span><s=
pan lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span la=
ng=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><=
u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=
=3D"font-size:11.0pt">** Does it make sense?</span><span lang=3D"EN-GB"><u>=
</u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"=
font-size:11.0pt">I think it is mostly clear, but I have a few comments, as=
 follows:</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"M=
soNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0</span><spa=
n lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-GB" style=3D"font-size:11.0pt">Section 3.4. MPLS encapsulation for V=
PLS model</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"M=
soNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0</span><spa=
n lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-GB" style=3D"font-size:11.0pt">&quot;Use of VPLS [RFC4762] to interc=
onnect TRILL sites requires no changes to</span><span lang=3D"EN-GB"><u></u=
><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"fon=
t-size:11.0pt">a VPLS implementation, in particular the use of Ethernet pse=
udowires</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"Ms=
oNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">between VPLS PEs. =
A VPLS PE receives normal Ethernet frames from an</span><span lang=3D"EN-GB=
"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" styl=
e=3D"font-size:11.0pt">RBridge (i.e., CE) and is not aware that the CE is a=
n RBridge device. As</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p=
 class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">a resu=
lt, an MPLS-encapsulated TRILL packet within the MPLS network will</span><s=
pan lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span la=
ng=3D"EN-GB" style=3D"font-size:11.0pt">use the format illustrated in Appen=
dix A of [RFC7173].&quot;</span><span lang=3D"EN-GB"><u></u><u></u></span><=
/p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=
=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoN=
ormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">It doesn&#39;t look =
like the encapsulation shown in Appendix A of</span><span lang=3D"EN-GB"><u=
></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D=
"font-size:11.0pt">RFC7173 takes account of the case where PBB VPLS [RFC704=
1] is used in the provider&#39;s </span><span lang=3D"EN-GB"><u></u><u></u>=
</span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:1=
1.0pt">MPLS network, but I would have thought this would still be a valid V=
PLS type to transport </span><span lang=3D"EN-GB"><u></u><u></u></span></p>=
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">TRIL=
L. It might be worth qualifying your reference with some text to state that=
 </span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal=
"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">this is just an example i=
n the non-PBB case.</span><span lang=3D"EN-GB"><u></u><u></u></span></p></d=
iv></div><div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div><div><p =
class=3D"MsoNormal">Andy: As the author of this paragraph, I agree with Mat=
thew=E2=80=99s comment. We can change the last sentence to say:<u></u><u></=
u></p></div><div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div><div>=
<div><p class=3D"MsoNormal">&quot;As an example, an MPLS-encapsulated TRILL=
 packet within the MPLS network will<u></u><u></u></p></div><div><p class=
=3D"MsoNormal">use the format illustrated in Appendix A of [RFC7173] for th=
e non-PBB case, or<u></u><u></u></p></div></div><div><p class=3D"MsoNormal"=
>in the PBB case, with the additional header fields illustrated in [RFC7041=
].&quot;<u></u><u></u></p></div><div><p class=3D"MsoNormal"><u></u>=C2=A0<u=
></u></p></div><blockquote style=3D"border:none;border-left:solid #cccccc 1=
.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><div><di=
v><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=
=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoN=
ormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">Section 4.1.1:</span=
><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span=
 lang=3D"EN-GB" style=3D"font-size:11.0pt">&quot;TIR devices are a superset=
 of the VPLS-PE devices defined in [RFC4026] with the </span><span lang=3D"=
EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB"=
 style=3D"font-size:11.0pt">additional functionality of TRILL.&quot;</span>=
<span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span =
lang=3D"EN-GB" style=3D"font-size:11.0pt">Is this really true? Later you st=
ate that TIRs use PPP PWs, not the Ethernet PWs used in </span><span lang=
=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN=
-GB" style=3D"font-size:11.0pt">VPLS. It is also not clear if TRILL needs s=
ome of the LDP or BGP signaling extensions </span><span lang=3D"EN-GB"><u><=
/u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"f=
ont-size:11.0pt">used for VPLS. Wouldn&#39;t it be cleaner just to define a=
 TIR as a new kind of PE?</span><span lang=3D"EN-GB"><u></u><u></u></span><=
/p></div></div></blockquote><div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u=
></p></div><div><p class=3D"MsoNormal">Andy: I also agree with this comment=
.<u></u><u></u></p></div><div><p class=3D"MsoNormal">=C2=A0<u></u><u></u></=
p></div><blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;pa=
dding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><div><div><p cl=
ass=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0</s=
pan><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><s=
pan lang=3D"EN-GB" style=3D"font-size:11.0pt">Section 6. VPTS Model Versus =
VPLS Model</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"=
MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">&quot;An issue w=
ith the above rule is that if a pseudowire between PEs fails,</span><span l=
ang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D=
"EN-GB" style=3D"font-size:11.0pt">frames will not get forwarded between th=
e PEs where pseudowire went</span><span lang=3D"EN-GB"><u></u><u></u></span=
></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt"=
>down.&quot;</span><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=
=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt">=C2=A0</span=
><span lang=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span=
 lang=3D"EN-GB" style=3D"font-size:11.0pt">I think this is only true for a =
simple full mesh VPLS where there are not other protection</span><span lang=
=3D"EN-GB"><u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN=
-GB" style=3D"font-size:11.0pt">mechanisms. I am not sure this is applicabl=
e to H-VPLS with PW redundancy, for example, </span><span lang=3D"EN-GB"><u=
></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D=
"font-size:11.0pt">which I think is likely to be a widespread deployment ca=
se for the VPLS model of TRILL </span><span lang=3D"EN-GB"><u></u><u></u></=
span></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.=
0pt">over MPLS.</span><span lang=3D"EN-GB"><u></u><u></u></span></p></div><=
/div></blockquote><div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div=
><div><p class=3D"MsoNormal">Andy: I agree. In addition, see section 4.4 of=
 RFC 4742, which allows the use of spanning tree in a VPLS network to provi=
de redundancy in the case of a failure in the VPLS.<u></u><u></u></p></div>=
<div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div><div><p class=3D"=
MsoNormal"><u></u>=C2=A0<u></u></p></div><blockquote style=3D"border:none;b=
order-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;=
margin-right:0in"><div><div><p class=3D"MsoNormal"><span lang=3D"EN-GB" sty=
le=3D"font-size:11.0pt">=C2=A0</span><span lang=3D"EN-GB"><u></u><u></u></s=
pan></p><p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0=
pt">=C2=A0Best regards</span><span lang=3D"EN-GB"><u></u><u></u></span></p>=
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:11.0pt;color=
:#888888">=C2=A0Matthew</span><span lang=3D"EN-GB" style=3D"color:#888888">=
<u></u><u></u></span></p></div></div></blockquote><div><p class=3D"MsoNorma=
l"><u></u>=C2=A0<u></u></p></div><div><p class=3D"MsoNormal">Cheers,<u></u>=
<u></u></p></div><div><p class=3D"MsoNormal">Andy<u></u><u></u></p></div><d=
iv><p class=3D"MsoNormal">=C2=A0<u></u><u></u></p></div></div><p class=3D"M=
soNormal"><u></u>=C2=A0<u></u></p></div></div></div></div></div></div></blo=
ckquote></div><br></div>

--f403045f225ea5aeef0549ec79cb--


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From: Dan Frost <frost@mm.st>
To: draft-bchv-rfc6890bis@ietf.org, rtg-ads@ietf.org
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Subject: [RTG-DIR] RtgDir review: draft-bchv-rfc6890bis-04
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Hello,

I have been selected as the Routing Directorate reviewer for this draft.
 The Routing Directorate seeks to review all routing or routing-related 
drafts as they pass through IETF last call and IESG review, and 
sometimes on special request. The purpose of the review is to provide 
assistance to the Routing ADs. For more information about the Routing 
Directorate, please see
http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it
 would be helpful if you could consider them along with any other IETF 
Last Call comments that you receive, and strive to resolve them through 
discussion or by updating the draft.

Document:  draft-bchv-rfc6890bis-04
 Reviewer: Dan Frost
 Review Date: 2017-03-06
 IETF LC End Date: 2017-03-10
 Intended Status: Best Current Practices


Summary:

I have some minor concerns about this document that I think should be
resolved before publication.

Comments:

This draft aims to update the guidelines governing special-purpose IPv4
and IPv6 address block registrations (things like link-local, localhost,
and RFC1918 private-addressing) provided by RFC 6890.

Overall the draft is in good shape and the content is clear. However,
there are some structural issues that, while not critical, would make
the document easier to understand if addressed.

Major Issues:

No major issues found.

Minor Issues:

The main issue I found when reading the document is that it's not
obvious whether this is intended to be read as a patch on top of RFC
6890 or as a replacement for it. Since it proposes to obsolete RFC 6890,
presumably it's the latter. But in some ways it reads more like a patch.

More specifically, the abstract and introductory text focuses more on
the patch aspect (the clarification of the "global" field), and in so
doing, drops the overall context and v4/v6 balance of RFC 6890. The
abstract, for instance, only mentions v6.

If the authors do intend for this draft to replace RFC 6890, I think it
would substantially improve readability to frame this document first and
foremost as a complete reference on special-purpose address block
registration, and to single out the "global" clarification issue in its
own section.

Moreover, the manner in which this draft addresses the "global" issue is
also not obvious. Specifically, it doesn't explicitly call out  the
precise changes it makes over RFC 6890. The introduction states that it
"augments the fields contained within the registries in order to address
the confusion raised by the definition of "global"." What does this mean
exactly? As far as I can tell, the only change it makes is renaming the
field from "Global" to "Globally Reachable".

In sum, my recommendation would be to (1) frame the document as a
reference on special-purpose registration generally; (2) detail the
"global" issue in its own section; and (3) be explicit in that section
about the changes made over RFC 6890 and how they resolve the issue.

Nits:

The IPv6 Special-Purpose Address Registry URL listed at the beginning of
Section 3.2 has a typo("www,iana.org" with a comma after the www).

Cheers,
-d


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From: Shitanshu Shah <shitanshu_shah@hotmail.com>
To: Susan Hares <shares@ndzh.com>, 'Ron Bonica' <rbonica@juniper.net>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Hi Sue,


Following is what I had responded to Ron. Hopefully that addresses/clarifie=
s.


To break it down in two point response,


1) This draft is not changing how SLA is established at first place. The dr=
aft is providing a method to convey this a priori established SLA to help r=
educe lot of manual complexities and errors to admin. Thus given a knowledg=
e of what SLA is established, in general devices should be capable to suppo=
rt that established SLA.



2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or of temporary nature =
where for example enough resources not available at any specific point of a=
 time.


We feel that in current state of the draft, it can be largely useful in dep=
loyments.




One can imagine though even establishment of SLA also can be done via excha=
nging it over bgp. However, negotiation of SLA does not have to be clubbed =
with exchange of SLA. Negotiation of SLA is not in this scope.


Regards,
Shitanshu


________________________________
From: Susan Hares <shares@ndzh.com>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org; draft-ietf-idr-sla-ex=
change.all@ietf.org; idr@ietf.org
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Shitanshu:

Please address Ron=92s comment about widely deployed.  I believe this was p=
art of Alvaro=92s comments.

Sue

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.=
org; idr@ietf.org
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hello,

The draft is internally consistent. But given what is left out of scope, I =
wonder if the new attributes will ever be widely deployed.

                                                                           =
     Ron



This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.


##svshah, though this is one desired use of exchanging SLA content, the dra=
ft focuses on transporting SLA content from the SLA Producer to the SLA Con=
sumer. Processing of the QoS attribute content, at the SLA Consumer, is out=
side the scope of this document.



##svshah, Let me know if you have a suggestion to make description clearer =
in Section 1 and 2 to highlight this.


I also assume that a) it takes time to provision class of service forwardin=
g classes and b) the number of forwarding classes that can be provisioned a=
re finite. What does the BGP listener do when the number of forwarding clas=
ses requested exceeds its capacity to deliver?


##svshah, Since scope of the document is to transport SLA content from the =
SLA Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and semantic=
s errors within that context. Any errors in the context of processing QoS a=
ttribute content at the SLA Consumer is outside the scope of the document.





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Content-Type: text/html; charset="Windows-1252"
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<style type=3D"text/css" style=3D"display:none;"><!-- P {margin-top:0;margi=
n-bottom:0;} --></style>
</head>
<body dir=3D"ltr">
<div id=3D"divtagdefaultwrapper" style=3D"font-size:12pt;color:#000000;font=
-family:Calibri,Arial,Helvetica,sans-serif;" dir=3D"ltr">
<p>Hi Sue,</p>
<p><br>
</p>
<p>Following is what I had responded to Ron. Hopefully&nbsp;that addresses/=
clarifies.</p>
<p><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;">To break i=
t down in two point response,</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;">1) This dr=
aft is not changing how SLA is established at first place. The draft&nbsp;i=
s providing a method to convey this a priori established&nbsp;SLA to help r=
educe lot of manual complexities and errors
 to admin. Thus given a knowledge of what SLA is established, in general de=
vices should be capable to support that established&nbsp;SLA.</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;">2) If ther=
e still are any issues in implementing exchanged SLA in forwarding, we thin=
k they either are implementation specific or&nbsp;of temporary nature where=
 for example enough resources not available
 at any specific point of a time.</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;">We feel th=
at in current state of the draft, it can be largely useful in deployments.<=
/p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;">One can im=
agine though even establishment of SLA also can&nbsp;be done via exchanging=
 it over bgp. However, negotiation of SLA does not have to be clubbed with =
exchange of SLA. Negotiation of SLA is
 not in this scope.</p>
<p style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;"><br>
</p>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;">Regards,=
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif;">Shitansh=
u</div>
<br>
<br>
<div style=3D"color: rgb(0, 0, 0);">
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Susan Hares &lt;share=
s@ndzh.com&gt;<br>
<b>Sent:</b> Saturday, March 4, 2017 8:31 AM<br>
<b>To:</b> 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org; draft-ietf-idr=
-sla-exchange.all@ietf.org; idr@ietf.org<br>
<b>Subject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</font>
<div>&nbsp;</div>
</div>
<div>
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Shitanshu:
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Please address Ron=92s =
comment about widely deployed.&nbsp; I believe this was part of Alvaro=92s =
comments.
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Sue
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<div>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt; font-family:&quo=
t;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-=
size:10.0pt; font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> rtg-di=
r [mailto:rtg-dir-bounces@ietf.org]
<b>On Behalf Of </b>Ron Bonica<br>
<b>Sent:</b> Thursday, February 23, 2017 12:07 PM<br>
<b>To:</b> Shitanshu Shah; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.al=
l@ietf.org; idr@ietf.org<br>
<b>Subject:</b> Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">Hello,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">The draft is internally=
 consistent. But given what is left out of scope, I wonder if the new attri=
butes will ever be widely deployed.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
; Ron</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black"><br>
This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.</span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black">&nbsp;</span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt; font-family:Menlo; color:black">##svshah=
, though this is one desired use of exchanging SLA content, the draft focus=
es on transporting SLA content from the SLA Producer to the SLA Consumer. P=
rocessing of the QoS attribute content,
 at the SLA Consumer, is outside the scope of this document.</span></p>
<p style=3D"min-height:13px"><span style=3D"font-size:8.5pt; font-family:Me=
nlo; color:black">&nbsp;</span></p>
<p><span style=3D"font-size:8.5pt; font-family:Menlo; color:black">##svshah=
, Let me know if you have a suggestion to make description clearer in Secti=
on 1 and 2 to highlight this.</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black">&nbsp;</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black">&nbsp;</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black">I also assume that a) it =
takes time to provision class of service forwarding classes and b) the numb=
er of forwarding classes that can be provisioned are finite.
 What does the BGP listener do when the number of forwarding classes reques=
ted exceeds its capacity to deliver?&nbsp;</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black">&nbsp;</span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt; font-family:Menlo; color:black">##svshah=
, Since scope of the document is to transport SLA content from the SLA Prod=
ucer to the SLA Consumer, the document considers error handling in the cont=
ext of transporting data and thus
 any formating errors and semantics errors within that context. Any errors =
in the context of processing QoS attribute content at the SLA Consumer is o=
utside the scope of the document.</span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-size:8.5pt; font-fami=
ly:Menlo; color:black">&nbsp;</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black">&nbsp;</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt; font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;; color:black">&nbsp;</span></p>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From nobody Mon Mar  6 08:25:38 2017
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Reviewer: Susan Hares
Review result: Has Issues

The RTG-DIR has the categories:  minor concerns or major concerns
regarding "issues", I wil differentiate my issues by this quality. 
I also have editorial nits regardign under specified text. 

Major concerns: 
1) The security section is not sufficient for any review by the
Security area 

This draft depends on IDR WG draft (ietf-idr-bgp-prefix-sid) that
defines the BGP Segment attribute.  If this attribute is used with
IPv6, this simply gives more infromation about a link to a next. 
However, the combination of this information with the information
passed using draft-ietf-idr-bgpls-segment-routing-epe-09 that utilizes
BGP to pass BGP topologies in BGP - requires a better security
section.  BGP-LS was described to be an "information gathering"
function handled by a few routers on the edge of the network to obtain
link-state topology information.  The BGP peers would carry this
information in a separate informational stream.  With this constraint,
it was approved by the IESG.   
draft-ietf-idr-bgpls-segment-routing-epe  expands the initial concept
of BGP-LS from "information gathering" to a full-routing scheme of BGP
within BGP for data centers and for data center interconnection to the
network.   This extension takes it out of the approved range of the
BGP-LS.  Therefore, the security sections in both the IDR WG drafts
and this draft need to describe the new threat scenarios and describe
threat mitigation strategies for deployments.  

In addition, the information by BGP-LS
(draft-ietf-idr-bgpls-segment-routing-epe) or in draft-ietf-bgp-sid
may have privacy issues - so these need to be described the security
section. 

2) through-out the text you use words such as "ebgp3107" or BGP 3107
updates"

This phrase is inaccurate.  The base RFC3107 support will not provide
BGP-Prefix support (as supported in bgp-idr-bgp-prefix.   Some texts
goes on to clarify the addition of the BGP SID Prefix attribute.  It
would be better to invent a new phrase or term.  

In section 8.1, the authors state:
"The Prefix Segement is a lightweight extension to the BGP Labelled
Unicast".  As noted in my #1 major concern, this "hand-waving"
description either needs to be refined to be accurate.  If the MPLS
usage only uses the BGP-Prefix label and does not extend to the
Egress, it is simplier.  However, it is not clear that is what section
8.1 is about.   If 8.1 includes the
draft-ietf-idr-bgpls-segment-routing-epe, then BGP-LS addition does
have a number of prefixes and rules.   The trade-off between BGP-LS +
BGP-LS SID (draft-ietf-idr-bgp-sid) handling + BGP LS egress peer
engineering draft (draft-ietf-idr-bgp-segment-routing-epe) and a
signalling protocol is more complex than the hand-wave.  It may be the
right choice based on current implementations and management issues,
but these need to be laid specifically. 

3) Why are you defining 2-byte Private Use AS when there are plenty of
4-Byte Private Use AS (p. 5). 

This usage increases the confusion regarding 2-byte/4-byte ASN.  IDR
specifically worked on 4 byte ASN. 

Minor concerns  
1) It is not clear what happens in section 4.2.2 and figure 3-5

What happens if the traffic goes to node 3 instead of node 4 on the
ECMP path? 
What happens if the traffic goes to node 8 instead of node 7 on the
ECMP Path? 

Is there something missing in the stroy? 

2) section 4.3 - IBGP Labeled Unicast. 

The phrase "iBGP3107 reflection with nhop-self" needs to be explicitly
spelled out as IBGP Route-Reflection with next-hop self.  If that is
not what the authors mean, then it needs to be further spelled out. 
It is unclear where the central IBGP nodes are that share fully the
information learned from the three clusters. (nodes:5-8 cluster 1,
nodes 3-4 cluster 2, nodes 9-10 cluster 3).  

This section has hints of a solution, but it is miss a great deal. 
Please upgrade to specific solution.  A diagram might help. 

3) Load Sharing hints (Section 7.1) 

Elephant flow and mice flows are good descriptions.  Flowlets and VL2
should either warrant a 1 sentence explanation that actually describes
these features in a 22 page draft, or be removed.  

4)  The lack of a manageability or operations section (TBD in version
-02) - concerns me.  The operational issues may be well known to the
data centers and devices manufacturers who have implement this
specification, but this is an interoperability specification for IETF.
 Some manageabilty comments should be included or a BCP pointed to. 

Editorial issues: 

#1 - The following 4 abbrevitions need to be initially expanded when
first used:  CLOs (p.3),  SRGB(p.6), flowlets (p. 14), and VL2 (p.
14). 

#2 - page 7, section 4.2 last paragraph 
Old/: assuming the IP Addresses, AS and label-index allocation
previously described, the"
New/: assuming the IP address with the AS and label-index allocation
previously described, the" 
[Comma is optional]

#3 - page 14, section 7.1 paragraph 4,  /(e.g. spine switch Node1)/  -
by the diagram it should be node 5-8 or an error.  Please check the
number 

#4 - page 17, section 8.2 paragraph 2. 

Old/
This is easily accomplished by encapsulating the trafffic either 
directly at the host or the source ToR node by pushing the BGP-
Prefix-SID of the destination ToR for intra-DC traffic, or border 
node for inter-DC or DC-to-outside-world traffic./

New/
This is easily accomplished by encapsulating the trafffic either 
directly at the host or the source ToR node  by pushing  the BGP-
Prefix-SID of the destination ToR for intra-DC traffic, or
the BGP-Prefix-SID for the the border node for inter-DC or
DC-to-outside-world traffic./
 
If this is not the correct logic, then you can reword this further. 
I read it 4 or 5 times. 

#5 - Adding a diagram to section 4.3 might help your description. 



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From: "Susan Hares" <shares@ndzh.com>
To: "'Shitanshu Shah'" <shitanshu_shah@hotmail.com>, "'Ron Bonica'" <rbonica@juniper.net>, <rtg-dir@ietf.org>, <draft-ietf-idr-sla-exchange.all@ietf.org>, <idr@ietf.org>
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Shitanshu: 

 

Ron is discussing your point #2 - you need to engage him on issue #2.    You
can provide input from operators who indicate this is necessary, but it is
important to have this discussion.  Alvaro was concerned about the
deployments of these attributes. 

 

Sue 

 

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com] 
Sent: Monday, March 6, 2017 10:31 AM
To: Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Hi Sue,

 

Following is what I had responded to Ron. Hopefully that
addresses/clarifies.

 

To break it down in two point response,

 

1) This draft is not changing how SLA is established at first place. The
draft is providing a method to convey this a priori established SLA to help
reduce lot of manual complexities and errors to admin. Thus given a
knowledge of what SLA is established, in general devices should be capable
to support that established SLA.

 

 

2) If there still are any issues in implementing exchanged SLA in
forwarding, we think they either are implementation specific or of temporary
nature where for example enough resources not available at any specific
point of a time.

 

We feel that in current state of the draft, it can be largely useful in
deployments.

 

 

 

One can imagine though even establishment of SLA also can be done via
exchanging it over bgp. However, negotiation of SLA does not have to be
clubbed with exchange of SLA. Negotiation of SLA is not in this scope.

 

Regards,

Shitanshu

 

  _____  

From: Susan Hares <shares@ndzh.com>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10 

 

Shitanshu: 

 

Please address Ron's comment about widely deployed.  I believe this was part
of Alvaro's comments. 

 

Sue 

 

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Hello,

 

The draft is internally consistent. But given what is left out of scope, I
wonder if the new attributes will ever be widely deployed.

 

 
Ron

 

 


This document might benefit from discussion of operational issues. I assume
that when a BGP listener learns a route with the SLA Exchange Attribute, it
provisions class of service forwarding classes on interfaces.

 

##svshah, though this is one desired use of exchanging SLA content, the
draft focuses on transporting SLA content from the SLA Producer to the SLA
Consumer. Processing of the QoS attribute content, at the SLA Consumer, is
outside the scope of this document.

 

##svshah, Let me know if you have a suggestion to make description clearer
in Section 1 and 2 to highlight this.

 

 

I also assume that a) it takes time to provision class of service forwarding
classes and b) the number of forwarding classes that can be provisioned are
finite. What does the BGP listener do when the number of forwarding classes
requested exceeds its capacity to deliver? 

 

##svshah, Since scope of the document is to transport SLA content from the
SLA Producer to the SLA Consumer, the document considers error handling in
the context of transporting data and thus any formating errors and semantics
errors within that context. Any errors in the context of processing QoS
attribute content at the SLA Consumer is outside the scope of the document.

 

 

 


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Shitanshu: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Ron is discussing your point #2 &#8211; you need to engage him on =
issue #2.&nbsp; &nbsp;&nbsp;You can provide input from operators who =
indicate this is necessary, but it is important to have this =
discussion.&nbsp; Alvaro was concerned about the deployments of these =
attributes. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Shitanshu Shah [mailto:shitanshu_shah@hotmail.com] <br><b>Sent:</b> =
Monday, March 6, 2017 10:31 AM<br><b>To:</b> Susan Hares; 'Ron Bonica'; =
rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; =
idr@ietf.org<br><b>Subject:</b> Re: [RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div =
id=3Ddivtagdefaultwrapper><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Hi =
Sue,<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Following is =
what I had responded to Ron. Hopefully&nbsp;that =
addresses/clarifies.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>To break it =
down in two point response,<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>1) This draft =
is not changing how SLA is established at first place. The draft&nbsp;is =
providing a method to convey this a priori established&nbsp;SLA to help =
reduce lot of manual complexities and errors to admin. Thus given a =
knowledge of what SLA is established, in general devices should be =
capable to support that =
established&nbsp;SLA.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>2) If there =
still are any issues in implementing exchanged SLA in forwarding, we =
think they either are implementation specific or&nbsp;of temporary =
nature where for example enough resources not available at any specific =
point of a time.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>We feel that in =
current state of the draft, it can be largely useful in =
deployments.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>One can imagine =
though even establishment of SLA also can&nbsp;be done via exchanging it =
over bgp. However, negotiation of SLA does not have to be clubbed with =
exchange of SLA. Negotiation of SLA is not in this =
scope.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Regards,<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Shitanshu<o:p></=
o:p></span></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><div><div class=3DMsoNormal align=3Dcenter =
style=3D'text-align:center'><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><hr size=3D2 =
width=3D"98%" align=3Dcenter></span></div><div id=3DdivRplyFwdMsg><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
> Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br><b>Sent:</b> =
Saturday, March 4, 2017 8:31 AM<br><b>To:</b> 'Ron Bonica'; 'Shitanshu =
Shah'; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> RE: =
[RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'> =
<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>&nbsp;<o:p></o:p=
></span></p></div></div><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Shitanshu: </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Please address Ron&#8217;s comment about widely deployed.&nbsp; I =
believe this was part of Alvaro&#8217;s comments. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue </span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
 rtg-dir [<a =
href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-dir-bounces@ietf.org<=
/a>] <b>On Behalf Of </b>Ron Bonica<br><b>Sent:</b> Thursday, February =
23, 2017 12:07 PM<br><b>To:</b> Shitanshu Shah; <a =
href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> Re: =
[RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</span><span =
style=3D'color:black'><o:p></o:p></span></p></div></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hello,</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The draft is internally consistent. But given what is left out of =
scope, I wonder if the new attributes will ever be widely =
deployed.</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><br>This document might benefit from discussion of operational issues. =
I assume that when a BGP listener learns a route with the SLA Exchange =
Attribute, it provisions class of service forwarding classes on =
interfaces.</span><span =
style=3D'color:black'><o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:"Menlo","serif";color:black'>##svsha=
h, though this is one desired use of exchanging SLA content, the draft =
focuses on transporting SLA content from the SLA Producer to the SLA =
Consumer. Processing of the QoS attribute content, at the SLA Consumer, =
is outside the scope of this document.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p style=3D'min-height:13px'><span =
style=3D'font-size:8.5pt;font-family:"Menlo","serif";color:black'>&nbsp;<=
/span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p><span =
style=3D'font-size:8.5pt;font-family:"Menlo","serif";color:black'>##svsha=
h, Let me know if you have a suggestion to make description clearer in =
Section 1 and 2 to highlight this.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>I also assume that a) it takes time to provision class of service =
forwarding classes and b) the number of forwarding classes that can be =
provisioned are finite. What does the BGP listener do when the number of =
forwarding classes requested exceeds its capacity to =
deliver?&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:"Menlo","serif";color:black'>##svsha=
h, Since scope of the document is to transport SLA content from the SLA =
Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and =
semantics errors within that context. Any errors in the context of =
processing QoS attribute content at the SLA Consumer is outside the =
scope of the document.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:8.5pt;font-family:"Menlo","serif";color:black'>&nbsp;<=
/span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div></div></div></div></div=
></div></body></html>
------=_NextPart_000_00B5_01D2966C.2912FBB0--


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Hi Sue,

Please kindly allow me to clarify two points here ...

Point 1:

You said:

"The BGP peers would carry this information in a separate informational
stream.  With this constraint,
it was approved by the IESG.
=E2=80=8B"

=E2=80=8BHowever looking at RFC7752 at most it lightly says three times tha=
t
dedicated RRs may be used to disseminate collected information. =E2=80=8BSo=
 while I
do recall how this extension was "sold" I am afraid in no way this has any
bearing on how it will be used now or in the future deployments.

=E2=80=8BPoint 2:

In your comment I see major concerns with security .. Well let's keep in
mind that this proposal is specific to MSDC. As such by design it is all
under single administrative domain .. hence I think non of the security
points really apply.

Cheers,
R.


On Mon, Mar 6, 2017 at 5:25 PM, Susan Hares <shares@ndzh.com> wrote:

> Reviewer: Susan Hares
> Review result: Has Issues
>
> The RTG-DIR has the categories:  minor concerns or major concerns
> regarding "issues", I wil differentiate my issues by this quality.
> I also have editorial nits regardign under specified text.
>
> Major concerns:
> 1) The security section is not sufficient for any review by the
> Security area
>
> This draft depends on IDR WG draft (ietf-idr-bgp-prefix-sid) that
> defines the BGP Segment attribute.  If this attribute is used with
> IPv6, this simply gives more infromation about a link to a next.
> However, the combination of this information with the information
> passed using draft-ietf-idr-bgpls-segment-routing-epe-09 that utilizes
> BGP to pass BGP topologies in BGP - requires a better security
> section.  BGP-LS was described to be an "information gathering"
> function handled by a few routers on the edge of the network to obtain
> link-state topology information.  The BGP peers would carry this
> information in a separate informational stream.  With this constraint,
> it was approved by the IESG.
> draft-ietf-idr-bgpls-segment-routing-epe  expands the initial concept
> of BGP-LS from "information gathering" to a full-routing scheme of BGP
> within BGP for data centers and for data center interconnection to the
> network.   This extension takes it out of the approved range of the
> BGP-LS.  Therefore, the security sections in both the IDR WG drafts
> and this draft need to describe the new threat scenarios and describe
> threat mitigation strategies for deployments.
>
> In addition, the information by BGP-LS
> (draft-ietf-idr-bgpls-segment-routing-epe) or in draft-ietf-bgp-sid
> may have privacy issues - so these need to be described the security
> section.
>
> 2) through-out the text you use words such as "ebgp3107" or BGP 3107
> updates"
>
> This phrase is inaccurate.  The base RFC3107 support will not provide
> BGP-Prefix support (as supported in bgp-idr-bgp-prefix.   Some texts
> goes on to clarify the addition of the BGP SID Prefix attribute.  It
> would be better to invent a new phrase or term.
>
> In section 8.1, the authors state:
> "The Prefix Segement is a lightweight extension to the BGP Labelled
> Unicast".  As noted in my #1 major concern, this "hand-waving"
> description either needs to be refined to be accurate.  If the MPLS
> usage only uses the BGP-Prefix label and does not extend to the
> Egress, it is simplier.  However, it is not clear that is what section
> 8.1 is about.   If 8.1 includes the
> draft-ietf-idr-bgpls-segment-routing-epe, then BGP-LS addition does
> have a number of prefixes and rules.   The trade-off between BGP-LS +
> BGP-LS SID (draft-ietf-idr-bgp-sid) handling + BGP LS egress peer
> engineering draft (draft-ietf-idr-bgp-segment-routing-epe) and a
> signalling protocol is more complex than the hand-wave.  It may be the
> right choice based on current implementations and management issues,
> but these need to be laid specifically.
>
> 3) Why are you defining 2-byte Private Use AS when there are plenty of
> 4-Byte Private Use AS (p. 5).
>
> This usage increases the confusion regarding 2-byte/4-byte ASN.  IDR
> specifically worked on 4 byte ASN.
>
> Minor concerns
> 1) It is not clear what happens in section 4.2.2 and figure 3-5
>
> What happens if the traffic goes to node 3 instead of node 4 on the
> ECMP path?
> What happens if the traffic goes to node 8 instead of node 7 on the
> ECMP Path?
>
> Is there something missing in the stroy?
>
> 2) section 4.3 - IBGP Labeled Unicast.
>
> The phrase "iBGP3107 reflection with nhop-self" needs to be explicitly
> spelled out as IBGP Route-Reflection with next-hop self.  If that is
> not what the authors mean, then it needs to be further spelled out.
> It is unclear where the central IBGP nodes are that share fully the
> information learned from the three clusters. (nodes:5-8 cluster 1,
> nodes 3-4 cluster 2, nodes 9-10 cluster 3).
>
> This section has hints of a solution, but it is miss a great deal.
> Please upgrade to specific solution.  A diagram might help.
>
> 3) Load Sharing hints (Section 7.1)
>
> Elephant flow and mice flows are good descriptions.  Flowlets and VL2
> should either warrant a 1 sentence explanation that actually describes
> these features in a 22 page draft, or be removed.
>
> 4)  The lack of a manageability or operations section (TBD in version
> -02) - concerns me.  The operational issues may be well known to the
> data centers and devices manufacturers who have implement this
> specification, but this is an interoperability specification for IETF.
>  Some manageabilty comments should be included or a BCP pointed to.
>
> Editorial issues:
>
> #1 - The following 4 abbrevitions need to be initially expanded when
> first used:  CLOs (p.3),  SRGB(p.6), flowlets (p. 14), and VL2 (p.
> 14).
>
> #2 - page 7, section 4.2 last paragraph
> Old/: assuming the IP Addresses, AS and label-index allocation
> previously described, the"
> New/: assuming the IP address with the AS and label-index allocation
> previously described, the"
> [Comma is optional]
>
> #3 - page 14, section 7.1 paragraph 4,  /(e.g. spine switch Node1)/  -
> by the diagram it should be node 5-8 or an error.  Please check the
> number
>
> #4 - page 17, section 8.2 paragraph 2.
>
> Old/
> This is easily accomplished by encapsulating the trafffic either
> directly at the host or the source ToR node by pushing the BGP-
> Prefix-SID of the destination ToR for intra-DC traffic, or border
> node for inter-DC or DC-to-outside-world traffic./
>
> New/
> This is easily accomplished by encapsulating the trafffic either
> directly at the host or the source ToR node  by pushing  the BGP-
> Prefix-SID of the destination ToR for intra-DC traffic, or
> the BGP-Prefix-SID for the the border node for inter-DC or
> DC-to-outside-world traffic./
>
> If this is not the correct logic, then you can reword this further.
> I read it 4 or 5 times.
>
> #5 - Adding a diagram to section 4.3 might help your description.
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--001a113c5e7287fe75054a12c560
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small">Hi Sue,</div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:small">Please kindly allow me to clarify two points here ...=
=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif;font-size:small">Point 1:</div><=
div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif=
;font-size:small"><br></div><div class=3D"gmail_default" style=3D"font-fami=
ly:arial,helvetica,sans-serif;font-size:small">You said:=C2=A0</div><div cl=
ass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-=
size:small"><br></div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small">&quot;<span style=3D"font-size:12.=
8px;font-family:arial,sans-serif">The BGP peers would carry this=C2=A0</spa=
n><span style=3D"font-size:12.8px;font-family:arial,sans-serif">information=
 in a separate informational stream.=C2=A0 With this constraint,</span></di=
v><span style=3D"font-size:12.8px">it was approved by the IESG.<div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small;display:inline">=E2=80=8B&quot;</div></span><div><span style=3D"fon=
t-size:12.8px"><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif;font-size:small;display:inline"><br></div></span></div><di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:small">=E2=80=8BHowever looking at RFC7752 at most it lightly=
 says three times that dedicated RRs may be used to disseminate collected i=
nformation. =E2=80=8BSo while I do recall how this extension was &quot;sold=
&quot; I am afraid in no way this has any bearing on how it will be used no=
w or in the future deployments.</div><br></div><div><div class=3D"gmail_def=
ault" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">=E2=
=80=8BPoint 2:</div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">In your=
 comment I see major concerns with security .. Well let&#39;s keep in mind =
that this proposal is specific to MSDC. As such by design it is all under s=
ingle administrative domain .. hence I think non of the security points rea=
lly apply.=C2=A0</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small"><br></div><div class=3D"gmail_defa=
ult" style=3D"font-family:arial,helvetica,sans-serif;font-size:small">Cheer=
s,<br>R.</div></div><div><br></div></div><div class=3D"gmail_extra"><br><di=
v class=3D"gmail_quote">On Mon, Mar 6, 2017 at 5:25 PM, Susan Hares <span d=
ir=3D"ltr">&lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@=
ndzh.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Reviewer=
: Susan Hares<br>
Review result: Has Issues<br>
<br>
The RTG-DIR has the categories:=C2=A0 minor concerns or major concerns<br>
regarding &quot;issues&quot;, I wil differentiate my issues by this quality=
.<br>
I also have editorial nits regardign under specified text.<br>
<br>
Major concerns:<br>
1) The security section is not sufficient for any review by the<br>
Security area<br>
<br>
This draft depends on IDR WG draft (ietf-idr-bgp-prefix-sid) that<br>
defines the BGP Segment attribute.=C2=A0 If this attribute is used with<br>
IPv6, this simply gives more infromation about a link to a next.<br>
However, the combination of this information with the information<br>
passed using draft-ietf-idr-bgpls-segment-<wbr>routing-epe-09 that utilizes=
<br>
BGP to pass BGP topologies in BGP - requires a better security<br>
section.=C2=A0 BGP-LS was described to be an &quot;information gathering&qu=
ot;<br>
function handled by a few routers on the edge of the network to obtain<br>
link-state topology information.=C2=A0 The BGP peers would carry this<br>
information in a separate informational stream.=C2=A0 With this constraint,=
<br>
it was approved by the IESG.<br>
draft-ietf-idr-bgpls-segment-<wbr>routing-epe=C2=A0 expands the initial con=
cept<br>
of BGP-LS from &quot;information gathering&quot; to a full-routing scheme o=
f BGP<br>
within BGP for data centers and for data center interconnection to the<br>
network.=C2=A0 =C2=A0This extension takes it out of the approved range of t=
he<br>
BGP-LS.=C2=A0 Therefore, the security sections in both the IDR WG drafts<br=
>
and this draft need to describe the new threat scenarios and describe<br>
threat mitigation strategies for deployments.<br>
<br>
In addition, the information by BGP-LS<br>
(draft-ietf-idr-bgpls-segment-<wbr>routing-epe) or in draft-ietf-bgp-sid<br=
>
may have privacy issues - so these need to be described the security<br>
section.<br>
<br>
2) through-out the text you use words such as &quot;ebgp3107&quot; or BGP 3=
107<br>
updates&quot;<br>
<br>
This phrase is inaccurate.=C2=A0 The base RFC3107 support will not provide<=
br>
BGP-Prefix support (as supported in bgp-idr-bgp-prefix.=C2=A0 =C2=A0Some te=
xts<br>
goes on to clarify the addition of the BGP SID Prefix attribute.=C2=A0 It<b=
r>
would be better to invent a new phrase or term.<br>
<br>
In section 8.1, the authors state:<br>
&quot;The Prefix Segement is a lightweight extension to the BGP Labelled<br=
>
Unicast&quot;.=C2=A0 As noted in my #1 major concern, this &quot;hand-wavin=
g&quot;<br>
description either needs to be refined to be accurate.=C2=A0 If the MPLS<br=
>
usage only uses the BGP-Prefix label and does not extend to the<br>
Egress, it is simplier.=C2=A0 However, it is not clear that is what section=
<br>
8.1 is about.=C2=A0 =C2=A0If 8.1 includes the<br>
draft-ietf-idr-bgpls-segment-<wbr>routing-epe, then BGP-LS addition does<br=
>
have a number of prefixes and rules.=C2=A0 =C2=A0The trade-off between BGP-=
LS +<br>
BGP-LS SID (draft-ietf-idr-bgp-sid) handling + BGP LS egress peer<br>
engineering draft (draft-ietf-idr-bgp-segment-<wbr>routing-epe) and a<br>
signalling protocol is more complex than the hand-wave.=C2=A0 It may be the=
<br>
right choice based on current implementations and management issues,<br>
but these need to be laid specifically.<br>
<br>
3) Why are you defining 2-byte Private Use AS when there are plenty of<br>
4-Byte Private Use AS (p. 5).<br>
<br>
This usage increases the confusion regarding 2-byte/4-byte ASN.=C2=A0 IDR<b=
r>
specifically worked on 4 byte ASN.<br>
<br>
Minor concerns<br>
1) It is not clear what happens in section 4.2.2 and figure 3-5<br>
<br>
What happens if the traffic goes to node 3 instead of node 4 on the<br>
ECMP path?<br>
What happens if the traffic goes to node 8 instead of node 7 on the<br>
ECMP Path?<br>
<br>
Is there something missing in the stroy?<br>
<br>
2) section 4.3 - IBGP Labeled Unicast.<br>
<br>
The phrase &quot;iBGP3107 reflection with nhop-self&quot; needs to be expli=
citly<br>
spelled out as IBGP Route-Reflection with next-hop self.=C2=A0 If that is<b=
r>
not what the authors mean, then it needs to be further spelled out.<br>
It is unclear where the central IBGP nodes are that share fully the<br>
information learned from the three clusters. (nodes:5-8 cluster 1,<br>
nodes 3-4 cluster 2, nodes 9-10 cluster 3).<br>
<br>
This section has hints of a solution, but it is miss a great deal.<br>
Please upgrade to specific solution.=C2=A0 A diagram might help.<br>
<br>
3) Load Sharing hints (Section 7.1)<br>
<br>
Elephant flow and mice flows are good descriptions.=C2=A0 Flowlets and VL2<=
br>
should either warrant a 1 sentence explanation that actually describes<br>
these features in a 22 page draft, or be removed.<br>
<br>
4)=C2=A0 The lack of a manageability or operations section (TBD in version<=
br>
-02) - concerns me.=C2=A0 The operational issues may be well known to the<b=
r>
data centers and devices manufacturers who have implement this<br>
specification, but this is an interoperability specification for IETF.<br>
=C2=A0Some manageabilty comments should be included or a BCP pointed to.<br=
>
<br>
Editorial issues:<br>
<br>
#1 - The following 4 abbrevitions need to be initially expanded when<br>
first used:=C2=A0 CLOs (p.3),=C2=A0 SRGB(p.6), flowlets (p. 14), and VL2 (p=
.<br>
14).<br>
<br>
#2 - page 7, section 4.2 last paragraph<br>
Old/: assuming the IP Addresses, AS and label-index allocation<br>
previously described, the&quot;<br>
New/: assuming the IP address with the AS and label-index allocation<br>
previously described, the&quot;<br>
[Comma is optional]<br>
<br>
#3 - page 14, section 7.1 paragraph 4,=C2=A0 /(e.g. spine switch Node1)/=C2=
=A0 -<br>
by the diagram it should be node 5-8 or an error.=C2=A0 Please check the<br=
>
number<br>
<br>
#4 - page 17, section 8.2 paragraph 2.<br>
<br>
Old/<br>
This is easily accomplished by encapsulating the trafffic either<br>
directly at the host or the source ToR node by pushing the BGP-<br>
Prefix-SID of the destination ToR for intra-DC traffic, or border<br>
node for inter-DC or DC-to-outside-world traffic./<br>
<br>
New/<br>
This is easily accomplished by encapsulating the trafffic either<br>
directly at the host or the source ToR node=C2=A0 by pushing=C2=A0 the BGP-=
<br>
Prefix-SID of the destination ToR for intra-DC traffic, or<br>
the BGP-Prefix-SID for the the border node for inter-DC or<br>
DC-to-outside-world traffic./<br>
<br>
If this is not the correct logic, then you can reword this further.<br>
I read it 4 or 5 times.<br>
<br>
#5 - Adding a diagram to section 4.3 might help your description.<br>
<br>
<br>
______________________________<wbr>_________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org">spring@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" rel=3D"noreferrer"=
 target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/spring</a><br=
>
</blockquote></div><br></div>

--001a113c5e7287fe75054a12c560--


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Subject: Re: [RTG-DIR] [spring] Review of	draft-ietf-spring-segment-routing-msdc-03
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Stefano:=20

Summary:  As I have often said, I believe in helping BGP meet the needs =
of operators (DC or BGP), and this includes BGP-LS.  If your transition =
from OSPF/IS-IS LSPs to BGP in BGP to MPLS is to meet operator needs - =
great.   Just document the security concern issues (new types of =
information, privacy issues on sending link info).=20

My "concern" comments on BGP-LS only focus on 3 things:=20
1) Upgrade your security section to deal with issues regarding new types =
of information and privacy issues on sending link-information (inside DC =
or DCI)=20
 1 to 3 paragraphs should be sufficient.  I will suggest text.=20
2) Be precise in your RFC3107 terminology -=20
3)  Encourage the use of 4-byte Private AS, and treat 2-byte Private =
ASes as a legacy issues.   =20

All response below boil down to this summary.   Editorial Nits are your =
choice to adopt/not-adopt.  IETF LC and IESG review will provide you =
lots of feedback on editorial nits. =20

Sue=20

-----Original Message-----
From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Stefano =
Previdi (sprevidi)
Sent: Tuesday, March 7, 2017 6:21 AM
To: Susan Hares
Cc: rtg-dir@ietf.org; spring@ietf.org; ietf@ietf.org; =
draft-ietf-spring-segment-routing-msdc.all@ietf.org
Subject: Re: [RTG-DIR] [spring] Review of =
draft-ietf-spring-segment-routing-msdc-03

Hi Sue,

thanks for the review. Some comments below.


> On Mar 6, 2017, at 5:25 PM, Susan Hares <shares@ndzh.com> wrote:
>=20
> Reviewer: Susan Hares
> Review result: Has Issues
>=20
> The RTG-DIR has the categories:  minor concerns or major concerns=20
> regarding "issues", I wil differentiate my issues by this quality.
> I also have editorial nits regardign under specified text.=20
>=20
> Major concerns:=20
> 1) The security section is not sufficient for any review by the=20
> Security area
>=20
> This draft depends on IDR WG draft (ietf-idr-bgp-prefix-sid) that=20
> defines the BGP Segment attribute.  If this attribute is used with=20
> IPv6, this simply gives more infromation about a link to a next.
> However, the combination of this information with the information=20
> passed using draft-ietf-idr-bgpls-segment-routing-epe-09 that utilizes =

> BGP to pass BGP topologies in BGP - requires a better security=20
> section.  BGP-LS was described to be an "information gathering"
> function handled by a few routers on the edge of the network to obtain =

> link-state topology information.  The BGP peers would carry this=20
> information in a separate informational stream.  With this constraint,
> it was approved by the IESG.  =20

Stefano: well, we have now different models that have been deployed and =
assuming that bgp-ls uses a separate stream is not accurate if we look =
what=E2=80=99s in the industry.  However, I take your point and I agree =
that more text in the security section is required in order to emphasize =
that the model the draft addresses is internal (DC and interconnected DC =
over a same-administration network).

Sue:  Good.  I look forward to your security section.  Please note to =
clearly state (or reference) whether the interconnected DC is over =
physically isolated or logically isolated on shared infrastructure.   =
Please indicated any privacy issues.=20

> draft-ietf-idr-bgpls-segment-routing-epe  expands the initial concept=20
> of BGP-LS from "information gathering" to a full-routing scheme of BGP =

> within BGP for data centers and for data center interconnection to the =

> network.

Stefano: EPE defines a model where the topology of the peering point =
(not the network, just the peering point) is advertised to an internal =
server.
Yes, but the topology of peering point may be considered information =
that falls under the "privacy" issues in security.   The security =
considerations should indicate whether you assume the peering point is =
physically isolated or shared infrastructure.  If shared infrastructure, =
are you requiring TCP-AO to e securie.=20

>   This extension takes it out of the approved range of the BGP-LS.
Stefano:  I don=E2=80=99t know what is the =E2=80=9Capproved =
range=E2=80=9D. To me, bgp-ls carries topology information. We started =
with lsdb, then extended to mpls-lsp's, ip tunnels, peering points, and =
more will come. The security of bgp-ls doesn=E2=80=99t change. =
It=E2=80=99s the boundary of the network where bgp-ls is applied that =
matters.

Sue: The focus is the security in this sentence.  The security case in =
the original BGP-LS was the transportation of the BGP-LS information =
(OSPF/ISIS topologies) on a separate network.  If you have changed due =
to customer needs/wants, fine.  Just provide the security case in the 3 =
paragraphs. =20

>  Therefore, the security sections in both the IDR WG drafts and this=20
> draft need to describe the new threat scenarios and describe threat=20
> mitigation strategies for deployments.

Stefano: I will add more text about the information originated by bgp-ls =
(or the bgp prefix sid) and how it is intended to be consumed internally =
to a domain.
Sue: Great!=20

> In addition, the information by BGP-LS =
(draft-ietf-idr-bgpls-segment-routing-epe) or in draft-ietf-bgp-sid=20
> may have privacy issues - so these need to be described the security  =
section.

Stefano: same here. I will emphasize the deployment model and the =
security boundaries.
Sue: Wonderful!=20

> 2) through-out the text you use words such as "ebgp3107" or BGP 3107=20
> updates"
>=20
> This phrase is inaccurate.  The base RFC3107 support will not provide
> BGP-Prefix support (as supported in bgp-idr-bgp-prefix.   Some texts
> goes on to clarify the addition of the BGP SID Prefix attribute.  It=20
> would be better to invent a new phrase or term.

Stefano: I=E2=80=99ll check this out.
Sue: Great, just be a bit more precise in the test to aid future =
implementations.=20

> In section 8.1, the authors state:
> "The Prefix Segement is a lightweight extension to the BGP Labelled=20
> Unicast".  As noted in my #1 major concern, this "hand-waving"
> description either needs to be refined to be accurate.  If the MPLS=20
> usage only uses the BGP-Prefix label and does not extend to the=20
> Egress, it is simplier.

Stefano: the BGP Prefix SID Attribute is just an extension to a 3107 =
update.
Sue: BGP Prefix is an BGP attribute that goes along with BGP-lS BGP =
topology information in the whole solution. =20
The easiest thing is to just leave out the "evaluation".
 Alternatively, make the evaluation more precise by including more =
description.  =20

>  However, it is not clear that is what section
> 8.1 is about.   If 8.1 includes the
> draft-ietf-idr-bgpls-segment-routing-epe, then BGP-LS addition does
> have a number of prefixes and rules.   The trade-off between BGP-LS +
> BGP-LS SID (draft-ietf-idr-bgp-sid) handling + BGP LS egress peer=20
> engineering draft (draft-ietf-idr-bgp-segment-routing-epe) and a=20
> signalling protocol is more complex than the hand-wave.

Stefano: Not sure I understand your point but to me the statement:  =
=E2=80=9CThe Prefix Segment is a lightweight extension to the BGP =
Labelled Unicast=E2=80=9D is correct because the prefix-sid is really =
just a new attribute. Here we=E2=80=99re just talking protocol =
extension. The interaction and combination between prefix-sid and epe is =
a deployment and operational model that (we agreed above) requires more =
explanation in terms of security.

Sue: My purpose here is to simply point out where your RFC3107 and new =
BGP Prefix SID Text too loose. =20
If you want to say that "BGP Prefix SID is a new BGP attribute and it =
along with RFC3107 NLRI provides the internal-DC without the =
DCI-interconnection" - just state that.  =20
This is the purpose of the sentence below:=20
> It may be the  right choice based on current implementations and =
management issues,  but these need to be laid specifically.


> 3) Why are you defining 2-byte Private Use AS when there are plenty of =

> 4-Byte Private Use AS (p. 5).
Stefano: well, we just want to be sure we address the worse case where =
you only have 2 octets.
Sue:  It would be better to encourage the general use of 4-Byte ASes =
which have enough space to give most data center's one AS per box, and =
then deal with the worst case issues.=20

>=20
> This usage increases the confusion regarding 2-byte/4-byte ASN.  IDR  =
specifically worked on 4 byte ASN.

Stefano: yes but in order to be aligned with 7938 we also take into =
account 2 octet ASN and the re-usability of these numbers.
Sue: Wonderful, just add the 4 byte AS. =20

> Minor concerns
> 1) It is not clear what happens in section 4.2.2 and figure 3-5
>=20
> What happens if the traffic goes to node 3 instead of node 4 on the=20
> ECMP path?
> What happens if the traffic goes to node 8 instead of node 7 on the=20
> ECMP Path?
>=20
> Is there something missing in the stroy?=20


nope. This is plain segment routing. As explained in the draft, assuming =
that you use the same SRGB (as recommended) a node is known through the =
same sid value all along the network so ecmp becomes trivial.


> 2) section 4.3 - IBGP Labeled Unicast.=20
>=20
> The phrase "iBGP3107 reflection with nhop-self" needs to be explicitly =

> spelled out as IBGP Route-Reflection with next-hop self.

ok

>  If that is
> not what the authors mean, then it needs to be further spelled out.=20
> It is unclear where the central IBGP nodes are that share fully the=20
> information learned from the three clusters. (nodes:5-8 cluster 1,=20
> nodes 3-4 cluster 2, nodes 9-10 cluster 3).
>=20
> This section has hints of a solution, but it is miss a great deal.=20
> Please upgrade to specific solution.  A diagram might help.=20


yes. I=E2=80=99ll check this out. In short (you certainly figured it =
out) it=E2=80=99s about using iBGP session where each node acts as a RR =
so to propagate to other iBGP peers (this is what "iBGP =
reflection=E2=80=9D refers to). I agree, it=E2=80=99s probably a bit too =
cryptic.


> 3) Load Sharing hints (Section 7.1)
>=20
> Elephant flow and mice flows are good descriptions.  Flowlets and VL2=20
> should either warrant a 1 sentence explanation that actually describes =

> these features in a 22 page draft, or be removed.


We have a reference for them but will add more text.


> 4)  The lack of a manageability or operations section (TBD in version
> -02) - concerns me.  The operational issues may be well known to the=20
> data centers and devices manufacturers who have implement this=20
> specification, but this is an interoperability specification for IETF.
> Some manageabilty comments should be included or a BCP pointed to.=20


ack.


> Editorial issues:=20


I=E2=80=99ll go through all below and update the draft asap.

Thanks.
s.


>=20
> #1 - The following 4 abbrevitions need to be initially expanded when=20
> first used:  CLOs (p.3),  SRGB(p.6), flowlets (p. 14), and VL2 (p.
> 14).=20
>=20
> #2 - page 7, section 4.2 last paragraph
> Old/: assuming the IP Addresses, AS and label-index allocation=20
> previously described, the"
> New/: assuming the IP address with the AS and label-index allocation=20
> previously described, the"
> [Comma is optional]
>=20
> #3 - page 14, section 7.1 paragraph 4,  /(e.g. spine switch Node1)/  - =

> by the diagram it should be node 5-8 or an error.  Please check the=20
> number
>=20
> #4 - page 17, section 8.2 paragraph 2.=20
>=20
> Old/
> This is easily accomplished by encapsulating the trafffic either=20
> directly at the host or the source ToR node by pushing the BGP-=20
> Prefix-SID of the destination ToR for intra-DC traffic, or border node =

> for inter-DC or DC-to-outside-world traffic./
>=20
> New/
> This is easily accomplished by encapsulating the trafffic either=20
> directly at the host or the source ToR node  by pushing  the BGP-=20
> Prefix-SID of the destination ToR for intra-DC traffic, or the=20
> BGP-Prefix-SID for the the border node for inter-DC or=20
> DC-to-outside-world traffic./
>=20
> If this is not the correct logic, then you can reword this further.=20
> I read it 4 or 5 times.=20
>=20
> #5 - Adding a diagram to section 4.3 might help your description.=20
>=20
>=20
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring



From nobody Tue Mar  7 07:43:16 2017
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From: Christian Hopps <chopps@chopps.org>
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Subject: [RTG-DIR] RtgDir review for draft-ietf-idr-bgp-prefix-sid-04
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[ Sorry for the repost I missed the rtg-dir address the first time.
Probably better to comment on the idr@ post if need be. ]

I have been selected as the Routing Directorate reviewer for this draft. The
Routing Directorate seeks to review all routing or routing-related drafts as
they pass through IETF last call and IESG review, and sometimes on special
request. The purpose of the review is to provide assistance to the Routing =
ADs.
For more information about the Routing Directorate, please see
=E2=80=8Bhttp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it wo=
uld
be helpful if you could consider them along with any other IETF Last Call
comments that you receive, and strive to resolve them through discussion or=
 by
updating the draft.

Document: draft-ietf-idr-bgp-prefix-sid-04
Reviewer: Christian Hopps
Review Date: 2017-03-04
IETF LC End Date: Unknown
Intended Status: Standards Track

Summary:
=3D=3D=3D=3D=3D=3D=3D=3D

    [x] This document is basically ready for publication, but has nits that
    should be considered prior to publication.

Comments:
=3D=3D=3D=3D=3D=3D=3D=3D=3D

Draft is quite readable.

Major Issues:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

No major issues found.

Minor Issues:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

References normative vs informative. I'm not sure why some of the informati=
ve
aren't normative. For example the S-bit indicates that the router is capabl=
e of
processing the SRH which is defined by [I-D.ietf-6man-segment-routing-heade=
r] so
shouldn't this be a Normative reference? Additionally the Originator SRGB T=
LV
references [I-D.ietf-ospf-segment-routing-extensions] for the meaning of
multiple ranges (represented by the presence of multiple TLVs).

Advisory only: There are many cases of reserved fields being "SHOULD be 0 on
transmit and MUST be ignored on receive." Is it better to use MUST instead =
of
SHOULD here as that allows for better future-proofing? With "MUST be 0" you
could then count on the values being zero for devices that do not support a
future extension where the value is not zero. Of course future extensions c=
ould
always use another method to determine if the reserved field holds newly va=
lid
values so this isn't that big a deal.

Nits:
=3D=3D=3D=3D=3D

By far there are more references to "nodes" than to "routers", but I think =
they
all refer to the same thing -- maybe pick one name.

Section 4 1st paragraph: remove first sentence starting "The value field..."

2nd paragraph: Add "The" to "Following TLVs are defined."

Section 4.3 2nd paragraph of description of SRGB (1st paragraph on page.8) =
uses
an unexpanded acronym SRTE.

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From: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
To: Susan Hares <shares@ndzh.com>
Thread-Topic: [RTG-DIR] [spring] Review of draft-ietf-spring-segment-routing-msdc-03
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From: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
To: "draft-ietf-spring-segment-routing-central-epe@ietf.org" <draft-ietf-spring-segment-routing-central-epe@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: Routing directorate review of draft-ietf-spring-segment-routing-central-epe-04
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Date: Tue, 7 Mar 2017 18:35:45 +0000
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Subject: [RTG-DIR] Routing directorate review of draft-ietf-spring-segment-routing-central-epe-04
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From: Keyur Patel <keyur@arrcus.com>
To: Susan Hares <shares@ndzh.com>, 'Shitanshu Shah' <shitanshu_shah@hotmail.com>, 'Ron Bonica' <rbonica@juniper.net>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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To: Shitanshu Shah <shitanshu_shah@hotmail.com>, Susan Hares <shares@ndzh.com>, 'Ron Bonica' <rbonica@juniper.net>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Date: Tue, 7 Mar 2017 23:10:51 -0500
Thread-Topic: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Ron and Sue,
>From a service provider perspective, exchanging the SLA information between=
 the PE and CE would be very beneficial and could be widely used.  I think =
this is particular important in service provider's L3VPN networks where the=
 customers or service providers currently do not have full visibility to th=
e QoS policy in the other end of the connection but still needs matching CE=
-PE SLA/QoS policies to achieve the correct two-way traffic prioritization =
behavior during congestion.  In this example, once the SLA information exch=
ange is standardized, my expectation is that the different CE/PE vendors wo=
uld be able to automatically update in a vendor specific way, the SLA/QoS p=
olicies based on the SLA information provided via BGP.

Luis

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com]
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com>; 'Ron Bonica' <rbonica@juniper.net>; rtg-=
dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10


Hi Sue,



Following is what I had responded to Ron. Hopefully that addresses/clarifie=
s.



To break it down in two point response,



1) This draft is not changing how SLA is established at first place. The dr=
aft is providing a method to convey this a priori established SLA to help r=
educe lot of manual complexities and errors to admin. Thus given a knowledg=
e of what SLA is established, in general devices should be capable to suppo=
rt that established SLA.





2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or of temporary nature =
where for example enough resources not available at any specific point of a=
 time.



We feel that in current state of the draft, it can be largely useful in dep=
loyments.







One can imagine though even establishment of SLA also can be done via excha=
nging it over bgp. However, negotiation of SLA does not have to be clubbed =
with exchange of SLA. Negotiation of SLA is not in this scope.


Regards,
Shitanshu

________________________________
From: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org<mailto:rtg-dir@ietf.or=
g>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exch=
ange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Shitanshu:

Please address Ron's comment about widely deployed.  I believe this was par=
t of Alvaro's comments.

Sue

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org<mailto:rtg-dir@ietf.org>; draft-ietf-i=
dr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exchange.all@ietf.or=
g>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hello,

The draft is internally consistent. But given what is left out of scope, I =
wonder if the new attributes will ever be widely deployed.

                                                                           =
     Ron



This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.


##svshah, though this is one desired use of exchanging SLA content, the dra=
ft focuses on transporting SLA content from the SLA Producer to the SLA Con=
sumer. Processing of the QoS attribute content, at the SLA Consumer, is out=
side the scope of this document.



##svshah, Let me know if you have a suggestion to make description clearer =
in Section 1 and 2 to highlight this.


I also assume that a) it takes time to provision class of service forwardin=
g classes and b) the number of forwarding classes that can be provisioned a=
re finite. What does the BGP listener do when the number of forwarding clas=
ses requested exceeds its capacity to deliver?


##svshah, Since scope of the document is to transport SLA content from the =
SLA Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and semantic=
s errors within that context. Any errors in the context of processing QoS a=
ttribute content at the SLA Consumer is outside the scope of the document.





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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3D"#0563C1=
" vlink=3D"#954F72"><div class=3DWordSection1><p class=3DMsoNormal><span st=
yle=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Ron=
 and Sue,<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-siz=
e:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>From a service pro=
vider perspective, exchanging the SLA information between the PE and CE wou=
ld be very beneficial and could be widely used.&nbsp; I think this is parti=
cular important in service provider&#8217;s L3VPN networks where the custom=
ers or service providers currently do not have full visibility to the QoS p=
olicy in the other end of the connection but still needs matching CE-PE SLA=
/QoS policies to achieve the correct two-way traffic prioritization behavio=
r during congestion.&nbsp; In this example, once the SLA information exchan=
ge is standardized, my expectation is that the different CE/PE vendors woul=
d be able to automatically update in a vendor specific way, the SLA/QoS pol=
icies based on the SLA information provided via BGP.&nbsp; <o:p></o:p></spa=
n></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Cal=
ibri",sans-serif;color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoN=
ormal><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;colo=
r:#1F497D'>Luis<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'fo=
nt-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p>&nbsp;<=
/o:p></span></p><div><div style=3D'border:none;border-top:solid #E1E1E1 1.0=
pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span style=3D'font-s=
ize:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style=3D=
'font-size:11.0pt;font-family:"Calibri",sans-serif'> Shitanshu Shah [mailto=
:shitanshu_shah@hotmail.com] <br><b>Sent:</b> Monday, March 6, 2017 9:31 AM=
<br><b>To:</b> Susan Hares &lt;shares@ndzh.com&gt;; 'Ron Bonica' &lt;rbonic=
a@juniper.net&gt;; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.o=
rg; idr@ietf.org<br><b>Subject:</b> [E] Re: [RTG-DIR] RtgDir review: draft-=
ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p class=3DMsoNor=
mal><o:p>&nbsp;</o:p></p><div id=3Ddivtagdefaultwrapper><p><span style=3D'f=
ont-family:"Calibri",sans-serif;color:black'>Hi Sue,<o:p></o:p></span></p><=
p><span style=3D'font-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;<=
/o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:bl=
ack'>Following is what I had responded to Ron. Hopefully&nbsp;that addresse=
s/clarifies.<o:p></o:p></span></p><p><span style=3D'font-family:"Calibri",s=
ans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-f=
amily:"Calibri",sans-serif;color:black'>To break it down in two point respo=
nse,<o:p></o:p></span></p><p><span style=3D'font-family:"Calibri",sans-seri=
f;color:black'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-family:"C=
alibri",sans-serif;color:black'>1) This draft is not changing how SLA is es=
tablished at first place. The draft&nbsp;is providing a method to convey th=
is a priori established&nbsp;SLA to help reduce lot of manual complexities =
and errors to admin. Thus given a knowledge of what SLA is established, in =
general devices should be capable to support that established&nbsp;SLA.<o:p=
></o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:=
black'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-family:"Calibri",=
sans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-=
family:"Calibri",sans-serif;color:black'>2) If there still are any issues i=
n implementing exchanged SLA in forwarding, we think they either are implem=
entation specific or&nbsp;of temporary nature where for example enough reso=
urces not available at any specific point of a time.<o:p></o:p></span></p><=
p><span style=3D'font-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;<=
/o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:bl=
ack'>We feel that in current state of the draft, it can be largely useful i=
n deployments.<o:p></o:p></span></p><p><span style=3D'font-family:"Calibri"=
,sans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font=
-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p><s=
pan style=3D'font-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;</o:p=
></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:black'=
>One can imagine though even establishment of SLA also can&nbsp;be done via=
 exchanging it over bgp. However, negotiation of SLA does not have to be cl=
ubbed with exchange of SLA. Negotiation of SLA is not in this scope.<o:p></=
o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:bla=
ck'><o:p>&nbsp;</o:p></span></p><div><p class=3DMsoNormal><span style=3D'fo=
nt-family:"Calibri",sans-serif;color:black'>Regards,<o:p></o:p></span></p><=
/div><div><p class=3DMsoNormal><span style=3D'font-family:"Calibri",sans-se=
rif;color:black'>Shitanshu<o:p></o:p></span></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span style=3D'font-family:"Calibri",sans-se=
rif;color:black'><o:p>&nbsp;</o:p></span></p><div><div class=3DMsoNormal al=
ign=3Dcenter style=3D'text-align:center'><span style=3D'font-family:"Calibr=
i",sans-serif;color:black'><hr size=3D2 width=3D"98%" align=3Dcenter></span=
></div><div id=3DdivRplyFwdMsg><p class=3DMsoNormal><b><span style=3D'font-=
size:11.0pt;font-family:"Calibri",sans-serif;color:black'>From:</span></b><=
span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:black=
'> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&g=
t;<br><b>Sent:</b> Saturday, March 4, 2017 8:31 AM<br><b>To:</b> 'Ron Bonic=
a'; 'Shitanshu Shah'; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org<=
/a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf=
-idr-sla-exchange.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.org">idr@iet=
f.org</a><br><b>Subject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sl=
a-exchange-10</span><span style=3D'font-family:"Calibri",sans-serif;color:b=
lack'> <o:p></o:p></span></p><div><p class=3DMsoNormal><span style=3D'font-=
family:"Calibri",sans-serif;color:black'>&nbsp;<o:p></o:p></span></p></div>=
</div><div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto'><span style=3D'font-size:11.0pt;font-family:"Calibri=
",sans-serif;color:#1F497D'>Shitanshu: </span><span style=3D'color:black'><=
o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;=
mso-margin-bottom-alt:auto'><span style=3D'font-size:11.0pt;font-family:"Ca=
libri",sans-serif;color:#1F497D'>&nbsp;</span><span style=3D'color:black'><=
o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;=
mso-margin-bottom-alt:auto'><span style=3D'font-size:11.0pt;font-family:"Ca=
libri",sans-serif;color:#1F497D'>Please address Ron&#8217;s comment about w=
idely deployed.&nbsp; I believe this was part of Alvaro&#8217;s comments. <=
/span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;=
</span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Sue </=
span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal=
 style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;=
</span><span style=3D'color:black'><o:p></o:p></span></p><div><div style=3D=
'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p c=
lass=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:aut=
o'><b><span style=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif;color=
:black'>From:</span></b><span style=3D'font-size:10.0pt;font-family:"Tahoma=
",sans-serif;color:black'> rtg-dir [<a href=3D"mailto:rtg-dir-bounces@ietf.=
org">mailto:rtg-dir-bounces@ietf.org</a>] <b>On Behalf Of </b>Ron Bonica<br=
><b>Sent:</b> Thursday, February 23, 2017 12:07 PM<br><b>To:</b> Shitanshu =
Shah; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"=
mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-sla-exchang=
e.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>=
Subject:</b> Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</s=
pan><span style=3D'color:black'><o:p></o:p></span></p></div></div><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><=
span style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal=
 style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hello,=
</span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;=
</span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The dr=
aft is internally consistent. But given what is left out of scope, I wonder=
 if the new attributes will ever be widely deployed.</span><span style=3D'c=
olor:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-=
top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0pt;fo=
nt-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;</span><span style=3D'c=
olor:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-=
top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0pt;fo=
nt-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<=
/span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;=
</span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;=
</span><span style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:black'><br>This=
 document might benefit from discussion of operational issues. I assume tha=
t when a BGP listener learns a route with the SLA Exchange Attribute, it pr=
ovisions class of service forwarding classes on interfaces.</span><span sty=
le=3D'color:black'><o:p></o:p></span></p><div><p class=3DMsoNormal style=3D=
'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-si=
ze:10.0pt;font-family:"Calibri",sans-serif;color:black'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p><span style=3D'fo=
nt-size:8.5pt;font-family:"Menlo",serif;color:black'>##svshah, though this =
is one desired use of exchanging SLA content, the draft focuses on transpor=
ting SLA content from the SLA Producer to the SLA Consumer. Processing of t=
he QoS attribute content, at the SLA Consumer, is outside the scope of this=
 document.</span><span style=3D'font-family:"Calibri",sans-serif;color:blac=
k'><o:p></o:p></span></p><p style=3D'min-height:13px'><span style=3D'font-s=
ize:8.5pt;font-family:"Menlo",serif;color:black'>&nbsp;</span><span style=
=3D'font-family:"Calibri",sans-serif;color:black'><o:p></o:p></span></p><p>=
<span style=3D'font-size:8.5pt;font-family:"Menlo",serif;color:black'>##svs=
hah, Let me know if you have a suggestion to make description clearer in Se=
ction 1 and 2 to highlight this.</span><span style=3D'font-family:"Calibri"=
,sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span styl=
e=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:black'>&nbsp;<=
/span><span style=3D'color:black'><o:p></o:p></span></p></div><div><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><=
span style=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:black=
'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p></div><div=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-al=
t:auto'><span style=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;co=
lor:black'>I also assume that a) it takes time to provision class of servic=
e forwarding classes and b) the number of forwarding classes that can be pr=
ovisioned are finite. What does the BGP listener do when the number of forw=
arding classes requested exceeds its capacity to deliver?&nbsp;</span><span=
 style=3D'color:black'><o:p></o:p></span></p></div><div><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=
=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:black'>&nbsp;</=
span><span style=3D'color:black'><o:p></o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:"Menlo",serif;color:black'>##svshah, S=
ince scope of the document is to transport SLA content from the SLA Produce=
r to the SLA Consumer, the document considers error handling in the context=
 of transporting data and thus any formating errors and semantics errors wi=
thin that context. Any errors in the context of processing QoS attribute co=
ntent at the SLA Consumer is outside the scope of the document.</span><span=
 style=3D'font-family:"Calibri",sans-serif;color:black'><o:p></o:p></span><=
/p><p style=3D'margin-bottom:12.0pt'><span style=3D'font-size:8.5pt;font-fa=
mily:"Menlo",serif;color:black'>&nbsp;</span><span style=3D'font-family:"Ca=
libri",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=3D=
MsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><spa=
n style=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color:black'>&=
nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p></div><div><p=
 class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:a=
uto'><span style=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;color=
:black'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p></di=
v></div></div></div></div></div></body></html>=

--_000_467340A77F13C944919805BFF3B8ACFC30DC040408FHDP1LUMXC7V9_--


From nobody Wed Mar  8 06:37:04 2017
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From: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
To: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
Thread-Topic: Routing directorate review of draft-ietf-spring-segment-routing-central-epe-04
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Date: Wed, 8 Mar 2017 14:36:59 +0000
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Subject: Re: [RTG-DIR] Routing directorate review of draft-ietf-spring-segment-routing-central-epe-04
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From nobody Wed Mar  8 06:42:16 2017
Return-Path: <Jonathan.Hardwick@metaswitch.com>
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From: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
To: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
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Cc: "draft-ietf-spring-segment-routing-central-epe@ietf.org" <draft-ietf-spring-segment-routing-central-epe@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "spring-chairs@ietf.org" <spring-chairs@ietf.org>
Subject: Re: [RTG-DIR] Routing directorate review of draft-ietf-spring-segment-routing-central-epe-04
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From nobody Wed Mar  8 07:27:43 2017
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From: "Susan Hares" <shares@ndzh.com>
To: "'Tomotaki, Luis M'" <luis.tomotaki@verizon.com>, "'Shitanshu Shah'" <shitanshu_shah@hotmail.com>, "'Ron Bonica'" <rbonica@juniper.net>, <rtg-dir@ietf.org>, <draft-ietf-idr-sla-exchange.all@ietf.org>, <idr@ietf.org>
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Date: Wed, 8 Mar 2017 10:22:33 -0500
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/ftiyRAypaX6juylWuzipWCh8fW0>
Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Luis: 

 

Thank you for letting me know you desire for this feature.   Since Ron had
additional questions, I'll let him start off this discussion. 

 

Sue 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Tomotaki, Luis M
Sent: Tuesday, March 7, 2017 11:11 PM
To: Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Ron and Sue,

>From a service provider perspective, exchanging the SLA information between
the PE and CE would be very beneficial and could be widely used.  I think
this is particular important in service provider's L3VPN networks where the
customers or service providers currently do not have full visibility to the
QoS policy in the other end of the connection but still needs matching CE-PE
SLA/QoS policies to achieve the correct two-way traffic prioritization
behavior during congestion.  In this example, once the SLA information
exchange is standardized, my expectation is that the different CE/PE vendors
would be able to automatically update in a vendor specific way, the SLA/QoS
policies based on the SLA information provided via BGP.  

 

Luis

 

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com] 
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com>; 'Ron Bonica' <rbonica@juniper.net>;
rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Hi Sue,

 

Following is what I had responded to Ron. Hopefully that
addresses/clarifies.

 

To break it down in two point response,

 

1) This draft is not changing how SLA is established at first place. The
draft is providing a method to convey this a priori established SLA to help
reduce lot of manual complexities and errors to admin. Thus given a
knowledge of what SLA is established, in general devices should be capable
to support that established SLA.

 

 

2) If there still are any issues in implementing exchanged SLA in
forwarding, we think they either are implementation specific or of temporary
nature where for example enough resources not available at any specific
point of a time.

 

We feel that in current state of the draft, it can be largely useful in
deployments.

 

 

 

One can imagine though even establishment of SLA also can be done via
exchanging it over bgp. However, negotiation of SLA does not have to be
clubbed with exchange of SLA. Negotiation of SLA is not in this scope.

 

Regards,

Shitanshu

 

  _____  

From: Susan Hares <shares@ndzh.com>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10 

 

Shitanshu: 

 

Please address Ron's comment about widely deployed.  I believe this was part
of Alvaro's comments. 

 

Sue 

 

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Hello,

 

The draft is internally consistent. But given what is left out of scope, I
wonder if the new attributes will ever be widely deployed.

 

 
Ron

 

 


This document might benefit from discussion of operational issues. I assume
that when a BGP listener learns a route with the SLA Exchange Attribute, it
provisions class of service forwarding classes on interfaces.

 

##svshah, though this is one desired use of exchanging SLA content, the
draft focuses on transporting SLA content from the SLA Producer to the SLA
Consumer. Processing of the QoS attribute content, at the SLA Consumer, is
outside the scope of this document.

 

##svshah, Let me know if you have a suggestion to make description clearer
in Section 1 and 2 to highlight this.

 

 

I also assume that a) it takes time to provision class of service forwarding
classes and b) the number of forwarding classes that can be provisioned are
finite. What does the BGP listener do when the number of forwarding classes
requested exceeds its capacity to deliver? 

 

##svshah, Since scope of the document is to transport SLA content from the
SLA Producer to the SLA Consumer, the document considers error handling in
the context of transporting data and thus any formating errors and semantics
errors within that context. Any errors in the context of processing QoS
attribute content at the SLA Consumer is outside the scope of the document.

 

 

 


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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Luis: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you for letting me know you desire for this feature.&nbsp; =
&nbsp;Since Ron had additional questions, I&#8217;ll let him start off =
this discussion. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Tomotaki, Luis =
M<br><b>Sent:</b> Tuesday, March 7, 2017 11:11 PM<br><b>To:</b> =
Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org; =
draft-ietf-idr-sla-exchange.all@ietf.org; =
idr@ietf.org<br><b>Subject:</b> Re: [Idr] [RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Ron and Sue,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>From a service provider perspective, exchanging the SLA information =
between the PE and CE would be very beneficial and could be widely =
used.&nbsp; I think this is particular important in service =
provider&#8217;s L3VPN networks where the customers or service providers =
currently do not have full visibility to the QoS policy in the other end =
of the connection but still needs matching CE-PE SLA/QoS policies to =
achieve the correct two-way traffic prioritization behavior during =
congestion.&nbsp; In this example, once the SLA information exchange is =
standardized, my expectation is that the different CE/PE vendors would =
be able to automatically update in a vendor specific way, the SLA/QoS =
policies based on the SLA information provided via BGP.&nbsp; =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Luis<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> Shitanshu =
Shah [<a =
href=3D"mailto:shitanshu_shah@hotmail.com">mailto:shitanshu_shah@hotmail.=
com</a>] <br><b>Sent:</b> Monday, March 6, 2017 9:31 AM<br><b>To:</b> =
Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;; 'Ron Bonica' =
&lt;<a href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net</a>&gt;; =
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> [E] Re: =
[RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div =
id=3Ddivtagdefaultwrapper><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Hi =
Sue,<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Following is =
what I had responded to Ron. Hopefully&nbsp;that =
addresses/clarifies.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>To break it =
down in two point response,<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>1) This draft =
is not changing how SLA is established at first place. The draft&nbsp;is =
providing a method to convey this a priori established&nbsp;SLA to help =
reduce lot of manual complexities and errors to admin. Thus given a =
knowledge of what SLA is established, in general devices should be =
capable to support that =
established&nbsp;SLA.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>2) If there =
still are any issues in implementing exchanged SLA in forwarding, we =
think they either are implementation specific or&nbsp;of temporary =
nature where for example enough resources not available at any specific =
point of a time.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>We feel that in =
current state of the draft, it can be largely useful in =
deployments.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>One can imagine =
though even establishment of SLA also can&nbsp;be done via exchanging it =
over bgp. However, negotiation of SLA does not have to be clubbed with =
exchange of SLA. Negotiation of SLA is not in this =
scope.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Regards,<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Shitanshu<o:p></=
o:p></span></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><div><div class=3DMsoNormal align=3Dcenter =
style=3D'text-align:center'><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><hr size=3D2 =
width=3D"98%" align=3Dcenter></span></div><div id=3DdivRplyFwdMsg><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
> Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br><b>Sent:</b> =
Saturday, March 4, 2017 8:31 AM<br><b>To:</b> 'Ron Bonica'; 'Shitanshu =
Shah'; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> RE: =
[RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'> =
<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>&nbsp;<o:p></o:p=
></span></p></div></div><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Shitanshu: </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Please address Ron&#8217;s comment about widely deployed.&nbsp; I =
believe this was part of Alvaro&#8217;s comments. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue </span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
 rtg-dir [<a =
href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-dir-bounces@ietf.org<=
/a>] <b>On Behalf Of </b>Ron Bonica<br><b>Sent:</b> Thursday, February =
23, 2017 12:07 PM<br><b>To:</b> Shitanshu Shah; <a =
href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> Re: =
[RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</span><span =
style=3D'color:black'><o:p></o:p></span></p></div></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hello,</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The draft is internally consistent. But given what is left out of =
scope, I wonder if the new attributes will ever be widely =
deployed.</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><br>This document might benefit from discussion of operational issues. =
I assume that when a BGP listener learns a route with the SLA Exchange =
Attribute, it provisions class of service forwarding classes on =
interfaces.</span><span =
style=3D'color:black'><o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, though =
this is one desired use of exchanging SLA content, the draft focuses on =
transporting SLA content from the SLA Producer to the SLA Consumer. =
Processing of the QoS attribute content, at the SLA Consumer, is outside =
the scope of this document.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p style=3D'min-height:13px'><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>&nbsp;</span><spa=
n =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, Let me =
know if you have a suggestion to make description clearer in Section 1 =
and 2 to highlight this.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>I also assume that a) it takes time to provision class of service =
forwarding classes and b) the number of forwarding classes that can be =
provisioned are finite. What does the BGP listener do when the number of =
forwarding classes requested exceeds its capacity to =
deliver?&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, Since =
scope of the document is to transport SLA content from the SLA Producer =
to the SLA Consumer, the document considers error handling in the =
context of transporting data and thus any formating errors and semantics =
errors within that context. Any errors in the context of processing QoS =
attribute content at the SLA Consumer is outside the scope of the =
document.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>&nbsp;</span><spa=
n =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div></div></div></div></div=
></div></body></html>
------=_NextPart_000_0117_01D297F5.E7106A00--


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From: <bruno.decraene@orange.com>
To: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>, "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
Thread-Topic: Routing directorate review of draft-ietf-spring-segment-routing-central-epe-04
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From: Sami Boutros <sboutros@vmware.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>,  "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Date: Fri, 10 Mar 2017 02:50:40 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/m5rOuBMWrgRh9opPX2i1IeJfy3c>
Subject: Re: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Content-Description: draft-ietf-bess-evpn-vpws-11.txt
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From: "Hejia (Jia)" <hejia@huawei.com>
To: "rtg-ads@ietf.org" <rtg-ads@ietf.org>
Thread-Topic: Routing directorate review of draft-ietf-pals-vpls-pim-snooping-04.txt 
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Subject: [RTG-DIR] Routing directorate review of draft-ietf-pals-vpls-pim-snooping-04.txt
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--_000_735916399E11684EAF4EB4FB376B719551C9BE0Cszxema507mbschi_
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Hello,

I have been selected as the Routing Directorate reviewer for this draft. Th=
e Routing Directorate seeks to review all routing or routing-related drafts=
 as they pass through IETF last call and IESG review, and sometimes on spec=
ial request. The purpose of the review is to provide assistance to the Rout=
ing ADs. For more information about the Routing Directorate, please see ?ht=
tp://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir

Although these comments are primarily for the use of the Routing ADs, it wo=
uld be helpful if you could consider them along with any other IETF Last Ca=
ll comments that you receive, and strive to resolve them through discussion=
 or by updating the draft.

Document:draft-ietf-pals-vpls-pim-snooping-04.txt
Reviewer: Jia He
Review Date: 2017-03-10
IETF LC End Date: -
Intended Status: Informational

Summary:
This document is basically well written, the nits listed below are tiny whi=
ch in my opinion should not block further procedures.

Comments:
I found the examples in the appendix helped a lot to understand the procedu=
res of PIM snooping and PIM proxying for VPLS as described in this draft.

Major Issues:
No major issues found.

Minor Issues:
1) Section 1.1, beginning of Page 5,

"Notice that traffic is always sent on ports that have point-to-point
   connections to routers ot that are attached to a LAN on which there
   is a router, even those on which there are no snooped group
   memberships, because IGMP snooping alone can not determine if there
   are interested receivers beyond those routers."

I found this sentence difficult to read. It is recommended to reorganize th=
e sentence.


Nits:
1) Section 2.2.1, Page 7, s/MUSTforward/MUST forward
2) Sections 2.6.3 & 2.6.4, Figures 1 &2, add (PP) as the abbreviation after=
 Prune-Pend  similar to NoInfo r(NI) and Join (J)
3) Appendix B, Page 31, add "Figure 3" before the title "An example Network=
 for Triggering Assert"



B.R.
Jia

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10pt;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hello, </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I have been selected as the Rou=
ting Directorate reviewer for this draft. The Routing Directorate seeks to =
review all routing or routing-related drafts as they pass through IETF last=
 call and IESG review, and sometimes
 on special request. The purpose of the review is to provide assistance to =
the Routing ADs. For more information about the Routing Directorate, please=
 see ?http://trac.tools.ietf.org/area/<span class=3D"SpellE">rtg</span>/<sp=
an class=3D"SpellE">trac</span>/wiki/<span class=3D"SpellE">RtgDir</span>
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Although these comments are pri=
marily for the use of the Routing ADs, it would be helpful if you could con=
sider them along with any other IETF Last Call comments that you receive, a=
nd strive to resolve them through discussion
 or by updating the draft. </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Document:draft-ietf-pals-vpls-p=
im-snooping-04.txt
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Reviewer:&nbsp;Jia He&nbsp;</sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Review Date: 2017-03-10</span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span><span lang=3D"EN-US">IET=
F LC End Date:&nbsp;-
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Intended Status: Informational =
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Summary: </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This document is basically well=
 written,&nbsp;the nits listed below are tiny which in my opinion should no=
t&nbsp;block further procedures.&nbsp;</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span><span lang=3D"EN-US"></s=
pan><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Comments: </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I found the examples in the app=
endix helped a lot to understand the procedures&nbsp;of PIM snooping and PI=
M proxying for VPLS as described in this draft.</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Major Issues: </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">No major issues found.</span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Minor Issues: </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">1) Section 1.1, beginning of Pa=
ge 5,</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span><span lang=3D"EN-US"></s=
pan>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&quot;Notice that traffic is al=
ways sent on ports that have point-to-point<br>
&nbsp;&nbsp; connections to routers ot that are attached to a LAN on which =
there<br>
&nbsp;&nbsp; is a router, even those on which there are no snooped group<br=
>
&nbsp;&nbsp; memberships, because IGMP snooping alone can not determine if =
there<br>
&nbsp;&nbsp; are interested receivers beyond those routers.&quot;</span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I found this sentence difficult=
 to read. It&nbsp;is recommended to reorganize the sentence.
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Nits: </span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">1) Section 2.2.1, Page 7, s/MUS=
Tforward/MUST forward</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">2) Sections 2.6.3 &amp; 2.6.4, =
Figures 1 &amp;2, add (PP) as the abbreviation&nbsp;after Prune-Pend&nbsp; =
similar to NoInfo r(NI) and Join (J)</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">3) Appendix B, Page 31, add &qu=
ot;Figure 3&quot; before the title &quot;An example Network for Triggering =
Assert&quot;</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"></span>&nbsp;</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">B.R.</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Jia</span></p>
</div>
</div>
</body>
</html>

--_000_735916399E11684EAF4EB4FB376B719551C9BE0Cszxema507mbschi_--


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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/k3ea8vb-ITl7OvXi3HSEkdtWmCA>
Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Luis,

This discussion might require a slightly higher bandwidth channel. Feel fre=
e to call me whenever you get a chance.

                                                                 Ron
                                                                  571 203 1=
704


From: Susan Hares [mailto:shares@ndzh.com]
Sent: Wednesday, March 8, 2017 10:23 AM
To: EXT - luis.tomotaki@verizon.com <luis.tomotaki@verizon.com>; 'Shitanshu=
 Shah' <shitanshu_shah@hotmail.com>; Ron Bonica <rbonica@juniper.net>; rtg-=
dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Luis:

Thank you for letting me know you desire for this feature.   Since Ron had =
additional questions, I'll let him start off this discussion.

Sue

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Tomotaki, Luis M
Sent: Tuesday, March 7, 2017 11:11 PM
To: Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org<mailto:rtg-=
dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-i=
dr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Ron and Sue,
>From a service provider perspective, exchanging the SLA information between=
 the PE and CE would be very beneficial and could be widely used.  I think =
this is particular important in service provider's L3VPN networks where the=
 customers or service providers currently do not have full visibility to th=
e QoS policy in the other end of the connection but still needs matching CE=
-PE SLA/QoS policies to achieve the correct two-way traffic prioritization =
behavior during congestion.  In this example, once the SLA information exch=
ange is standardized, my expectation is that the different CE/PE vendors wo=
uld be able to automatically update in a vendor specific way, the SLA/QoS p=
olicies based on the SLA information provided via BGP.

Luis

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com]
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; 'Ron Bonica' <rb=
onica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto:rtg=
-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-=
idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10


Hi Sue,



Following is what I had responded to Ron. Hopefully that addresses/clarifie=
s.



To break it down in two point response,



1) This draft is not changing how SLA is established at first place. The dr=
aft is providing a method to convey this a priori established SLA to help r=
educe lot of manual complexities and errors to admin. Thus given a knowledg=
e of what SLA is established, in general devices should be capable to suppo=
rt that established SLA.





2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or of temporary nature =
where for example enough resources not available at any specific point of a=
 time.



We feel that in current state of the draft, it can be largely useful in dep=
loyments.







One can imagine though even establishment of SLA also can be done via excha=
nging it over bgp. However, negotiation of SLA does not have to be clubbed =
with exchange of SLA. Negotiation of SLA is not in this scope.


Regards,
Shitanshu

________________________________
From: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org<mailto:rtg-dir@ietf.or=
g>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exch=
ange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Shitanshu:

Please address Ron's comment about widely deployed.  I believe this was par=
t of Alvaro's comments.

Sue

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org<mailto:rtg-dir@ietf.org>; draft-ietf-i=
dr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exchange.all@ietf.or=
g>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hello,

The draft is internally consistent. But given what is left out of scope, I =
wonder if the new attributes will ever be widely deployed.

                                                                           =
     Ron



This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.


##svshah, though this is one desired use of exchanging SLA content, the dra=
ft focuses on transporting SLA content from the SLA Producer to the SLA Con=
sumer. Processing of the QoS attribute content, at the SLA Consumer, is out=
side the scope of this document.



##svshah, Let me know if you have a suggestion to make description clearer =
in Section 1 and 2 to highlight this.


I also assume that a) it takes time to provision class of service forwardin=
g classes and b) the number of forwarding classes that can be provisioned a=
re finite. What does the BGP listener do when the number of forwarding clas=
ses requested exceeds its capacity to deliver?


##svshah, Since scope of the document is to transport SLA content from the =
SLA Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and semantic=
s errors within that context. Any errors in the context of processing QoS a=
ttribute content at the SLA Consumer is outside the scope of the document.





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<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This discussion might require a sligh=
tly higher bandwidth channel. Feel free to call me whenever you get a chanc=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;571 203 1704<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbs=
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<span style=3D"mso-bookmark:_MailEndCompose"></span>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Susan Hares [mailto:shares@ndz=
h.com]
<br>
<b>Sent:</b> Wednesday, March 8, 2017 10:23 AM<br>
<b>To:</b> EXT - luis.tomotaki@verizon.com &lt;luis.tomotaki@verizon.com&gt=
;; 'Shitanshu Shah' &lt;shitanshu_shah@hotmail.com&gt;; Ron Bonica &lt;rbon=
ica@juniper.net&gt;; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf=
.org; idr@ietf.org<br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Thank you for letting me know you des=
ire for this feature.&nbsp; &nbsp;Since Ron had additional questions, I&#82=
17;ll let him start off this discussion.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Sue
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bounc=
es@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Tomotaki, Luis M<br>
<b>Sent:</b> Tuesday, March 7, 2017 11:11 PM<br>
<b>To:</b> Shitanshu Shah; Susan Hares; 'Ron Bonica'; <a href=3D"mailto:rtg=
-dir@ietf.org">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Ron and Sue,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">From a service provider perspective, =
exchanging the SLA information between the PE and CE would be very benefici=
al and could be widely used.&nbsp; I think this is
 particular important in service provider&#8217;s L3VPN networks where the =
customers or service providers currently do not have full visibility to the=
 QoS policy in the other end of the connection but still needs matching CE-=
PE SLA/QoS policies to achieve the correct
 two-way traffic prioritization behavior during congestion.&nbsp; In this e=
xample, once the SLA information exchange is standardized, my expectation i=
s that the different CE/PE vendors would be able to automatically update in=
 a vendor specific way, the SLA/QoS policies
 based on the SLA information provided via BGP.&nbsp; <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Shitanshu Shah [<a href=3D"mai=
lto:shitanshu_shah@hotmail.com">mailto:shitanshu_shah@hotmail.com</a>]
<br>
<b>Sent:</b> Monday, March 6, 2017 9:31 AM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.c=
om</a>&gt;; 'Ron Bonica' &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica=
@juniper.net</a>&gt;;
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-idr-sla-exchange.all@ietf.org">
draft-ietf-idr-sla-exchange.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.or=
g">idr@ietf.org</a><br>
<b>Subject:</b> [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchang=
e-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div id=3D"divtagdefaultwrapper">
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i Sue,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">F=
ollowing is what I had responded to Ron. Hopefully&nbsp;that addresses/clar=
ifies.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
o break it down in two point response,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">1=
) This draft is not changing how SLA is established at first place. The dra=
ft&nbsp;is providing a method to convey this a priori established&nbsp;SLA =
to help reduce lot of manual complexities and errors to
 admin. Thus given a knowledge of what SLA is established, in general devic=
es should be capable to support that established&nbsp;SLA.<o:p></o:p></span=
></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">2=
) If there still are any issues in implementing exchanged SLA in forwarding=
, we think they either are implementation specific or&nbsp;of temporary nat=
ure where for example enough resources not available
 at any specific point of a time.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">W=
e feel that in current state of the draft, it can be largely useful in depl=
oyments.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">O=
ne can imagine though even establishment of SLA also can&nbsp;be done via e=
xchanging it over bgp. However, negotiation of SLA does not have to be club=
bed with exchange of SLA. Negotiation of SLA is not
 in this scope.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Shitanshu<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Calibri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">
<hr size=3D"2" width=3D"98%" align=3D"center">
</span></div>
<div id=3D"divRplyFwdMsg">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Susan =
Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br>
<b>Sent:</b> Saturday, March 4, 2017 8:31 AM<br>
<b>To:</b> 'Ron Bonica'; 'Shitanshu Shah'; <a href=3D"mailto:rtg-dir@ietf.o=
rg">rtg-dir@ietf.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Shitanshu:
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Please address Ron&#8217;s comment about widely dep=
loyed.&nbsp; I believe this was part of Alvaro&#8217;s comments.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Sue
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> rtg-dir
 [<a href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-dir-bounces@ietf.o=
rg</a>] <b>
On Behalf Of </b>Ron Bonica<br>
<b>Sent:</b> Thursday, February 23, 2017 12:07 PM<br>
<b>To:</b> Shitanshu Shah; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf=
.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Hello,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The draft is internally consistent. But given what =
is left out of scope, I wonder if the new attributes
 will ever be widely deployed.</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black"><br>
This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
though this is one desired use of exchanging SLA content, the draft focuses=
 on transporting SLA content from the SLA Producer to the SLA Consumer. Pro=
cessing of the QoS attribute content,
 at the SLA Consumer, is outside the scope of this document.</span><span st=
yle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p><=
/span></p>
<p style=3D"min-height:13px"><span style=3D"font-size:8.5pt;font-family:Men=
lo;color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibri&quot;=
,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Let me know if you have a suggestion to make description clearer in Section=
 1 and 2 to highlight this.</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">I also assume that a) it takes time to provision clas=
s of service forwarding classes and b) the number
 of forwarding classes that can be provisioned are finite. What does the BG=
P listener do when the number of forwarding classes requested exceeds its c=
apacity to deliver?&nbsp;</span><span style=3D"color:black"><o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Since scope of the document is to transport SLA content from the SLA Produc=
er to the SLA Consumer, the document considers error handling in the contex=
t of transporting data and thus any
 formating errors and semantics errors within that context. Any errors in t=
he context of processing QoS attribute content at the SLA Consumer is outsi=
de the scope of the document.</span><span style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif;color:black"><o:p></o:p></span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-size:8.5pt;font-famil=
y:Menlo;color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Sami Boutros <sboutros@vmware.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
Thread-Index: AQHSlDuI/Ow9Knx4yEm0UAqeXGTsw6GM45SAgATD4oA=
Date: Sun, 12 Mar 2017 18:36:44 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/9qA-VQ3u4xt3F0wjeN-Vt4nPSQA>
Subject: Re: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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From: Sami Boutros <sboutros@vmware.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>,  "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
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Date: Sun, 12 Mar 2017 19:24:24 +0000
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Subject: Re: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Content-Description: draft-ietf-bess-evpn-vpws-11.txt
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, Sami Boutros <sboutros@vmware.com>,  "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: [bess] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sun, 12 Mar 2017 17:42:48 -0400
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To: Loa Andersson <loa@pi.nu>
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Subject: Re: [RTG-DIR] QA review of draft-ietf-trill-ecn-support
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Hi Loa,

The -02 version of draft-ietf-trill-ecn-support, just posted, included the
improvements we have discussed.

Thanks,
Donald
===============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com

On Sat, Jan 28, 2017 at 3:44 AM, Loa Andersson <loa@pi.nu> wrote:

> Donald,
>
> I'm pretty happy with your response on my comments. I think that the
> agreed updates will go a long way to improve readability of the
> document.
>
> /Loa
>
>
> On 2017-01-27 06:09, Donald Eastlake wrote:
>
>> Hi Loa,
>>
>> Thanks for your comments. See below
>>
>> On Sat, Jan 21, 2017 at 12:02 AM, Loa Andersson <loa@pi.nu> wrote:
>>
>>> Authors,
>>>
>>> I have been asked to do a Routing Area Directorate QA review of
>>> draft-ietf-trill-ecn-support.
>>>
>>> Caveat - I'm not a congestion control expert, and this will show up in
>>> my comments. The place where I ask for clarifications might be perfectly
>>> clear for a reader that is up to speed in the area.
>>>
>>> Summary:
>>>
>>> I think the document is on the right track, for a reader not an
>>> expert in the area there are a lot of abbreviations that are not
>>> properly expanded. I also think that it would be a good idea to more
>>> clearly make the the case why the document is needed (abstract
>>> and/or introduction).
>>>
>>> After a while I stop trying to distinguish between "Minor issues"
>>> and "Nits" and placed everything as Minor Issues. I guess I could
>>> have done everything as Nits :).
>>>
>>
>> OK :-)
>>
>> Other than the Comment/Minor Issues I find the document pretty solid,
>>>
>>
>> Thanks.
>>
>> though I sometimes found it hard to parse sentences.
>>> If you want I can take a look at that aspect once what is in this
>>> review has been addressed.
>>>
>>> Comments:
>>>
>>> Last paragraph of the Introduction
>>> ----------------------------------
>>>
>>>    Whichever RBridges do not support ECN, this
>>>    specification ensures congestion notification will propagate safely
>>>    to Destination because the packet will be dropped if explicit
>>>    congestion notification cannot be propagated and drop is itself an
>>>    implicit form of congestion notification.
>>>
>>> Is this logic really watertight? What if the packet is dropped because
>>> of a
>>> checksum error?
>>>
>>
>> I think the point of that paragraph is to overcome the presumption
>> many readers might have that ECN marking would be useless if the
>> Destination does not understand ECN marking.
>>
>> Major Issues:
>>>
>>>
>>> Minor Issues:
>>>
>>> Abstract
>>> --------
>>> I find the Abstract a bit meager, a little more context would be good.
>>>
>>>    Maybe lead with some short words about what ECN is good for.
>>>
>>> And maybe use this from the Introduction:
>>>
>>>    This specification provides for any ECN marking in the traffic at the
>>>    ingress to be copied into the TRILL Extension Header Flags Word. It
>>>    also enables congestion marking by a congested RBridge such as RBn or
>>>    RB1 above in the TRILL Header Extension Flags Word [RFC7179].
>>>
>>
>> OK. How about this:
>>
>>    Explicit congestion notification (ECN) allows a forwarding element
>>    to notify downstream devices, including the destination, of the
>>    onset of congestion without having to drop packets. This can
>>    improve network efficiency through better flow control without
>>    packet drops. This document extends ECN to TRILL switches,
>>    including integration with IP ECN, and provides for ECN marking in
>>    the TRILL Header Extension Flags Word (see RFC 7179).
>>
>> ECNencapGuide
>>> -------------
>>>
>>> This reference has expired, probably not a problem since Bob is a
>>> co-author of both documents.
>>>
>>> TRILL Header
>>> ------------
>>>
>>> Referred to in section in the Introduction, I think a reference would be
>>> good.
>>>
>>
>> OK.
>>
>> The ECN Specific Extended Header Flags
>>> --------------------------------------
>>>
>>> The pictures is less than intuitive, it took me quite some time de-code
>>> it.
>>> I did the following:
>>> Critical (?) flags
>>>  0 - CRHbH (no expansion found in document)
>>>  1 - CRItE (no expansion found in document)
>>>  2 - CRRsv (no expansion found in document)
>>>
>>> CHbH flags (Critical Hop by Hop flags - no expansion found in document)
>>>  3 - unassigned
>>>  4 - unassigned
>>>  5 - unassigned
>>>  6 - unassigned
>>>  7 - CRCAF (no expansion found in document)
>>>
>>> NCHbH flags = Non-Critical Hop-by-Hop flags
>>>  8 - NCCAF (no expansion found in document)
>>>  9 - unassigned
>>> 10 - unassigned
>>> 11 - unassigned
>>> -------------------------------------------
>>> 12 - ECN = Explicit Congestion Notification
>>> 13   (two bit flags)
>>> -------------------------------------------
>>>
>>> CRSV flags (no expansion found in document)
>>> -------------------------------------------
>>> 14 - Ext Hop Cnt (no expansion found in document)
>>> 15   three bit field
>>> 16
>>> ------------------------------------------
>>>
>>> NCRSV flags (no expansion found in document)
>>> 17 - unassigned
>>> 18 - unassigned
>>> 19 - unassigned
>>> 20 - unassigned
>>> ------------------------------------------
>>>
>>> CItE flags = Critical Ingress-to-Egress
>>> ------------------------------------------
>>> 21 - unassigned
>>> 22 - unassigned
>>> 23 - unassigned
>>> 24 - unassigned
>>> 25 - unassigned
>>> 26 - CCE = Critical Congestion Experienced
>>> ------------------------------------------
>>>
>>> NCItE flags = Non Critical Ingress-to-Egress
>>> --------------------------------------------
>>> 27 - Ext Clr (no expansion found in document)
>>> 28   two bit field
>>> --------------------------------------------
>>> 29 - unassigned
>>> 30 - unassigned
>>> 31 - unassigned
>>>
>>
>> I'm not sure how much explanation/definition needs to appear in this
>> document for bits that are irrelevant to the document. All of your "no
>> expansion found in document" comments are true and probably a bit more
>> should be said but the draft does, in connection with bits other than
>> those it specifies, say
>>
>>    See [RFC7780] and [RFC7179] for the meaning of the other
>>    bits.
>>
>> The format seems moderately clear and is the same as in Section 10.2
>> of RFC 7780. Adding a mention that the TRILL Header Extension Flags
>> Word is 32-bits and the bit numbers are across the top might
>> help. Also, for those wishing to see a more tabular presentation, a
>> pointer to the IANA Registry
>> http://www.iana.org/assignments/trill-parameters/trill-
>> parameters.xhtml#extended-header-flags
>> might help.
>>
>> Multi-bit flags
>>> ---------------
>>>
>>> In the context I've been active "flags" are one bit, if there are
>>> multiple
>>> bits they are called fields. I understand that in the context
>>> this is written there are multiple bit flags.
>>>
>>
>> At the beginning of Section 2, it says "a two-bit TRILL-ECN
>> field". Since the name of the TRILL Header "Extension Flags Word" is
>> now embedded in multiple RFCs, I don't think that should be changed
>> but I wouldn't have any problem reviewing the draft to see that
>> multi-bit regions of that 32-bit word are consistently referred to as
>> fields.
>>
>> Bit 11 and 12
>>> -------------
>>>
>>> Bit 11 and 12 has the following code points:
>>>
>>>           Binary  Name     Meaning
>>>           ------  -------  -----------------------------------
>>>             00     Not-ECT Not ECN-Capable Transport
>>>             01     ECT(1)  ECN-Capable Transport (1)
>>>             10     ECT(0)  ECN-Capable Transport (0)
>>>             11     NCCE    Non-Critical Congestion Experienced
>>>
>>>                     Table 1. TRILL-ECN Field Codepoints
>>>
>>> There is no good explanation what ECT(0) and ECT(1) means, even though
>>> it is (page 9) said that "ECT(1) as a lesser severity level, termed the
>>> Threshold-Marked (ThM) codepoint". It could be inferred that ECT(0) is
>>> a higher severity level, but this should be clearly spelled out.
>>>
>>
>> That distinction between ECT(0) and ECT(1) only applies if the PCN
>> variant of ECN is in use which is why the text you quote is in a
>> subsection of Section 4 (TRILL Support for ECN Variants). There is a
>> reference to RFC 6660 which talks about this. Perhaps we can make that
>> clearer.
>>
>> RFC 3168 does not make the distinction between ECT(0) and ECT(1), but
>>> says that it will be done in future RFCs; since this is about 3000 RFCs
>>> ago it might have happened but I couldn't find it. If this has been done
>>> I think a reference would be good.
>>>
>>
>> This distincition is in RFC 6660 on PCN (Pre-Congestion Notification).
>>
>> Code Point 0b11
>>> ---------------
>>> The text above Table 1 says:
>>> OLD
>>> "However codepoint 11 is called Non-Critical Congestion Experienced
>>> (NCCE)..."
>>> I think this should be:
>>> However code point 0b11 is called Non-Critical Congestion Experienced
>>> (NCCE)..."
>>>
>>
>> OK.
>>
>> The text further says that the code point is call NCCE to distinguish
>>> it from Congestion Experienced in IP. The question I have is why it is
>>> necessary to distinguish code point 0b11, but not 0b00, 0b01 and 0b10?
>>>
>>
>> Because the meaning of the other three code points is the same in
>> TRILL and IP.
>>
>> ECN SUpport
>>> -----------
>>>
>>> The first paragraph has "logically" at three places, what would be the
>>> difference if these "logically" are dropped?
>>>
>>
>> Probably not. I think that word was included to be careful not to
>> overly constrain the order of processing within a TRILL switch.
>>
>> First sentence in sectuion 3.1
>>> ------------------------------
>>>
>>> The sentence says:
>>> "The ingress behavior is as follows:"
>>>
>>> I would say
>>> "The behavior of an ingress RBridge is as follows:"
>>> or even
>>> "The behavior of an ingress RBridge MUST be as follows:"
>>>
>>
>> OK.
>>
>> cleared vs set to zero
>>> ----------------------
>>> The last sub-bullet in the first main bullet of section 3.1 says:
>>> "ensure the CCE flag is cleared to zero (Flags Word bit 26)." I would
>>> have used "cleared" or "swt to zero".
>>>
>>
>> I think "set to zero" is clearer.
>>
>> First line section 3,2
>>> ----------------------
>>> s/ahow/shown
>>> Caveat I normally don't English grammar reviews, but sometimes I can't
>>> stop
>>> myself :)
>>>
>>
>> OK.
>>
>> Second line first main bullet in section 3.2
>>> --------------------------------------------
>>>
>>> I prefer the format "guidelines in RFC 7567 [RFC7567]"
>>>
>>
>> I really don't see any benefit to that and I think "RFC xxxx
>> [RFCxxxx]" is not used in TRILL RFCs.
>>
>> Third sub-bullet in the third main bullet of section 3.2
>>> ---------------------------------------------------------
>>>
>>> It says:
>>> "+  set the TRILL-ECN field to Not-ECT (00);"
>>>
>>> Here you use "field" instead of "flag", which is fine, but the document
>>> should be consistent. Either:
>>> +  set the TRILL-ECN field to Not-ECT (0b00);
>>> or
>>> +  set the TRILL-ECN flag to Not-ECT (0b00);
>>>
>>
>> I agree with your earlier comment that "field" is generally better.
>>
>> Egress ECN Support
>>> ------------------
>>> First sentence:
>>>   "If the egress RBridge does not support ECN, it will ignore bits 12
>>>    and 13 of any Flags Word that is present, because it does not contain
>>>    any special ECN logic."
>>>
>>> in "it will ignore" what does "it" refer to?
>>>
>>> SHould it be:
>>>
>>>   "If the egress RBridge does not support ECN, the RBridge will ignore
>>>    the TRILL-ECN field (bits 12 and 13) if a Flags Word that is
>>>    present, because it has no ECN logic."
>>>
>>
>> Yes, although it might be even clearer in the first line to say
>> "... ECN, that RBridge will ..."
>>
>> TRILL Support for ECN Variants
>>> ------------------------------
>>> The second sentence of section four says:
>>>
>>>    Section 3 specifies interworking between TRILL and the original
>>>    standardized form of ECN in IP [RFC3168].
>>>
>>> RFC 3168 is updated by RFC 4301, RFC 6040, does section 3 relate to
>>> RFC 3168 or does the updates come into plan. IF the updates are in
>>> scope I think the sentence should say:
>>>
>>>    Section 3 specifies interworking between TRILL and the original
>>>    standardized form of ECN in IP RFC 3168 [RFC3168], and the updates
>>>    in RFC4310 [RFC4301] and RFC 6040 [6040].
>>>
>>
>> Interestingly, although RFC Editor meta-data consistencly shows RFC
>> 4301 as updating RFC 3168, this is not indicated on the first page of
>> RFC 4301. While ECN is mentioned a number of times in RFC 4301 and
>> that RFC could be viewed as extending ECN, I'm not quite sure what, if
>> any, change RFC 4301 makes to the behavior standardized RFC in 3168.
>>
>> I'll look at this more closely but I think the text currently in the
>> draft is OK and need not refer to either RFC 4301 or RFC 6040.
>>
>> Nits:
>>>
>>> Codepoints
>>> ----------
>>> at several places "codepoint(s)" I think the words IANA and the
>>> RFC Editor use is "code point(s)"
>>>
>>
>> While I didn't to an exhaustive search, everywhere I looked in the ECN
>> and PCN RFCs, "codepoint" is used so I would prefer to leave this
>> unchanged for now.
>>
>> Thanks,
>> Donald
>> ===============================
>>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>>  155 Beaver Street, Milford, MA 01757 USA
>>  d3e3e3@gmail.com
>>
>> /Loa
>>> --
>>>
>>> Loa Andersson                        email: loa@mail01.huawei.com
>>> Senior MPLS Expert                          loa@pi.nu
>>> Huawei Technologies (consultant)     phone: +46 739 81 21 64
>>>
>>
> --
>
>
> Loa Andersson                        email: loa@mail01.huawei.com
> Senior MPLS Expert                          loa@pi.nu
> Huawei Technologies (consultant)     phone: +46 739 81 21 64
>

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Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Hi Loa,<div><br></div><div>The -02 version of draft-ietf-t=
rill-ecn-support, just posted, included the improvements we have discussed.=
</div><div class=3D"gmail_extra"><br clear=3D"all"><div><div class=3D"gmail=
_signature" data-smartmail=3D"gmail_signature">Thanks,<br>Donald<br>=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D<br>=C2=A0Donald E. Eastlake 3rd =C2=A0 +1-508-333-2270 (cell)<=
br>=C2=A0155 Beaver Street, Milford, MA 01757 USA<br>=C2=A0<a href=3D"mailt=
o:d3e3e3@gmail.com" target=3D"_blank">d3e3e3@gmail.com</a></div></div>
<br><div class=3D"gmail_quote">On Sat, Jan 28, 2017 at 3:44 AM, Loa Anderss=
on <span dir=3D"ltr">&lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa=
@pi.nu</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Donald,<br>
<br>
I&#39;m pretty happy with your response on my comments. I think that the ag=
reed updates will go a long way to improve readability of the<br>
document.<span class=3D"HOEnZb"><font color=3D"#888888"><br>
<br>
/Loa</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>
<br>
On 2017-01-27 06:09, Donald Eastlake wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Hi Loa,<br>
<br>
Thanks for your comments. See below<br>
<br>
On Sat, Jan 21, 2017 at 12:02 AM, Loa Andersson &lt;<a href=3D"mailto:loa@p=
i.nu" target=3D"_blank">loa@pi.nu</a>&gt; wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Authors,<br>
<br>
I have been asked to do a Routing Area Directorate QA review of<br>
draft-ietf-trill-ecn-support.<br>
<br>
Caveat - I&#39;m not a congestion control expert, and this will show up in<=
br>
my comments. The place where I ask for clarifications might be perfectly<br=
>
clear for a reader that is up to speed in the area.<br>
<br>
Summary:<br>
<br>
I think the document is on the right track, for a reader not an<br>
expert in the area there are a lot of abbreviations that are not<br>
properly expanded. I also think that it would be a good idea to more<br>
clearly make the the case why the document is needed (abstract<br>
and/or introduction).<br>
<br>
After a while I stop trying to distinguish between &quot;Minor issues&quot;=
<br>
and &quot;Nits&quot; and placed everything as Minor Issues. I guess I could=
<br>
have done everything as Nits :).<br>
</blockquote>
<br>
OK :-)<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Other than the Comment/Minor Issues I find the document pretty solid,<br>
</blockquote>
<br>
Thanks.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
though I sometimes found it hard to parse sentences.<br>
If you want I can take a look at that aspect once what is in this<br>
review has been addressed.<br>
<br>
Comments:<br>
<br>
Last paragraph of the Introduction<br>
------------------------------<wbr>----<br>
<br>
=C2=A0 =C2=A0Whichever RBridges do not support ECN, this<br>
=C2=A0 =C2=A0specification ensures congestion notification will propagate s=
afely<br>
=C2=A0 =C2=A0to Destination because the packet will be dropped if explicit<=
br>
=C2=A0 =C2=A0congestion notification cannot be propagated and drop is itsel=
f an<br>
=C2=A0 =C2=A0implicit form of congestion notification.<br>
<br>
Is this logic really watertight? What if the packet is dropped because of a=
<br>
checksum error?<br>
</blockquote>
<br>
I think the point of that paragraph is to overcome the presumption<br>
many readers might have that ECN marking would be useless if the<br>
Destination does not understand ECN marking.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Major Issues:<br>
<br>
<br>
Minor Issues:<br>
<br>
Abstract<br>
--------<br>
I find the Abstract a bit meager, a little more context would be good.<br>
<br>
=C2=A0 =C2=A0Maybe lead with some short words about what ECN is good for.<b=
r>
<br>
And maybe use this from the Introduction:<br>
<br>
=C2=A0 =C2=A0This specification provides for any ECN marking in the traffic=
 at the<br>
=C2=A0 =C2=A0ingress to be copied into the TRILL Extension Header Flags Wor=
d. It<br>
=C2=A0 =C2=A0also enables congestion marking by a congested RBridge such as=
 RBn or<br>
=C2=A0 =C2=A0RB1 above in the TRILL Header Extension Flags Word [RFC7179].<=
br>
</blockquote>
<br>
OK. How about this:<br>
<br>
=C2=A0 =C2=A0Explicit congestion notification (ECN) allows a forwarding ele=
ment<br>
=C2=A0 =C2=A0to notify downstream devices, including the destination, of th=
e<br>
=C2=A0 =C2=A0onset of congestion without having to drop packets. This can<b=
r>
=C2=A0 =C2=A0improve network efficiency through better flow control without=
<br>
=C2=A0 =C2=A0packet drops. This document extends ECN to TRILL switches,<br>
=C2=A0 =C2=A0including integration with IP ECN, and provides for ECN markin=
g in<br>
=C2=A0 =C2=A0the TRILL Header Extension Flags Word (see RFC 7179).<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
ECNencapGuide<br>
-------------<br>
<br>
This reference has expired, probably not a problem since Bob is a<br>
co-author of both documents.<br>
<br>
TRILL Header<br>
------------<br>
<br>
Referred to in section in the Introduction, I think a reference would be<br=
>
good.<br>
</blockquote>
<br>
OK.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
The ECN Specific Extended Header Flags<br>
------------------------------<wbr>--------<br>
<br>
The pictures is less than intuitive, it took me quite some time de-code it.=
<br>
I did the following:<br>
Critical (?) flags<br>
=C2=A00 - CRHbH (no expansion found in document)<br>
=C2=A01 - CRItE (no expansion found in document)<br>
=C2=A02 - CRRsv (no expansion found in document)<br>
<br>
CHbH flags (Critical Hop by Hop flags - no expansion found in document)<br>
=C2=A03 - unassigned<br>
=C2=A04 - unassigned<br>
=C2=A05 - unassigned<br>
=C2=A06 - unassigned<br>
=C2=A07 - CRCAF (no expansion found in document)<br>
<br>
NCHbH flags =3D Non-Critical Hop-by-Hop flags<br>
=C2=A08 - NCCAF (no expansion found in document)<br>
=C2=A09 - unassigned<br>
10 - unassigned<br>
11 - unassigned<br>
------------------------------<wbr>-------------<br>
12 - ECN =3D Explicit Congestion Notification<br>
13=C2=A0 =C2=A0(two bit flags)<br>
------------------------------<wbr>-------------<br>
<br>
CRSV flags (no expansion found in document)<br>
------------------------------<wbr>-------------<br>
14 - Ext Hop Cnt (no expansion found in document)<br>
15=C2=A0 =C2=A0three bit field<br>
16<br>
------------------------------<wbr>------------<br>
<br>
NCRSV flags (no expansion found in document)<br>
17 - unassigned<br>
18 - unassigned<br>
19 - unassigned<br>
20 - unassigned<br>
------------------------------<wbr>------------<br>
<br>
CItE flags =3D Critical Ingress-to-Egress<br>
------------------------------<wbr>------------<br>
21 - unassigned<br>
22 - unassigned<br>
23 - unassigned<br>
24 - unassigned<br>
25 - unassigned<br>
26 - CCE =3D Critical Congestion Experienced<br>
------------------------------<wbr>------------<br>
<br>
NCItE flags =3D Non Critical Ingress-to-Egress<br>
------------------------------<wbr>--------------<br>
27 - Ext Clr (no expansion found in document)<br>
28=C2=A0 =C2=A0two bit field<br>
------------------------------<wbr>--------------<br>
29 - unassigned<br>
30 - unassigned<br>
31 - unassigned<br>
</blockquote>
<br>
I&#39;m not sure how much explanation/definition needs to appear in this<br=
>
document for bits that are irrelevant to the document. All of your &quot;no=
<br>
expansion found in document&quot; comments are true and probably a bit more=
<br>
should be said but the draft does, in connection with bits other than<br>
those it specifies, say<br>
<br>
=C2=A0 =C2=A0See [RFC7780] and [RFC7179] for the meaning of the other<br>
=C2=A0 =C2=A0bits.<br>
<br>
The format seems moderately clear and is the same as in Section 10.2<br>
of RFC 7780. Adding a mention that the TRILL Header Extension Flags<br>
Word is 32-bits and the bit numbers are across the top might<br>
help. Also, for those wishing to see a more tabular presentation, a<br>
pointer to the IANA Registry<br>
<a href=3D"http://www.iana.org/assignments/trill-parameters/trill-parameter=
s.xhtml#extended-header-flags" rel=3D"noreferrer" target=3D"_blank">http://=
www.iana.org/assignment<wbr>s/trill-parameters/trill-<wbr>parameters.xhtml#=
extended-<wbr>header-flags</a><br>
might help.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Multi-bit flags<br>
---------------<br>
<br>
In the context I&#39;ve been active &quot;flags&quot; are one bit, if there=
 are multiple<br>
bits they are called fields. I understand that in the context<br>
this is written there are multiple bit flags.<br>
</blockquote>
<br>
At the beginning of Section 2, it says &quot;a two-bit TRILL-ECN<br>
field&quot;. Since the name of the TRILL Header &quot;Extension Flags Word&=
quot; is<br>
now embedded in multiple RFCs, I don&#39;t think that should be changed<br>
but I wouldn&#39;t have any problem reviewing the draft to see that<br>
multi-bit regions of that 32-bit word are consistently referred to as<br>
fields.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Bit 11 and 12<br>
-------------<br>
<br>
Bit 11 and 12 has the following code points:<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Binary=C2=A0 Name=C2=A0 =C2=A0 =C2=A0Mea=
ning<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ------=C2=A0 -------=C2=A0 -------------=
-----------------<wbr>-----<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 00=C2=A0 =C2=A0 =C2=A0Not-ECT Not=
 ECN-Capable Transport<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 01=C2=A0 =C2=A0 =C2=A0ECT(1)=C2=
=A0 ECN-Capable Transport (1)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 10=C2=A0 =C2=A0 =C2=A0ECT(0)=C2=
=A0 ECN-Capable Transport (0)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 11=C2=A0 =C2=A0 =C2=A0NCCE=C2=A0 =
=C2=A0 Non-Critical Congestion Experienced<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Table=
 1. TRILL-ECN Field Codepoints<br>
<br>
There is no good explanation what ECT(0) and ECT(1) means, even though<br>
it is (page 9) said that &quot;ECT(1) as a lesser severity level, termed th=
e<br>
Threshold-Marked (ThM) codepoint&quot;. It could be inferred that ECT(0) is=
<br>
a higher severity level, but this should be clearly spelled out.<br>
</blockquote>
<br>
That distinction between ECT(0) and ECT(1) only applies if the PCN<br>
variant of ECN is in use which is why the text you quote is in a<br>
subsection of Section 4 (TRILL Support for ECN Variants). There is a<br>
reference to RFC 6660 which talks about this. Perhaps we can make that<br>
clearer.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
RFC 3168 does not make the distinction between ECT(0) and ECT(1), but<br>
says that it will be done in future RFCs; since this is about 3000 RFCs<br>
ago it might have happened but I couldn&#39;t find it. If this has been don=
e<br>
I think a reference would be good.<br>
</blockquote>
<br>
This distincition is in RFC 6660 on PCN (Pre-Congestion Notification).<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Code Point 0b11<br>
---------------<br>
The text above Table 1 says:<br>
OLD<br>
&quot;However codepoint 11 is called Non-Critical Congestion Experienced<br=
>
(NCCE)...&quot;<br>
I think this should be:<br>
However code point 0b11 is called Non-Critical Congestion Experienced<br>
(NCCE)...&quot;<br>
</blockquote>
<br>
OK.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
The text further says that the code point is call NCCE to distinguish<br>
it from Congestion Experienced in IP. The question I have is why it is<br>
necessary to distinguish code point 0b11, but not 0b00, 0b01 and 0b10?<br>
</blockquote>
<br>
Because the meaning of the other three code points is the same in<br>
TRILL and IP.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
ECN SUpport<br>
-----------<br>
<br>
The first paragraph has &quot;logically&quot; at three places, what would b=
e the<br>
difference if these &quot;logically&quot; are dropped?<br>
</blockquote>
<br>
Probably not. I think that word was included to be careful not to<br>
overly constrain the order of processing within a TRILL switch.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
First sentence in sectuion 3.1<br>
------------------------------<br>
<br>
The sentence says:<br>
&quot;The ingress behavior is as follows:&quot;<br>
<br>
I would say<br>
&quot;The behavior of an ingress RBridge is as follows:&quot;<br>
or even<br>
&quot;The behavior of an ingress RBridge MUST be as follows:&quot;<br>
</blockquote>
<br>
OK.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
cleared vs set to zero<br>
----------------------<br>
The last sub-bullet in the first main bullet of section 3.1 says:<br>
&quot;ensure the CCE flag is cleared to zero (Flags Word bit 26).&quot; I w=
ould<br>
have used &quot;cleared&quot; or &quot;swt to zero&quot;.<br>
</blockquote>
<br>
I think &quot;set to zero&quot; is clearer.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
First line section 3,2<br>
----------------------<br>
s/ahow/shown<br>
Caveat I normally don&#39;t English grammar reviews, but sometimes I can&#3=
9;t stop<br>
myself :)<br>
</blockquote>
<br>
OK.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Second line first main bullet in section 3.2<br>
------------------------------<wbr>--------------<br>
<br>
I prefer the format &quot;guidelines in RFC 7567 [RFC7567]&quot;<br>
</blockquote>
<br>
I really don&#39;t see any benefit to that and I think &quot;RFC xxxx<br>
[RFCxxxx]&quot; is not used in TRILL RFCs.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Third sub-bullet in the third main bullet of section 3.2<br>
------------------------------<wbr>---------------------------<br>
<br>
It says:<br>
&quot;+=C2=A0 set the TRILL-ECN field to Not-ECT (00);&quot;<br>
<br>
Here you use &quot;field&quot; instead of &quot;flag&quot;, which is fine, =
but the document<br>
should be consistent. Either:<br>
+=C2=A0 set the TRILL-ECN field to Not-ECT (0b00);<br>
or<br>
+=C2=A0 set the TRILL-ECN flag to Not-ECT (0b00);<br>
</blockquote>
<br>
I agree with your earlier comment that &quot;field&quot; is generally bette=
r.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Egress ECN Support<br>
------------------<br>
First sentence:<br>
=C2=A0 &quot;If the egress RBridge does not support ECN, it will ignore bit=
s 12<br>
=C2=A0 =C2=A0and 13 of any Flags Word that is present, because it does not =
contain<br>
=C2=A0 =C2=A0any special ECN logic.&quot;<br>
<br>
in &quot;it will ignore&quot; what does &quot;it&quot; refer to?<br>
<br>
SHould it be:<br>
<br>
=C2=A0 &quot;If the egress RBridge does not support ECN, the RBridge will i=
gnore<br>
=C2=A0 =C2=A0the TRILL-ECN field (bits 12 and 13) if a Flags Word that is<b=
r>
=C2=A0 =C2=A0present, because it has no ECN logic.&quot;<br>
</blockquote>
<br>
Yes, although it might be even clearer in the first line to say<br>
&quot;... ECN, that RBridge will ...&quot;<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
TRILL Support for ECN Variants<br>
------------------------------<br>
The second sentence of section four says:<br>
<br>
=C2=A0 =C2=A0Section 3 specifies interworking between TRILL and the origina=
l<br>
=C2=A0 =C2=A0standardized form of ECN in IP [RFC3168].<br>
<br>
RFC 3168 is updated by RFC 4301, RFC 6040, does section 3 relate to<br>
RFC 3168 or does the updates come into plan. IF the updates are in<br>
scope I think the sentence should say:<br>
<br>
=C2=A0 =C2=A0Section 3 specifies interworking between TRILL and the origina=
l<br>
=C2=A0 =C2=A0standardized form of ECN in IP RFC 3168 [RFC3168], and the upd=
ates<br>
=C2=A0 =C2=A0in RFC4310 [RFC4301] and RFC 6040 [6040].<br>
</blockquote>
<br>
Interestingly, although RFC Editor meta-data consistencly shows RFC<br>
4301 as updating RFC 3168, this is not indicated on the first page of<br>
RFC 4301. While ECN is mentioned a number of times in RFC 4301 and<br>
that RFC could be viewed as extending ECN, I&#39;m not quite sure what, if<=
br>
any, change RFC 4301 makes to the behavior standardized RFC in 3168.<br>
<br>
I&#39;ll look at this more closely but I think the text currently in the<br=
>
draft is OK and need not refer to either RFC 4301 or RFC 6040.<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
Nits:<br>
<br>
Codepoints<br>
----------<br>
at several places &quot;codepoint(s)&quot; I think the words IANA and the<b=
r>
RFC Editor use is &quot;code point(s)&quot;<br>
</blockquote>
<br>
While I didn&#39;t to an exhaustive search, everywhere I looked in the ECN<=
br>
and PCN RFCs, &quot;codepoint&quot; is used so I would prefer to leave this=
<br>
unchanged for now.<br>
<br>
Thanks,<br>
Donald<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D<wbr>=3D<br>
=C2=A0Donald E. Eastlake 3rd=C2=A0 =C2=A0<a href=3D"tel:%2B1-508-333-2270" =
value=3D"+15083332270" target=3D"_blank">+1-508-333-2270</a> (cell)<br>
=C2=A0155 Beaver Street, Milford, MA 01757 USA<br>
=C2=A0<a href=3D"mailto:d3e3e3@gmail.com" target=3D"_blank">d3e3e3@gmail.co=
m</a><br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
/Loa<br>
--<br>
<br>
Loa Andersson=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 email: <a href=3D"mailto:loa@mail01.huawei.com" targe=
t=3D"_blank">loa@mail01.huawei.com</a><br>
Senior MPLS Expert=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"mailto:loa@pi.nu" target=3D"_=
blank">loa@pi.nu</a><br>
Huawei Technologies (consultant)=C2=A0 =C2=A0 =C2=A0phone: <a href=3D"tel:%=
2B46%20739%2081%2021%2064" value=3D"+46739812164" target=3D"_blank">+46 739=
 81 21 64</a><br>
</blockquote></blockquote>
<br>
-- <br>
<br>
<br>
Loa Andersson=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 email: <a href=3D"mailto:loa@mail01.huawei.com" targe=
t=3D"_blank">loa@mail01.huawei.com</a><br>
Senior MPLS Expert=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"mailto:loa@pi.nu" target=3D"_=
blank">loa@pi.nu</a><br>
Huawei Technologies (consultant)=C2=A0 =C2=A0 =C2=A0phone: <a href=3D"tel:%=
2B46%20739%2081%2021%2064" value=3D"+46739812164" target=3D"_blank">+46 739=
 81 21 64</a><br>
</div></div></blockquote></div><br></div></div>

--001a11408e4ec328e4054a8f7a39--


From nobody Mon Mar 13 02:30:16 2017
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Cc: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "pals@ietf.org" <pals@ietf.org>, "draft-ietf-pals-vpls-pim-snooping.all@ietf.org" <draft-ietf-pals-vpls-pim-snooping.all@ietf.org>
Subject: Re: [RTG-DIR] Routing directorate review of draft-ietf-pals-vpls-pim-snooping-04.txt
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Jia,

Thank you for you review.

I found all your remarks valid, I'll publish an updated version shortly.

Thanks,
Olivier.

On 03/12/2017 04:14 PM, Hejia (Jia) wrote:
>
> Hello,
>
> I have been selected as the Routing Directorate reviewer for this 
> draft. The Routing Directorate seeks to review all routing or 
> routing-related drafts as they pass through IETF last call and IESG 
> review, and sometimes on special request. The purpose of the review is 
> to provide assistance to the Routing ADs. For more information about 
> the Routing Directorate, please see 
> ?http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>
> Although these comments are primarily for the use of the Routing ADs, 
> it would be helpful if you could consider them along with any other 
> IETF Last Call comments that you receive, and strive to resolve them 
> through discussion or by updating the draft.
>
> Document:draft-ietf-pals-vpls-pim-snooping-04.txt
>
> Reviewer: Jia He
>
> Review Date: 2017-03-10
>
> IETF LC End Date: -
>
> Intended Status: Informational
>
> Summary:
>
> This document is basically well written, the nits listed below are 
> tiny which in my opinion should not block further procedures.
>
> Comments:
>
> I found the examples in the appendix helped a lot to understand the 
> procedures of PIM snooping and PIM proxying for VPLS as described in 
> this draft.
>
> Major Issues:
>
> No major issues found.
>
> Minor Issues:
>
> 1) Section 1.1, beginning of Page 5,
>
> "Notice that traffic is always sent on ports that have point-to-point
>    connections to routers ot that are attached to a LAN on which there
>    is a router, even those on which there are no snooped group
>    memberships, because IGMP snooping alone can not determine if there
>    are interested receivers beyond those routers."
>
> I found this sentence difficult to read. It is recommended to 
> reorganize the sentence.
>
> Nits:
>
> 1) Section 2.2.1, Page 7, s/MUSTforward/MUST forward
>
> 2) Sections 2.6.3 & 2.6.4, Figures 1 &2, add (PP) as the 
> abbreviation after Prune-Pend  similar to NoInfo r(NI) and Join (J)
>
> 3) Appendix B, Page 31, add "Figure 3" before the title "An example 
> Network for Triggering Assert"
>
> B.R.
>
> Jia
>


--------------040409070806010102080105
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      http-equiv="Content-Type">
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  <body text="#000000" bgcolor="#FFFFFF">
    Jia,<br>
    <br>
    Thank you for you review.<br>
    <br>
    I found all your remarks valid, I'll publish an updated version
    shortly.<br>
    <br>
    Thanks,<br>
    Olivier.<br>
    <br>
    <div class="moz-cite-prefix">On 03/12/2017 04:14 PM, Hejia (Jia)
      wrote:<br>
    </div>
    <blockquote
cite="mid:735916399E11684EAF4EB4FB376B719551C9BE0C@szxema507-mbs.china.huawei.com"
      type="cite">
      <meta http-equiv="Content-Type" content="text/html;
        charset=windows-1252">
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        <div class="WordSection1">
          <p class="MsoNormal"><span lang="EN-US">Hello, </span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">I have been selected
              as the Routing Directorate reviewer for this draft. The
              Routing Directorate seeks to review all routing or
              routing-related drafts as they pass through IETF last call
              and IESG review, and sometimes on special request. The
              purpose of the review is to provide assistance to the
              Routing ADs. For more information about the Routing
              Directorate, please see ?<a class="moz-txt-link-freetext" href="http://trac.tools.ietf.org/area/">http://trac.tools.ietf.org/area/</a><span
                class="SpellE">rtg</span>/<span class="SpellE">trac</span>/wiki/<span
                class="SpellE">RtgDir</span>
            </span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">Although these
              comments are primarily for the use of the Routing ADs, it
              would be helpful if you could consider them along with any
              other IETF Last Call comments that you receive, and strive
              to resolve them through discussion or by updating the
              draft. </span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">Document:draft-ietf-pals-vpls-pim-snooping-04.txt
            </span></p>
          <p class="MsoNormal"><span lang="EN-US">Reviewer: Jia He </span></p>
          <p class="MsoNormal"><span lang="EN-US">Review Date:
              2017-03-10</span></p>
          <p class="MsoNormal"><span lang="EN-US"></span><span
              lang="EN-US">IETF LC End Date: -
            </span></p>
          <p class="MsoNormal"><span lang="EN-US">Intended Status:
              Informational </span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">Summary: </span></p>
          <p class="MsoNormal"><span lang="EN-US">This document is
              basically well written, the nits listed below are tiny
              which in my opinion should not block further procedures. </span></p>
          <p class="MsoNormal"><span lang="EN-US"></span><span
              lang="EN-US"></span><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">Comments: </span></p>
          <p class="MsoNormal"><span lang="EN-US">I found the examples
              in the appendix helped a lot to understand the
              procedures of PIM snooping and PIM proxying for VPLS as
              described in this draft.</span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">Major Issues: </span></p>
          <p class="MsoNormal"><span lang="EN-US">No major issues found.</span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">Minor Issues: </span></p>
          <p class="MsoNormal"><span lang="EN-US">1) Section 1.1,
              beginning of Page 5,</span></p>
          <p class="MsoNormal"><span lang="EN-US"></span><span
              lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">"Notice that traffic
              is always sent on ports that have point-to-point<br>
                 connections to routers ot that are attached to a LAN on
              which there<br>
                 is a router, even those on which there are no snooped
              group<br>
                 memberships, because IGMP snooping alone can not
              determine if there<br>
                 are interested receivers beyond those routers."</span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">I found this sentence
              difficult to read. It is recommended to reorganize the
              sentence.
            </span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">Nits: </span></p>
          <p class="MsoNormal"><span lang="EN-US">1) Section 2.2.1, Page
              7, s/MUSTforward/MUST forward</span></p>
          <p class="MsoNormal"><span lang="EN-US">2) Sections 2.6.3
              &amp; 2.6.4, Figures 1 &amp;2, add (PP) as the
              abbreviation after Prune-Pend  similar to NoInfo r(NI) and
              Join (J)</span></p>
          <p class="MsoNormal"><span lang="EN-US">3) Appendix B, Page
              31, add "Figure 3" before the title "An example Network
              for Triggering Assert"</span></p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US"></span> </p>
          <p class="MsoNormal"><span lang="EN-US">B.R.</span></p>
          <p class="MsoNormal"><span lang="EN-US">Jia</span></p>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

--------------040409070806010102080105--


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To: Sami Boutros <sboutros@vmware.com>, "Acee Lindem (acee)" <acee@cisco.com>,  "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
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Subject: Re: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Rabadan, Jorge (Nokia - US)" <jorge.rabadan@nokia.com>, Sami Boutros <sboutros@vmware.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: [bess] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Date: Mon, 13 Mar 2017 14:44:22 +0000
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References: <D4DF046E.A0B7A%acee@cisco.com> <3954A93E-FA95-43DE-9CC5-40725C94C4A1@vmware.com> <D4EB020B.A1450%acee@cisco.com> <2F8E6D0C-D7C6-4693-901D-0EF2AC2D6224@vmware.com> <A9F382CB-F71A-46C6-96E8-FD00778A9E46@nokia.com>
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Subject: Re: [RTG-DIR] [bess] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Hi Jorge,=20

On 3/13/17, 9:04 AM, "BESS on behalf of Rabadan, Jorge (Nokia - US)"
<bess-bounces@ietf.org on behalf of jorge.rabadan@nokia.com> wrote:

>Sami,=20
>
>About this one:
>
>=B3  1. Why is receiving an extended community with both the P and B flags
>set treated as a withdrawal, while it is ignored for the case when both
>the P and B flags are clear?
>
>I agree both should be treated as a withdrawal, I will change the text.=B2
>
>
>[JORGE] Sami, please correct this:
>
>=B3If the PE receives a route with both B and P
>   clear, it MUST treat the route as a withdrawal from the sender PE.=B2
>
>As you have in the following paragraph, flags P=3DB=3D0 is perfectly valid=
:
>
>=B3In multihoming single-active scenario for a given VPWS service
>   instance, the DF election should result in the Primary-elected PE for
>   the VPWS service instance advertising the P Flag set and the B Flag
>   clear, the Backup elected PE should advertise the P Flag clear and
>   the B Flag set, ****and the rest of the PEs in the same ES should
>signal
>   both P and B Flags clear.****=B2

Yes - but during DF election, you=B9d want the former Primary or Backup
advertisement to relinquish their respective roles. Now, there a multiple
ways this could be accomplished and the -11 version on using the last
advertised Primary or Backup should also result in the correct behavior.
However, withdrawal would assure DF convergence as well as provide
consistent behavior for both P and B Flags set and P and B Flags clear.

Thanks,
Acee=20




>
>
>Let me know if I=B9m missing something please. Don=B9t want to hold the
>progress, but this is important.
>Thank you.
>Jorge
>
>
>
>On 3/12/17, 8:24 PM, "Sami Boutros" <sboutros@vmware.com> wrote:
>
>    Hi Acee,
>   =20
>    Please find attached document with all comments addresses, if all
>good will=20
>    Submit before the cut-off tomorrow.
>   =20
>    Please see comments inline.
>    On 3/12/17, 11:36 AM, "Acee Lindem (acee)" <acee@cisco.com> wrote:
>   =20
>   =20
>    >Hi Sami,=20
>    >
>    >I think this version reads much better. I still have a couple
>comments and
>    >questions.=20
>    >
>    >  1. Why is receiving an extended community with both the P and B
>flags
>    >set treated as a withdrawal, while it is ignored for the case when
>both
>    >the P and B flags are clear?
>   =20
>    I agree both should be treated as a withdrawal, I will change the
>text.
>   =20
>    >  2. A related question is if a route with both the P and B flags
>clear is
>    >ignored, won=B9t this break DF election described on the bottom of
>page 8?
>    >It says =B3the rest of the PEs in the same ES should single both the =
P
>and B
>    >Flags clear.=B2
>   =20
>    The DF election is between the PE(s) attached to the ES and has
>nothing to do=20
>    With the remote PE receiving the routes from the PE(s) attached to
>the ES.
>    The remote PE expect to receive one route with P Flag set and another
>route=20
>    With with B flag set from another PE, all other routes received from
>other PE(s)=20
>    Attached to the same ES are not needed, and hence can be treated as
>withdrawal
>    Of previous routes from those Pe(s).
>   =20
>    >=20
>    >  3. Also, during DF election, is it implementation specific which
>backup
>    >is chosen if multiple PEs advertise the B Flag set in their
>respective
>    >extended communities?
>   =20
>    The DF election MUST always result in one Backup and One primary,
>however=20
>    During transit more than one route with P or B Flags can be received.
>   =20
>    >Why isn=B9t it the last one similar to the primary PE
>    >selection?
>   =20
>    Ok, to be consistent, will change the text to have the remote PE
>select the=20
>    last advertising backup PE.
>   =20
>    >=20
>    >  4. Both VID and VLAN ID are used in the document. I didn=B9t
>research this
>    >but from the context it appears these are synonymous. If VID is
>used, I=B9d
>    >also add it to the =B3Terminology=B2 in 1.1.
>   =20
>    Ok.
>    >
>    >  A few more Nits:
>    >*** draft-ietf-bess-evpn-vpws-11.txt.orig	2017-03-12
>13:56:46.000000000
>    >-0400
>    >--- draft-ietf-bess-evpn-vpws-11.txt	2017-03-12 14:34:06.000000000
>-0400
>    >***************
>    >*** 153,163 ****
>    >     instance. As with the Ethernet Tag in standard EVPN, the VPWS
>service
>    >     instance identifier has uniqueness within an EVPN instance.
>    > =20
>    >!    For EVPN routes, the Ethernet Tag ID are set to zero for
>Port-based,
>    >!    VLAN-based, and VLAN-bundle interface mode and it is set to
>non-zero
>    >!    Ethernet tag ID for VLAN-aware bundle mode. Conversely, for
>EVPN-
>    >     VPWS, the Ethernet tag ID in the Ethernet A-D route MUST be set
>to a
>    >!    non-zero value for all four  service interface types.
>    > =20
>    >     In terms of route advertisement and MPLS label lookup behavior,
>EVPN-
>    >     VPWS resembles the VLAN-aware bundle mode of [RFC7432] such
>that when
>    >--- 153,163 ----
>    >     instance. As with the Ethernet Tag in standard EVPN, the VPWS
>service
>    >     instance identifier has uniqueness within an EVPN instance.
>    > =20
>    >!    For EVPN routes, the Ethernet Tag IDs are set to zero for
>Port-based,
>    >!    VLAN-based, and VLAN-bundle interface mode and set to non-zero
>    >!    Ethernet Tag IDs for VLAN-aware bundle mode. Conversely, for
>EVPN-
>    >     VPWS, the Ethernet tag ID in the Ethernet A-D route MUST be set
>to a
>    >!    non-zero value for all four service interface types.
>    > =20
>    >     In terms of route advertisement and MPLS label lookup behavior,
>EVPN-
>    >     VPWS resembles the VLAN-aware bundle mode of [RFC7432] such
>that when
>    >***************
>    >*** 181,188 ****
>    >     Ethernet frames are transported as is and the tags are not
>altered.
>    > =20
>    >     The MPLS label value in the Ethernet A-D route can be set to the
>    >!    VXLAN Network Identifier (VNI) for VxLAN encap, and this VNI
>may have
>    >!    a global scope or local scope per PE and may also be made equal
>to
>    >     the VPWS service instance identifier set in the Ethernet A-D
>route.
>    > =20
>    >     The Ethernet Segment identifier encoded in the Ethernet A-D
>per-EVI
>    >--- 181,188 ----
>    >     Ethernet frames are transported as is and the tags are not
>altered.
>    > =20
>    >     The MPLS label value in the Ethernet A-D route can be set to the
>    >!    VXLAN Network Identifier (VNI) for VXLAN encap, and this VNI
>may have
>    >!    a global scope or local scope per PE and may also be equal to
>    >     the VPWS service instance identifier set in the Ethernet A-D
>route.
>    > =20
>    >     The Ethernet Segment identifier encoded in the Ethernet A-D
>per-EVI
>    >***************
>    >*** 312,321 ****
>    > =20
>    >  2.3 VLAN-Aware Bundle Service Interface
>    > =20
>    >!    Contrary to EVPN, in EVPN-VPWS this service interface maps to
>VLAN-
>    >     based service interface (defined in section 2.1) and thus this
>    >     service interface is not used in EVPN-VPWS.  In other words, if
>one
>    >!    tries to define data-plane and control plane behavior for this
>    >     service interface, one would realize that it is the same as
>that of
>    >     VLAN-based service.
>    > =20
>    >--- 312,321 ----
>    > =20
>    >  2.3 VLAN-Aware Bundle Service Interface
>    > =20
>    >!    Contrary to EVPN, in EVPN-VPWS this service interface maps to a
>VLAN-
>    >     based service interface (defined in section 2.1) and thus this
>    >     service interface is not used in EVPN-VPWS.  In other words, if
>one
>    >!    tries to define data plane and control plane behavior for this
>    >     service interface, one would realize that it is the same as
>that of
>    >     VLAN-based service.
>    > =20
>    >***************
>    >*** 326,332 ****
>    >     signal VPWS services. The Ethernet Segment Identifier field is
>set to
>    >     the customer ES and the Ethernet Tag ID 32-bit field MUST be
>set to
>    >     the VPWS service instance identifier value. The VPWS service
>instance
>    >!    identifier value MAY be set to a 24-bit value, when 24-bit
>value is
>    >     used, it MUST be right aligned. For both EPL and EVPL services
>using
>    >     a given VPWS service instance, the pair of PEs instantiating
>that
>    >     VPWS service instance will each advertise a per-EVI Ethernet A-D
>    >--- 326,332 ----
>    >     signal VPWS services. The Ethernet Segment Identifier field is
>set to
>    >     the customer ES and the Ethernet Tag ID 32-bit field MUST be
>set to
>    >     the VPWS service instance identifier value. The VPWS service
>instance
>    >!    identifier value MAY be set to a 24-bit value and when a 24-bit
>value
>    >is
>    >     used, it MUST be right aligned. For both EPL and EVPL services
>using
>    >     a given VPWS service instance, the pair of PEs instantiating
>that
>    >     VPWS service instance will each advertise a per-EVI Ethernet A-D
>    >***************
>    >*** 354,361 ****
>    > =20
>    >  3.1 EVPN Layer 2 attributes extended community
>    > =20
>    >!    This draft proposes a new extended community [RFC4360], to be
>    >!    included with the per-EVI Ethernet A-D route. This attribute is
>    >     mandatory if multihoming is enabled.
>    > =20
>    >          +------------------------------------+
>    >--- 354,361 ----
>    > =20
>    >  3.1 EVPN Layer 2 attributes extended community
>    > =20
>    >!    This document defines an extended community [RFC4360], to be
>    >!    included with per-EVI Ethernet A-D routes. This attribute is
>    >     mandatory if multihoming is enabled.
>    > =20
>    >          +------------------------------------+
>    >***************
>    >*** 423,429 ****
>    > =20
>    >     In a multihoming all-active scenario, there is no DF election,
>and
>    >     all the PEs in the ES that are active and ready to forward
>traffic
>    >!    to/from the CE will set the P Flag. A remote PE will do
>per-flow load
>    >     balancing to the PEs that set the P Flag for the same Ethernet
>Tag
>    >     and ESI. The B Flag in control flags SHOULD NOT be set in the
>    >     multihoming all-active scenario and MUST be ignored by receiving
>    >--- 423,429 ----
>    > =20
>    >     In a multihoming all-active scenario, there is no DF election,
>and
>    >     all the PEs in the ES that are active and ready to forward
>traffic
>    >!    to/from the CE will set the P Flag. A remote PE will do
>per-flow load-
>    >     balancing to the PEs that set the P Flag for the same Ethernet
>Tag
>    >     and ESI. The B Flag in control flags SHOULD NOT be set in the
>    >     multihoming all-active scenario and MUST be ignored by receiving
>    >***************
>    >*** 493,499 ****
>    > =20
>    >     All PEs and ASBRs are enabled for the EVPN SAFI and exchange
>per-EVI
>    >     Ethernet A-D routes, one route per VPWS service instance.  For
>inter-
>    >!    AS option B, the ASBRs re-advertise these routes with NEXT_HOP
>    >     attribute set to their IP addresses as per [RFC4271]. The link
>    >     between the CE and the PE is either a C-tagged or S-tagged
>interface,
>    >     as described in [802.1Q], that can carry a single VLAN tag or
>two
>    >--- 493,499 ----
>    > =20
>    >     All PEs and ASBRs are enabled for the EVPN SAFI and exchange
>per-EVI
>    >     Ethernet A-D routes, one route per VPWS service instance.  For
>inter-
>    >!    AS option B, the ASBRs re-advertise these routes with the
>NEXT_HOP
>    >     attribute set to their IP addresses as per [RFC4271]. The link
>    >     between the CE and the PE is either a C-tagged or S-tagged
>interface,
>    >     as described in [802.1Q], that can carry a single VLAN tag or
>two
>    >***************
>    >*** 570,576 ****
>    >     Finally, EVPN may employ data plane egress link protection
>mechanisms
>    >     not available in VPWS. This can be done by the primary PE (on
>local
>    >     AC down) using the label advertised in the per-EVI Ethernet A-D
>route
>    >!    by the backup PE to encapsulate the traffic and direct it to
>backup
>    >     PE.
>    > =20
>    >  6 Failure Scenarios
>    >--- 570,576 ----
>    >     Finally, EVPN may employ data plane egress link protection
>mechanisms
>    >     not available in VPWS. This can be done by the primary PE (on
>local
>    >     AC down) using the label advertised in the per-EVI Ethernet A-D
>route
>    >!    by the backup PE to encapsulate the traffic and direct it to the
>    >backup
>    >     PE.
>    > =20
>    >  6 Failure Scenarios
>    >***************
>    >*** 592,600 ****
>    >     For a faster convergence in multi-homed scenarios with either
>Single-
>    >     Active Redundancy or All-active redundancy, a mass withdraw
>technique
>    >     is used. A PE previously advertising a per-ES Ethernet A-D
>route, can
>    >!    withdraw this route signaling to the remote PEs to switch all
>the
>    >     VPWS service instances associated with this multi-homed ES to
>the
>    >!    backup PE
>    > =20
>    >  7 Acknowledgements
>    > =20
>    >--- 592,600 ----
>    >     For a faster convergence in multi-homed scenarios with either
>Single-
>    >     Active Redundancy or All-active redundancy, a mass withdraw
>technique
>    >     is used. A PE previously advertising a per-ES Ethernet A-D
>route, can
>    >!    withdraw this route by signaling to the remote PEs to switch
>all the
>    >     VPWS service instances associated with this multi-homed ES to
>the
>    >!    backup PE.
>    > =20
>    >  7 Acknowledgements
>   =20
>    Thanks,
>   =20
>    Sami
>    >
>   =20
>
>_______________________________________________
>BESS mailing list
>BESS@ietf.org
>https://www.ietf.org/mailman/listinfo/bess


From nobody Mon Mar 13 07:46:58 2017
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From: Sami Boutros <sboutros@vmware.com>
To: "Rabadan, Jorge (Nokia - US)" <jorge.rabadan@nokia.com>, "Acee Lindem (acee)" <acee@cisco.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Subject: Re: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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From nobody Mon Mar 13 08:24:54 2017
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From: "Rabadan, Jorge (Nokia - US)" <jorge.rabadan@nokia.com>
To: Sami Boutros <sboutros@vmware.com>, "Acee Lindem (acee)" <acee@cisco.com>,  "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Date: Mon, 13 Mar 2017 15:24:43 +0000
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References: <D4DF046E.A0B7A%acee@cisco.com> <3954A93E-FA95-43DE-9CC5-40725C94C4A1@vmware.com> <D4EB020B.A1450%acee@cisco.com> <2F8E6D0C-D7C6-4693-901D-0EF2AC2D6224@vmware.com> <A9F382CB-F71A-46C6-96E8-FD00778A9E46@nokia.com> <C119CFBA-D7D2-49D0-9DEF-3345E752F259@vmware.com>
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Subject: Re: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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From nobody Mon Mar 13 09:39:07 2017
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From: Sami Boutros <sboutros@vmware.com>
To: "Rabadan, Jorge (Nokia - US)" <jorge.rabadan@nokia.com>, "Acee Lindem (acee)" <acee@cisco.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
Thread-Index: AQHSlDuI/Ow9Knx4yEm0UAqeXGTsw6GM45SAgATD4oD//4dBgIABrjyA//+WhICAAJCxgP//jqmA
Date: Mon, 13 Mar 2017 16:38:58 +0000
Message-ID: <3E103056-7E56-4DC6-BA09-0DE906B4D8AC@vmware.com>
References: <D4DF046E.A0B7A%acee@cisco.com> <3954A93E-FA95-43DE-9CC5-40725C94C4A1@vmware.com> <D4EB020B.A1450%acee@cisco.com> <2F8E6D0C-D7C6-4693-901D-0EF2AC2D6224@vmware.com> <A9F382CB-F71A-46C6-96E8-FD00778A9E46@nokia.com> <C119CFBA-D7D2-49D0-9DEF-3345E752F259@vmware.com> <C1500DF7-FCB0-4FA8-996C-E5D0610D15BF@nokia.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/BM87m8m9cdyfowBxGQHw_cKFkrY>
Subject: Re: [RTG-DIR] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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From: "Shah, Himanshu" <hshah@ciena.com>
To: Sami Boutros <sboutros@vmware.com>, "Rabadan, Jorge (Nokia - US)" <jorge.rabadan@nokia.com>, "Acee Lindem (acee)" <acee@cisco.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>, "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: [bess] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Date: Mon, 13 Mar 2017 16:51:31 +0000
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Subject: Re: [RTG-DIR] [bess] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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From: "Rabadan, Jorge (Nokia - US)" <jorge.rabadan@nokia.com>
To: "Shah, Himanshu" <hshah@ciena.com>, Sami Boutros <sboutros@vmware.com>, "Acee Lindem (acee)" <acee@cisco.com>, "bess@ietf.org" <bess@ietf.org>, Routing ADs <rtg-ads@tools.ietf.org>, Routing Directorate <rtg-dir@ietf.org>,  "draft-ietf-bess-evpn-vpws@ietf.org" <draft-ietf-bess-evpn-vpws@ietf.org>
Thread-Topic: [bess] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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Date: Mon, 13 Mar 2017 17:03:37 +0000
Message-ID: <FF6D91E2-A35D-41B7-932D-95587D13A6DC@nokia.com>
References: <D4DF046E.A0B7A%acee@cisco.com> <3954A93E-FA95-43DE-9CC5-40725C94C4A1@vmware.com> <D4EB020B.A1450%acee@cisco.com> <2F8E6D0C-D7C6-4693-901D-0EF2AC2D6224@vmware.com> <A9F382CB-F71A-46C6-96E8-FD00778A9E46@nokia.com> <C119CFBA-D7D2-49D0-9DEF-3345E752F259@vmware.com> <C1500DF7-FCB0-4FA8-996C-E5D0610D15BF@nokia.com> <3E103056-7E56-4DC6-BA09-0DE906B4D8AC@vmware.com> <C3F816AD-65C8-4BED-9E44-59C0DDF78267@ciena.com>
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Subject: Re: [RTG-DIR] [bess] Routing Directorate Review for draft-ietf-bess-evpn-vpws-10
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To: Ron Bonica <rbonica@juniper.net>, Susan Hares <shares@ndzh.com>, 'Shitanshu Shah' <shitanshu_shah@hotmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Date: Tue, 14 Mar 2017 12:52:43 -0400
Thread-Topic: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Hi Ron,
Are you available for a quick call on Thursday at 10AM CT?

Luis

From: Ron Bonica [mailto:rbonica@juniper.net]
Sent: Sunday, March 12, 2017 11:11 AM
To: Susan Hares <shares@ndzh.com>; Tomotaki, Luis M <luis.tomotaki@one.veri=
zon.com>; 'Shitanshu Shah' <shitanshu_shah@hotmail.com>; rtg-dir@ietf.org; =
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: [E] RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange=
-10

Luis,

This discussion might require a slightly higher bandwidth channel. Feel fre=
e to call me whenever you get a chance.

                                                                 Ron
                                                                  571 203 1=
704


From: Susan Hares [mailto:shares@ndzh.com]
Sent: Wednesday, March 8, 2017 10:23 AM
To: EXT - luis.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com> <luis=
.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com>>; 'Shitanshu Shah' =
<shitanshu_shah@hotmail.com<mailto:shitanshu_shah@hotmail.com>>; Ron Bonica=
 <rbonica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto=
:rtg-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-i=
etf-idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Luis:

Thank you for letting me know you desire for this feature.   Since Ron had =
additional questions, I'll let him start off this discussion.

Sue

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Tomotaki, Luis M
Sent: Tuesday, March 7, 2017 11:11 PM
To: Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org<mailto:rtg-=
dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-i=
dr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Ron and Sue,
>From a service provider perspective, exchanging the SLA information between=
 the PE and CE would be very beneficial and could be widely used.  I think =
this is particular important in service provider's L3VPN networks where the=
 customers or service providers currently do not have full visibility to th=
e QoS policy in the other end of the connection but still needs matching CE=
-PE SLA/QoS policies to achieve the correct two-way traffic prioritization =
behavior during congestion.  In this example, once the SLA information exch=
ange is standardized, my expectation is that the different CE/PE vendors wo=
uld be able to automatically update in a vendor specific way, the SLA/QoS p=
olicies based on the SLA information provided via BGP.

Luis

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com]
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; 'Ron Bonica' <rb=
onica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto:rtg=
-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-=
idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10


Hi Sue,



Following is what I had responded to Ron. Hopefully that addresses/clarifie=
s.



To break it down in two point response,



1) This draft is not changing how SLA is established at first place. The dr=
aft is providing a method to convey this a priori established SLA to help r=
educe lot of manual complexities and errors to admin. Thus given a knowledg=
e of what SLA is established, in general devices should be capable to suppo=
rt that established SLA.





2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or of temporary nature =
where for example enough resources not available at any specific point of a=
 time.



We feel that in current state of the draft, it can be largely useful in dep=
loyments.







One can imagine though even establishment of SLA also can be done via excha=
nging it over bgp. However, negotiation of SLA does not have to be clubbed =
with exchange of SLA. Negotiation of SLA is not in this scope.


Regards,
Shitanshu

________________________________
From: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org<mailto:rtg-dir@ietf.or=
g>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exch=
ange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Shitanshu:

Please address Ron's comment about widely deployed.  I believe this was par=
t of Alvaro's comments.

Sue

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org<mailto:rtg-dir@ietf.org>; draft-ietf-i=
dr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exchange.all@ietf.or=
g>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hello,

The draft is internally consistent. But given what is left out of scope, I =
wonder if the new attributes will ever be widely deployed.

                                                                           =
     Ron



This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.


##svshah, though this is one desired use of exchanging SLA content, the dra=
ft focuses on transporting SLA content from the SLA Producer to the SLA Con=
sumer. Processing of the QoS attribute content, at the SLA Consumer, is out=
side the scope of this document.



##svshah, Let me know if you have a suggestion to make description clearer =
in Section 1 and 2 to highlight this.


I also assume that a) it takes time to provision class of service forwardin=
g classes and b) the number of forwarding classes that can be provisioned a=
re finite. What does the BGP listener do when the number of forwarding clas=
ses requested exceeds its capacity to deliver?


##svshah, Since scope of the document is to transport SLA content from the =
SLA Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and semantic=
s errors within that context. Any errors in the context of processing QoS a=
ttribute content at the SLA Consumer is outside the scope of the document.





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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
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<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3D"#0563C1=
" vlink=3D"#954F72"><div class=3DWordSection1><p class=3DMsoNormal><span st=
yle=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hi =
Ron, <o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11=
.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Are you available for =
a quick call on Thursday at 10AM CT?<o:p></o:p></span></p><p class=3DMsoNor=
mal><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:=
#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'fo=
nt-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Luis<o:p></o=
:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-fam=
ily:"Calibri",sans-serif;color:#1F497D'><o:p>&nbsp;</o:p></span></p><div><d=
iv style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0i=
n 0in'><p class=3DMsoNormal><b><span style=3D'font-size:11.0pt;font-family:=
"Calibri",sans-serif'>From:</span></b><span style=3D'font-size:11.0pt;font-=
family:"Calibri",sans-serif'> Ron Bonica [mailto:rbonica@juniper.net] <br><=
b>Sent:</b> Sunday, March 12, 2017 11:11 AM<br><b>To:</b> Susan Hares &lt;s=
hares@ndzh.com&gt;; Tomotaki, Luis M &lt;luis.tomotaki@one.verizon.com&gt;;=
 'Shitanshu Shah' &lt;shitanshu_shah@hotmail.com&gt;; rtg-dir@ietf.org; dra=
ft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org<br><b>Subject:</b> [E] =
RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10<o:p></o:p=
></span></p></div></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=
=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-ser=
if;color:#1F497D'>Luis,<o:p></o:p></span></p><p class=3DMsoNormal><span sty=
le=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p=
>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0p=
t;font-family:"Calibri",sans-serif;color:#1F497D'>This discussion might req=
uire a slightly higher bandwidth channel. Feel free to call me whenever you=
 get a chance.<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'fon=
t-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p>&nbsp;</=
o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-fa=
mily:"Calibri",sans-serif;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></p=
><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri"=
,sans-serif;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;571 203 1704<o:p></o:p></span></=
p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri=
",sans-serif;color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNorma=
l><a name=3D"_MailEndCompose"><span style=3D'font-size:11.0pt;font-family:"=
Calibri",sans-serif;color:#1F497D'><o:p>&nbsp;</o:p></span></a></p><div sty=
le=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><=
div><div style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt =
0in 0in 0in'><p class=3DMsoNormal><b><span style=3D'font-size:11.0pt;font-f=
amily:"Calibri",sans-serif'>From:</span></b><span style=3D'font-size:11.0pt=
;font-family:"Calibri",sans-serif'> Susan Hares [<a href=3D"mailto:shares@n=
dzh.com">mailto:shares@ndzh.com</a>] <br><b>Sent:</b> Wednesday, March 8, 2=
017 10:23 AM<br><b>To:</b> EXT - <a href=3D"mailto:luis.tomotaki@verizon.co=
m">luis.tomotaki@verizon.com</a> &lt;<a href=3D"mailto:luis.tomotaki@verizo=
n.com">luis.tomotaki@verizon.com</a>&gt;; 'Shitanshu Shah' &lt;<a href=3D"m=
ailto:shitanshu_shah@hotmail.com">shitanshu_shah@hotmail.com</a>&gt;; Ron B=
onica &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net</a>&gt=
;; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mai=
lto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-sla-exchange.a=
ll@ietf.org</a>; <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Sub=
ject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
<o:p></o:p></span></p></div></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p=
><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri"=
,sans-serif;color:#1F497D'>Luis: <o:p></o:p></span></p><p class=3DMsoNormal=
><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F=
497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-=
size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Thank you for l=
etting me know you desire for this feature.&nbsp; &nbsp;Since Ron had addit=
ional questions, I&#8217;ll let him start off this discussion. <o:p></o:p><=
/span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:=
"Calibri",sans-serif;color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3D=
MsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;=
color:#1F497D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span style=
=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p>&=
nbsp;</o:p></span></p><div><div style=3D'border:none;border-top:solid #B5C4=
DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span style=3D'=
font-size:10.0pt;font-family:"Tahoma",sans-serif'>From:</span></b><span sty=
le=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif'> Idr [<a href=3D"ma=
ilto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>] <b>On Behalf Of=
 </b>Tomotaki, Luis M<br><b>Sent:</b> Tuesday, March 7, 2017 11:11 PM<br><b=
>To:</b> Shitanshu Shah; Susan Hares; 'Ron Bonica'; <a href=3D"mailto:rtg-d=
ir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exc=
hange.all@ietf.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>; <a href=
=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> Re: [Idr] [RTG=
-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></=
div></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><s=
pan style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497=
D'>Ron and Sue,<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'fo=
nt-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>From a servi=
ce provider perspective, exchanging the SLA information between the PE and =
CE would be very beneficial and could be widely used.&nbsp; I think this is=
 particular important in service provider&#8217;s L3VPN networks where the =
customers or service providers currently do not have full visibility to the=
 QoS policy in the other end of the connection but still needs matching CE-=
PE SLA/QoS policies to achieve the correct two-way traffic prioritization b=
ehavior during congestion.&nbsp; In this example, once the SLA information =
exchange is standardized, my expectation is that the different CE/PE vendor=
s would be able to automatically update in a vendor specific way, the SLA/Q=
oS policies based on the SLA information provided via BGP.&nbsp; <o:p></o:p=
></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-famil=
y:"Calibri",sans-serif;color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=
=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-ser=
if;color:#1F497D'>Luis<o:p></o:p></span></p><p class=3DMsoNormal><span styl=
e=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p>=
&nbsp;</o:p></span></p><div><div style=3D'border:none;border-top:solid #E1E=
1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span style=3D=
'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span s=
tyle=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> Shitanshu Shah =
[<a href=3D"mailto:shitanshu_shah@hotmail.com">mailto:shitanshu_shah@hotmai=
l.com</a>] <br><b>Sent:</b> Monday, March 6, 2017 9:31 AM<br><b>To:</b> Sus=
an Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;; 'R=
on Bonica' &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net</=
a>&gt;; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=
=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-sla-exc=
hange.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br=
><b>Subject:</b> [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchan=
ge-10<o:p></o:p></span></p></div></div><p class=3DMsoNormal><o:p>&nbsp;</o:=
p></p><div id=3Ddivtagdefaultwrapper><p><span style=3D'font-family:"Calibri=
",sans-serif;color:black'>Hi Sue,<o:p></o:p></span></p><p><span style=3D'fo=
nt-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p>=
<span style=3D'font-family:"Calibri",sans-serif;color:black'>Following is w=
hat I had responded to Ron. Hopefully&nbsp;that addresses/clarifies.<o:p></=
o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:bla=
ck'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-family:"Calibri",san=
s-serif;color:black'>To break it down in two point response,<o:p></o:p></sp=
an></p><p><span style=3D'font-family:"Calibri",sans-serif;color:black'><o:p=
>&nbsp;</o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;=
color:black'>1) This draft is not changing how SLA is established at first =
place. The draft&nbsp;is providing a method to convey this a priori establi=
shed&nbsp;SLA to help reduce lot of manual complexities and errors to admin=
. Thus given a knowledge of what SLA is established, in general devices sho=
uld be capable to support that established&nbsp;SLA.<o:p></o:p></span></p><=
p><span style=3D'font-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;<=
/o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:bl=
ack'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-family:"Calibri",sa=
ns-serif;color:black'>2) If there still are any issues in implementing exch=
anged SLA in forwarding, we think they either are implementation specific o=
r&nbsp;of temporary nature where for example enough resources not available=
 at any specific point of a time.<o:p></o:p></span></p><p><span style=3D'fo=
nt-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p>=
<span style=3D'font-family:"Calibri",sans-serif;color:black'>We feel that i=
n current state of the draft, it can be largely useful in deployments.<o:p>=
</o:p></span></p><p><span style=3D'font-family:"Calibri",sans-serif;color:b=
lack'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-family:"Calibri",s=
ans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p><span style=3D'font-f=
amily:"Calibri",sans-serif;color:black'><o:p>&nbsp;</o:p></span></p><p><spa=
n style=3D'font-family:"Calibri",sans-serif;color:black'>One can imagine th=
ough even establishment of SLA also can&nbsp;be done via exchanging it over=
 bgp. However, negotiation of SLA does not have to be clubbed with exchange=
 of SLA. Negotiation of SLA is not in this scope.<o:p></o:p></span></p><p><=
span style=3D'font-family:"Calibri",sans-serif;color:black'><o:p>&nbsp;</o:=
p></span></p><div><p class=3DMsoNormal><span style=3D'font-family:"Calibri"=
,sans-serif;color:black'>Regards,<o:p></o:p></span></p></div><div><p class=
=3DMsoNormal><span style=3D'font-family:"Calibri",sans-serif;color:black'>S=
hitanshu<o:p></o:p></span></p></div><p class=3DMsoNormal style=3D'margin-bo=
ttom:12.0pt'><span style=3D'font-family:"Calibri",sans-serif;color:black'><=
o:p>&nbsp;</o:p></span></p><div><div class=3DMsoNormal align=3Dcenter style=
=3D'text-align:center'><span style=3D'font-family:"Calibri",sans-serif;colo=
r:black'><hr size=3D2 width=3D"98%" align=3Dcenter></span></div><div id=3Dd=
ivRplyFwdMsg><p class=3DMsoNormal><b><span style=3D'font-size:11.0pt;font-f=
amily:"Calibri",sans-serif;color:black'>From:</span></b><span style=3D'font=
-size:11.0pt;font-family:"Calibri",sans-serif;color:black'> Susan Hares &lt=
;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br><b>Sent:</b>=
 Saturday, March 4, 2017 8:31 AM<br><b>To:</b> 'Ron Bonica'; 'Shitanshu Sha=
h'; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"ma=
ilto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-sla-exchange.=
all@ietf.org</a>; <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Su=
bject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</spa=
n><span style=3D'font-family:"Calibri",sans-serif;color:black'> <o:p></o:p>=
</span></p><div><p class=3DMsoNormal><span style=3D'font-family:"Calibri",s=
ans-serif;color:black'>&nbsp;<o:p></o:p></span></p></div></div><div><div><p=
 class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:a=
uto'><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;color=
:#1F497D'>Shitanshu: </span><span style=3D'color:black'><o:p></o:p></span><=
/p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto'><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;=
color:#1F497D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span><=
/p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto'><span style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif;=
color:#1F497D'>Please address Ron&#8217;s comment about widely deployed.&nb=
sp; I believe this was part of Alvaro&#8217;s comments. </span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:11.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;</span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:11.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>Sue </span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:11.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;</span><span style=
=3D'color:black'><o:p></o:p></span></p><div><div style=3D'border:none;borde=
r-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal s=
tyle=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style=
=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black'>From:</sp=
an></b><span style=3D'font-size:10.0pt;font-family:"Tahoma",sans-serif;colo=
r:black'> rtg-dir [<a href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-d=
ir-bounces@ietf.org</a>] <b>On Behalf Of </b>Ron Bonica<br><b>Sent:</b> Thu=
rsday, February 23, 2017 12:07 PM<br><b>To:</b> Shitanshu Shah; <a href=3D"=
mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf=
-idr-sla-exchange.all@ietf.org">draft-ietf-idr-sla-exchange.all@ietf.org</a=
>; <a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> Re: =
[RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</span><span style=
=3D'color:black'><o:p></o:p></span></p></div></div><p class=3DMsoNormal sty=
le=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'co=
lor:black'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hello,</span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;</span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>The draft is internally =
consistent. But given what is left out of scope, I wonder if the new attrib=
utes will ever be widely deployed.</span><span style=3D'color:black'><o:p><=
/o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto'><span style=3D'font-size:10.0pt;font-family:"Calibri=
",sans-serif;color:#1F497D'>&nbsp;</span><span style=3D'color:black'><o:p><=
/o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto'><span style=3D'font-size:10.0pt;font-family:"Calibri=
",sans-serif;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;</span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0=
pt;font-family:"Calibri",sans-serif;color:#1F497D'>&nbsp;</span><span style=
=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0=
pt;font-family:"Calibri",sans-serif;color:black'><br>This document might be=
nefit from discussion of operational issues. I assume that when a BGP liste=
ner learns a route with the SLA Exchange Attribute, it provisions class of =
service forwarding classes on interfaces.</span><span style=3D'color:black'=
><o:p></o:p></span></p><div><p class=3DMsoNormal style=3D'mso-margin-top-al=
t:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0pt;font-fam=
ily:"Calibri",sans-serif;color:black'>&nbsp;</span><span style=3D'color:bla=
ck'><o:p></o:p></span></p></div><div><p><span style=3D'font-size:8.5pt;font=
-family:Menlo;color:black'>##svshah, though this is one desired use of exch=
anging SLA content, the draft focuses on transporting SLA content from the =
SLA Producer to the SLA Consumer. Processing of the QoS attribute content, =
at the SLA Consumer, is outside the scope of this document.</span><span sty=
le=3D'font-family:"Calibri",sans-serif;color:black'><o:p></o:p></span></p><=
p style=3D'min-height:13px'><span style=3D'font-size:8.5pt;font-family:Menl=
o;color:black'>&nbsp;</span><span style=3D'font-family:"Calibri",sans-serif=
;color:black'><o:p></o:p></span></p><p><span style=3D'font-size:8.5pt;font-=
family:Menlo;color:black'>##svshah, Let me know if you have a suggestion to=
 make description clearer in Section 1 and 2 to highlight this.</span><span=
 style=3D'font-family:"Calibri",sans-serif;color:black'><o:p></o:p></span><=
/p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-mar=
gin-bottom-alt:auto'><span style=3D'font-size:10.0pt;font-family:"Calibri",=
sans-serif;color:black'>&nbsp;</span><span style=3D'color:black'><o:p></o:p=
></span></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0pt;font-family:"=
Calibri",sans-serif;color:black'>&nbsp;</span><span style=3D'color:black'><=
o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'mso-margin-to=
p-alt:auto;mso-margin-bottom-alt:auto'><span style=3D'font-size:10.0pt;font=
-family:"Calibri",sans-serif;color:black'>I also assume that a) it takes ti=
me to provision class of service forwarding classes and b) the number of fo=
rwarding classes that can be provisioned are finite. What does the BGP list=
ener do when the number of forwarding classes requested exceeds its capacit=
y to deliver?&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p=
></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margi=
n-bottom-alt:auto'><span style=3D'font-size:10.0pt;font-family:"Calibri",sa=
ns-serif;color:black'>&nbsp;</span><span style=3D'color:black'><o:p></o:p><=
/span></p></div><div><p><span style=3D'font-size:8.5pt;font-family:Menlo;co=
lor:black'>##svshah, Since scope of the document is to transport SLA conten=
t from the SLA Producer to the SLA Consumer, the document considers error h=
andling in the context of transporting data and thus any formating errors a=
nd semantics errors within that context. Any errors in the context of proce=
ssing QoS attribute content at the SLA Consumer is outside the scope of the=
 document.</span><span style=3D'font-family:"Calibri",sans-serif;color:blac=
k'><o:p></o:p></span></p><p style=3D'margin-bottom:12.0pt'><span style=3D'f=
ont-size:8.5pt;font-family:Menlo;color:black'>&nbsp;</span><span style=3D'f=
ont-family:"Calibri",sans-serif;color:black'><o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto'><span style=3D'font-size:10.0pt;font-family:"Calibri",sans-serif;=
color:black'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p=
></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margi=
n-bottom-alt:auto'><span style=3D'font-size:10.0pt;font-family:"Calibri",sa=
ns-serif;color:black'>&nbsp;</span><span style=3D'color:black'><o:p></o:p><=
/span></p></div></div></div></div></div></div></div></body></html>=

--_000_467340A77F13C944919805BFF3B8ACFC30DC040884FHDP1LUMXC7V9_--


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From: Ron Bonica <rbonica@juniper.net>
To: "EXT - luis.tomotaki@verizon.com" <luis.tomotaki@verizon.com>, Susan Hares <shares@ndzh.com>, 'Shitanshu Shah' <shitanshu_shah@hotmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/bAv5e6jXCSdX-jixGs-Ytpej4TQ>
Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Yes. I will send you a meeting invite. Feel free to forward it.

                             Ron


From: Tomotaki, Luis M [mailto:luis.tomotaki@verizon.com]
Sent: Tuesday, March 14, 2017 12:53 PM
To: Ron Bonica <rbonica@juniper.net>; Susan Hares <shares@ndzh.com>; 'Shita=
nshu Shah' <shitanshu_shah@hotmail.com>; rtg-dir@ietf.org; draft-ietf-idr-s=
la-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hi Ron,
Are you available for a quick call on Thursday at 10AM CT?

Luis

From: Ron Bonica [mailto:rbonica@juniper.net]
Sent: Sunday, March 12, 2017 11:11 AM
To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; Tomotaki, Luis M=
 <luis.tomotaki@one.verizon.com<mailto:luis.tomotaki@one.verizon.com>>; 'Sh=
itanshu Shah' <shitanshu_shah@hotmail.com<mailto:shitanshu_shah@hotmail.com=
>>; rtg-dir@ietf.org<mailto:rtg-dir@ietf.org>; draft-ietf-idr-sla-exchange.=
all@ietf.org<mailto:draft-ietf-idr-sla-exchange.all@ietf.org>; idr@ietf.org=
<mailto:idr@ietf.org>
Subject: [E] RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange=
-10

Luis,

This discussion might require a slightly higher bandwidth channel. Feel fre=
e to call me whenever you get a chance.

                                                                 Ron
                                                                  571 203 1=
704


From: Susan Hares [mailto:shares@ndzh.com]
Sent: Wednesday, March 8, 2017 10:23 AM
To: EXT - luis.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com> <luis=
.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com>>; 'Shitanshu Shah' =
<shitanshu_shah@hotmail.com<mailto:shitanshu_shah@hotmail.com>>; Ron Bonica=
 <rbonica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto=
:rtg-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-i=
etf-idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Luis:

Thank you for letting me know you desire for this feature.   Since Ron had =
additional questions, I'll let him start off this discussion.

Sue

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Tomotaki, Luis M
Sent: Tuesday, March 7, 2017 11:11 PM
To: Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org<mailto:rtg-=
dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-i=
dr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Ron and Sue,
>From a service provider perspective, exchanging the SLA information between=
 the PE and CE would be very beneficial and could be widely used.  I think =
this is particular important in service provider's L3VPN networks where the=
 customers or service providers currently do not have full visibility to th=
e QoS policy in the other end of the connection but still needs matching CE=
-PE SLA/QoS policies to achieve the correct two-way traffic prioritization =
behavior during congestion.  In this example, once the SLA information exch=
ange is standardized, my expectation is that the different CE/PE vendors wo=
uld be able to automatically update in a vendor specific way, the SLA/QoS p=
olicies based on the SLA information provided via BGP.

Luis

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com]
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; 'Ron Bonica' <rb=
onica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto:rtg=
-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-=
idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10


Hi Sue,



Following is what I had responded to Ron. Hopefully that addresses/clarifie=
s.



To break it down in two point response,



1) This draft is not changing how SLA is established at first place. The dr=
aft is providing a method to convey this a priori established SLA to help r=
educe lot of manual complexities and errors to admin. Thus given a knowledg=
e of what SLA is established, in general devices should be capable to suppo=
rt that established SLA.





2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or of temporary nature =
where for example enough resources not available at any specific point of a=
 time.



We feel that in current state of the draft, it can be largely useful in dep=
loyments.







One can imagine though even establishment of SLA also can be done via excha=
nging it over bgp. However, negotiation of SLA does not have to be clubbed =
with exchange of SLA. Negotiation of SLA is not in this scope.


Regards,
Shitanshu

________________________________
From: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org<mailto:rtg-dir@ietf.or=
g>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exch=
ange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Shitanshu:

Please address Ron's comment about widely deployed.  I believe this was par=
t of Alvaro's comments.

Sue

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org<mailto:rtg-dir@ietf.org>; draft-ietf-i=
dr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exchange.all@ietf.or=
g>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hello,

The draft is internally consistent. But given what is left out of scope, I =
wonder if the new attributes will ever be widely deployed.

                                                                           =
     Ron



This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.


##svshah, though this is one desired use of exchanging SLA content, the dra=
ft focuses on transporting SLA content from the SLA Producer to the SLA Con=
sumer. Processing of the QoS attribute content, at the SLA Consumer, is out=
side the scope of this document.



##svshah, Let me know if you have a suggestion to make description clearer =
in Section 1 and 2 to highlight this.


I also assume that a) it takes time to provision class of service forwardin=
g classes and b) the number of forwarding classes that can be provisioned a=
re finite. What does the BGP listener do when the number of forwarding clas=
ses requested exceeds its capacity to deliver?


##svshah, Since scope of the document is to transport SLA content from the =
SLA Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and semantic=
s errors within that context. Any errors in the context of processing QoS a=
ttribute content at the SLA Consumer is outside the scope of the document.





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</head>
<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Yes. I will send you a meeting invite=
. Feel free to forward it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><a name=3D"_MailEndCompose"><span style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p>&nbs=
p;</o:p></span></a></p>
<span style=3D"mso-bookmark:_MailEndCompose"></span>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Tomotaki, Luis M [mailto:luis.=
tomotaki@verizon.com]
<br>
<b>Sent:</b> Tuesday, March 14, 2017 12:53 PM<br>
<b>To:</b> Ron Bonica &lt;rbonica@juniper.net&gt;; Susan Hares &lt;shares@n=
dzh.com&gt;; 'Shitanshu Shah' &lt;shitanshu_shah@hotmail.com&gt;; rtg-dir@i=
etf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org<br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Hi Ron,
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Are you available for a quick call on=
 Thursday at 10AM CT?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Ron Bonica [<a href=3D"mailto:=
rbonica@juniper.net">mailto:rbonica@juniper.net</a>]
<br>
<b>Sent:</b> Sunday, March 12, 2017 11:11 AM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.c=
om</a>&gt;; Tomotaki, Luis M &lt;<a href=3D"mailto:luis.tomotaki@one.verizo=
n.com">luis.tomotaki@one.verizon.com</a>&gt;; 'Shitanshu Shah' &lt;<a href=
=3D"mailto:shitanshu_shah@hotmail.com">shitanshu_shah@hotmail.com</a>&gt;;
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-idr-sla-exchange.all@ietf.org">
draft-ietf-idr-sla-exchange.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.or=
g">idr@ietf.org</a><br>
<b>Subject:</b> [E] RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-e=
xchange-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This discussion might require a sligh=
tly higher bandwidth channel. Feel free to call me whenever you get a chanc=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;571 203 1704<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Susan Hares [<a href=3D"mailto=
:shares@ndzh.com">mailto:shares@ndzh.com</a>]
<br>
<b>Sent:</b> Wednesday, March 8, 2017 10:23 AM<br>
<b>To:</b> EXT - <a href=3D"mailto:luis.tomotaki@verizon.com">luis.tomotaki=
@verizon.com</a> &lt;<a href=3D"mailto:luis.tomotaki@verizon.com">luis.tomo=
taki@verizon.com</a>&gt;; 'Shitanshu Shah' &lt;<a href=3D"mailto:shitanshu_=
shah@hotmail.com">shitanshu_shah@hotmail.com</a>&gt;;
 Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net<=
/a>&gt;; <a href=3D"mailto:rtg-dir@ietf.org">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Thank you for letting me know you des=
ire for this feature.&nbsp; &nbsp;Since Ron had additional questions, I&#82=
17;ll let him start off this discussion.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Sue
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bounc=
es@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Tomotaki, Luis M<br>
<b>Sent:</b> Tuesday, March 7, 2017 11:11 PM<br>
<b>To:</b> Shitanshu Shah; Susan Hares; 'Ron Bonica'; <a href=3D"mailto:rtg=
-dir@ietf.org">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Ron and Sue,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">From a service provider perspective, =
exchanging the SLA information between the PE and CE would be very benefici=
al and could be widely used.&nbsp; I think this is
 particular important in service provider&#8217;s L3VPN networks where the =
customers or service providers currently do not have full visibility to the=
 QoS policy in the other end of the connection but still needs matching CE-=
PE SLA/QoS policies to achieve the correct
 two-way traffic prioritization behavior during congestion.&nbsp; In this e=
xample, once the SLA information exchange is standardized, my expectation i=
s that the different CE/PE vendors would be able to automatically update in=
 a vendor specific way, the SLA/QoS policies
 based on the SLA information provided via BGP.&nbsp; <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Shitanshu Shah [<a href=3D"mai=
lto:shitanshu_shah@hotmail.com">mailto:shitanshu_shah@hotmail.com</a>]
<br>
<b>Sent:</b> Monday, March 6, 2017 9:31 AM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.c=
om</a>&gt;; 'Ron Bonica' &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica=
@juniper.net</a>&gt;;
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-idr-sla-exchange.all@ietf.org">
draft-ietf-idr-sla-exchange.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.or=
g">idr@ietf.org</a><br>
<b>Subject:</b> [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchang=
e-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div id=3D"divtagdefaultwrapper">
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i Sue,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">F=
ollowing is what I had responded to Ron. Hopefully&nbsp;that addresses/clar=
ifies.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
o break it down in two point response,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">1=
) This draft is not changing how SLA is established at first place. The dra=
ft&nbsp;is providing a method to convey this a priori established&nbsp;SLA =
to help reduce lot of manual complexities and errors to
 admin. Thus given a knowledge of what SLA is established, in general devic=
es should be capable to support that established&nbsp;SLA.<o:p></o:p></span=
></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">2=
) If there still are any issues in implementing exchanged SLA in forwarding=
, we think they either are implementation specific or&nbsp;of temporary nat=
ure where for example enough resources not available
 at any specific point of a time.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">W=
e feel that in current state of the draft, it can be largely useful in depl=
oyments.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">O=
ne can imagine though even establishment of SLA also can&nbsp;be done via e=
xchanging it over bgp. However, negotiation of SLA does not have to be club=
bed with exchange of SLA. Negotiation of SLA is not
 in this scope.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Shitanshu<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Calibri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">
<hr size=3D"2" width=3D"98%" align=3D"center">
</span></div>
<div id=3D"divRplyFwdMsg">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Susan =
Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br>
<b>Sent:</b> Saturday, March 4, 2017 8:31 AM<br>
<b>To:</b> 'Ron Bonica'; 'Shitanshu Shah'; <a href=3D"mailto:rtg-dir@ietf.o=
rg">rtg-dir@ietf.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Shitanshu:
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Please address Ron&#8217;s comment about widely dep=
loyed.&nbsp; I believe this was part of Alvaro&#8217;s comments.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Sue
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> rtg-dir
 [<a href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-dir-bounces@ietf.o=
rg</a>] <b>
On Behalf Of </b>Ron Bonica<br>
<b>Sent:</b> Thursday, February 23, 2017 12:07 PM<br>
<b>To:</b> Shitanshu Shah; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf=
.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Hello,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The draft is internally consistent. But given what =
is left out of scope, I wonder if the new attributes
 will ever be widely deployed.</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black"><br>
This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
though this is one desired use of exchanging SLA content, the draft focuses=
 on transporting SLA content from the SLA Producer to the SLA Consumer. Pro=
cessing of the QoS attribute content,
 at the SLA Consumer, is outside the scope of this document.</span><span st=
yle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p><=
/span></p>
<p style=3D"min-height:13px"><span style=3D"font-size:8.5pt;font-family:Men=
lo;color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibri&quot;=
,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Let me know if you have a suggestion to make description clearer in Section=
 1 and 2 to highlight this.</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">I also assume that a) it takes time to provision clas=
s of service forwarding classes and b) the number
 of forwarding classes that can be provisioned are finite. What does the BG=
P listener do when the number of forwarding classes requested exceeds its c=
apacity to deliver?&nbsp;</span><span style=3D"color:black"><o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Since scope of the document is to transport SLA content from the SLA Produc=
er to the SLA Consumer, the document considers error handling in the contex=
t of transporting data and thus any
 formating errors and semantics errors within that context. Any errors in t=
he context of processing QoS attribute content at the SLA Consumer is outsi=
de the scope of the document.</span><span style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif;color:black"><o:p></o:p></span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-size:8.5pt;font-famil=
y:Menlo;color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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Date: Mon, 20 Mar 2017 02:05:46 +0530
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To: "Andrew G. Malis" <agmalis@gmail.com>
Cc: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>,  "draft-ietf-trill-transport-over-mpls@ietf.org" <draft-ietf-trill-transport-over-mpls@ietf.org>,  "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "trill@ietf.org" <trill@ietf.org>
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Subject: Re: [RTG-DIR] Routing Area Directorate QA review of draft-ietf-trill-transport-over-mpls-02
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Hi Andy and Mathew,

Thanks for your comments. Plz find our response inline between <Kingston>
tags

P.S: Sorry. Was tied up with some work and hence the delay.

Regards,
S. Kingston Smiler.

On Mon, Feb 27, 2017 at 10:12 PM, Andrew G. Malis <agmalis@gmail.com> wrote=
:

> I=E2=80=99ve got some comments on Matthew=E2=80=99s review, inline.
>
> On Mon, Feb 27, 2017 at 10:44 AM, Bocci, Matthew (Nokia - GB) <
> matthew.bocci@nokia.com> wrote:
>
>> Routing Area Directorate QA review of draft-ietf-trill-transport-ove
>> r-mpls-02
>>
>>
>>
>> Hi,
>>
>>
>>
>> I have been assigned the QA reviewer for this draft. The general
>> guidelines for QA reviews
>>
>> can be found at:
>>
>> https://trac.ietf.org/trac/rtg/wiki/RtgDirDocQa
>>
>>
>>
>> These state:
>>
>>
>>
>>   "When reviewing a draft at WG Adoption, the QA Reviewer should
>>
>>   determine whether the draft is readable, understandable, makes sense
>>
>>   and is a good start for a WG draft. Any issues the QA Reviewer finds
>>
>>   are written down, sent to the mailing list and discussed for future
>>
>>   versions"
>>
>>
>>
>> Here is my review of this draft:
>>
>>
>>
>> ** Summary.
>>
>> Generally, the draft is well written - thank you. I have a few minor
>> comments below,
>>
>> mostly related to the relationship between TRILL over MPLS and
>> established VPLS mechanisms.
>>
>>
>>
>> ** Is the draft readable?
>>
>>
>>
>> Yes. There are a few minor grammatical errors and it would help if the
>> draft was proof-read
>>
>> to weed-out these. An example is:
>>
>> Abstract
>>
>> "..that are separated by MPLS provider network."
>>
>> s/by MPLS/by an MPLS
>>
>>
>>
>>
>>
>> ** Is the draft understandable?
>>
>>
>>
>> Yes, provided the reader is familiar with TRILL, MPLS and VPLS.
>>
>>
>>
>> ** Does it make sense?
>>
>> I think it is mostly clear, but I have a few comments, as follows:
>>
>>
>>
>> Section 3.4. MPLS encapsulation for VPLS model
>>
>>
>>
>> "Use of VPLS [RFC4762] to interconnect TRILL sites requires no changes t=
o
>>
>> a VPLS implementation, in particular the use of Ethernet pseudowires
>>
>> between VPLS PEs. A VPLS PE receives normal Ethernet frames from an
>>
>> RBridge (i.e., CE) and is not aware that the CE is an RBridge device. As
>>
>> a result, an MPLS-encapsulated TRILL packet within the MPLS network will
>>
>> use the format illustrated in Appendix A of [RFC7173]."
>>
>>
>>
>> It doesn't look like the encapsulation shown in Appendix A of
>>
>> RFC7173 takes account of the case where PBB VPLS [RFC7041] is used in th=
e
>> provider's
>>
>> MPLS network, but I would have thought this would still be a valid VPLS
>> type to transport
>>
>> TRILL. It might be worth qualifying your reference with some text to
>> state that
>>
>> this is just an example in the non-PBB case.
>>
>

> Andy: As the author of this paragraph, I agree with Matthew=E2=80=99s com=
ment. We
> can change the last sentence to say:
>
> "As an example, an MPLS-encapsulated TRILL packet within the MPLS network
> will
> use the format illustrated in Appendix A of [RFC7173] for the non-PBB
> case, or
> in the PBB case, with the additional header fields illustrated in
> [RFC7041]."
>
> <Kingston>
Typically PBB-VPLS is used to avoid exposing the customer MAC in service
provider network. In case of TRILL packet over MPLS, already the customer
MAC is encapsulated inside the TRILL header. Having said that, do we really
need to consider TRILL over PBB-VPLS.
</Kingston>

>
>>
>> Section 4.1.1:
>>
>> "TIR devices are a superset of the VPLS-PE devices defined in [RFC4026]
>> with the
>>
>> additional functionality of TRILL."
>>
>> Is this really true? Later you state that TIRs use PPP PWs, not the
>> Ethernet PWs used in
>>
>> VPLS. It is also not clear if TRILL needs some of the LDP or BGP
>> signaling extensions
>>
>> used for VPLS. Wouldn't it be cleaner just to define a TIR as a new kind
>> of PE?
>>
>
> Andy: I also agree with this comment.
>
>
>>
>>
> <Kingston>
Agreed to your comment. We need to consider ethernet encapsulation. Will
update the draft
</Kingston>

Section 6. VPTS Model Versus VPLS Model
>>
>> "An issue with the above rule is that if a pseudowire between PEs fails,
>>
>> frames will not get forwarded between the PEs where pseudowire went
>>
>> down."
>>
>>
>>
>> I think this is only true for a simple full mesh VPLS where there are no=
t
>> other protection
>>
>> mechanisms. I am not sure this is applicable to H-VPLS with PW
>> redundancy, for example,
>>
>> which I think is likely to be a widespread deployment case for the VPLS
>> model of TRILL
>>
>> over MPLS.
>>
>
> Andy: I agree. In addition, see section 4.4 of RFC 4742, which allows the
> use of spanning tree in a VPLS network to provide redundancy in the case =
of
> a failure in the VPLS.
>
> <Kingston>
Agreed to your comment.  Will update the same in next version of the draft
</Kingston>

>
>
>>
>>  Best regards
>>
>>  Matthew
>>
>
> Cheers,
> Andy
>
>
>

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<div dir=3D"ltr">Hi Andy and Mathew,<div><br></div><div>Thanks for your com=
ments. Plz find our response inline between <font color=3D"#0000ff">&lt;Kin=
gston&gt;</font> tags</div><div><br></div><div>P.S: Sorry. Was tied up with=
 some work and hence the delay.</div><div><br></div><div>Regards,</div><div=
>S. Kingston Smiler.</div><div class=3D"gmail_extra"><br><div class=3D"gmai=
l_quote">On Mon, Feb 27, 2017 at 10:12 PM, Andrew G. Malis <span dir=3D"ltr=
">&lt;<a href=3D"mailto:agmalis@gmail.com" target=3D"_blank">agmalis@gmail.=
com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex"><div dir=3D"ltr">I=E2=80=99ve got some comments on Matthew=E2=80=99s re=
view, inline.<div class=3D"gmail_extra"><br><div class=3D"gmail_quote"><div=
><div class=3D"gmail-h5">On Mon, Feb 27, 2017 at 10:44 AM, Bocci, Matthew (=
Nokia - GB) <span dir=3D"ltr">&lt;<a href=3D"mailto:matthew.bocci@nokia.com=
" target=3D"_blank">matthew.bocci@nokia.com</a>&gt;</span> wrote:<br><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex">







<div bgcolor=3D"white" lang=3D"EN-GB">
<div class=3D"gmail-m_6824780281540652770gmail-m_-5769225616577501505WordSe=
ction1">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Routing Area Director=
ate QA review of draft-ietf-trill-transport-ove<wbr>r-mpls-02<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Hi,<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">I have been assigned =
the QA reviewer for this draft. The general guidelines for QA reviews
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">can be found at:<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><a href=3D"https://tr=
ac.ietf.org/trac/rtg/wiki/RtgDirDocQa" target=3D"_blank">https://trac.ietf.=
org/trac/rtg<wbr>/wiki/RtgDirDocQa</a>
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">These state:<u></u><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0 &quot;When rev=
iewing a draft at WG Adoption, the QA Reviewer should<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0 determine whet=
her the draft is readable, understandable, makes sense<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0 and is a good =
start for a WG draft. Any issues the QA Reviewer finds<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0 are written do=
wn, sent to the mailing list and discussed for future<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0 versions&quot;=
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Here is my review of =
this draft:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">** Summary.<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Generally, the draft =
is well written - thank you. I have a few minor comments below,
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">mostly related to the=
 relationship between TRILL over MPLS and established VPLS mechanisms.<u></=
u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">** Is the draft reada=
ble?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Yes. There are a few =
minor grammatical errors and it would help if the draft was proof-read
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">to weed-out these. An=
 example is:
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Abstract<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">&quot;..that are sepa=
rated by MPLS provider network.&quot;<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">s/by MPLS/by an MPLS<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">** Is the draft under=
standable?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Yes, provided the rea=
der is familiar with TRILL, MPLS and VPLS.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">** Does it make sense=
?<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">I think it is mostly =
clear, but I have a few comments, as follows:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Section 3.4. MPLS enc=
apsulation for VPLS model<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">&quot;Use of VPLS [RF=
C4762] to interconnect TRILL sites requires no changes to<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">a VPLS implementation=
, in particular the use of Ethernet pseudowires<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">between VPLS PEs. A V=
PLS PE receives normal Ethernet frames from an<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">RBridge (i.e., CE) an=
d is not aware that the CE is an RBridge device. As<u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">a result, an MPLS-enc=
apsulated TRILL packet within the MPLS network will<u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">use the format illust=
rated in Appendix A of [RFC7173].&quot;<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">It doesn&#39;t look l=
ike the encapsulation shown in Appendix A of<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">RFC7173 takes account=
 of the case where PBB VPLS [RFC7041] is used in the provider&#39;s
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">MPLS network, but I w=
ould have thought this would still be a valid VPLS type to transport
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">TRILL. It might be wo=
rth qualifying your reference with some text to state that
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">this is just an examp=
le in the non-PBB case.</span></p></div></div></blockquote></div></div></di=
v></div></div></blockquote><div><br></div><blockquote class=3D"gmail_quote"=
 style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);p=
adding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"=
gmail_quote"><div><div class=3D"gmail-h5"><div><br></div></div></div><div>A=
ndy: As the author of this paragraph, I agree with Matthew=E2=80=99s commen=
t. We can change the last sentence to say:</div><div><br></div><div><div>&q=
uot;As an example, an MPLS-encapsulated TRILL packet within the MPLS networ=
k will</div><div>use the format illustrated in Appendix A of [RFC7173] for =
the non-PBB case, or</div></div><div>in the PBB case, with the additional h=
eader fields illustrated in [RFC7041].&quot;</div><span class=3D"gmail-"><d=
iv><br></div></span></div></div></div></blockquote><div style=3D"font-size:=
12.8px"><font color=3D"#0000ff">&lt;Kingston&gt;</font></div><div style=3D"=
font-size:12.8px"><font color=3D"#0000ff">Typically PBB-VPLS is used to avo=
id exposing the customer MAC in service provider network. In case of TRILL =
packet over MPLS, already the customer MAC is encapsulated inside the TRILL=
 header. Having said that, do we really need to consider TRILL over PBB-VPL=
S. =C2=A0=C2=A0</font></div><div><span style=3D"font-size:12.8px"><font col=
or=3D"#0000ff">&lt;/Kingston&gt;=C2=A0</font></span>=C2=A0</div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail=
_extra"><div class=3D"gmail_quote"><span class=3D"gmail-"><div></div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex"><div bgcolor=3D"white" lang=3D"=
EN-GB"><div class=3D"gmail-m_6824780281540652770gmail-m_-576922561657750150=
5WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Section 4.1.1:<u></u>=
<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">&quot;TIR devices are=
 a superset of the VPLS-PE devices defined in [RFC4026] with the
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">additional functional=
ity of TRILL.&quot;<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Is this really true? =
Later you state that TIRs use PPP PWs, not the Ethernet PWs used in
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">VPLS. It is also not =
clear if TRILL needs some of the LDP or BGP signaling extensions
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">used for VPLS. Wouldn=
&#39;t it be cleaner just to define a TIR as a new kind of PE?</span></p></=
div></div></blockquote><div><br></div></span><div>Andy: I also agree with t=
his comment.</div><span class=3D"gmail-"><div>=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><div bgcolor=3D"white" lang=3D"EN-GB"><div=
 class=3D"gmail-m_6824780281540652770gmail-m_-5769225616577501505WordSectio=
n1"><p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0</span><=
/p></div></div></blockquote></span></div></div></div></blockquote><div><fon=
t color=3D"#0000ff">&lt;Kingston&gt;</font></div><div><font color=3D"#0000f=
f"><span style=3D"font-size:12.8px">Agreed to your comment. We need to cons=
ider ethernet encapsulation. Will update the draft</span><br></font></div><=
div><font color=3D"#0000ff">&lt;/Kingston&gt;</font>=C2=A0</div><div><br></=
div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bor=
der-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div=
 class=3D"gmail_extra"><div class=3D"gmail_quote"><span class=3D"gmail-"><b=
lockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-le=
ft:1px solid rgb(204,204,204);padding-left:1ex"><div bgcolor=3D"white" lang=
=3D"EN-GB"><div class=3D"gmail-m_6824780281540652770gmail-m_-57692256165775=
01505WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u=
></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Section 6. VPTS Model=
 Versus VPLS Model<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">&quot;An issue with t=
he above rule is that if a pseudowire between PEs fails,<u></u><u></u></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">frames will not get f=
orwarded between the PEs where pseudowire went<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">down.&quot;<u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0<u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">I think this is only =
true for a simple full mesh VPLS where there are not other protection<u></u=
><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">mechanisms. I am not =
sure this is applicable to H-VPLS with PW redundancy, for example,
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">which I think is like=
ly to be a widespread deployment case for the VPLS model of TRILL
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">over MPLS.</span></p>=
</div></div></blockquote><div><br></div></span><div>Andy: I agree. In addit=
ion, see section 4.4 of RFC 4742, which allows the use of spanning tree in =
a VPLS network to provide redundancy in the case of a failure in the VPLS.<=
/div><div><br></div></div></div></div></blockquote><div><font color=3D"#000=
0ff">&lt;Kingston&gt;</font></div><div><font color=3D"#0000ff"><span style=
=3D"font-size:12.8px">Agreed to your comment.=C2=A0</span><span style=3D"fo=
nt-size:12.8px">=C2=A0</span><span style=3D"font-size:12.8px">Will update t=
he same in next version of the draft</span><br></font></div><div><font colo=
r=3D"#0000ff">&lt;/Kingston&gt;=C2=A0</font></div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,20=
4,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_extra"><div c=
lass=3D"gmail_quote"><div></div><div><br></div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,2=
04);padding-left:1ex"><div bgcolor=3D"white" lang=3D"EN-GB"><div class=3D"g=
mail-m_6824780281540652770gmail-m_-5769225616577501505WordSection1"><p clas=
s=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0<u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0Best regards<sp=
an class=3D"gmail-m_6824780281540652770gmail-HOEnZb"><font color=3D"#888888=
"><u></u><u></u></font></span></span></p><span class=3D"gmail-m_68247802815=
40652770gmail-HOEnZb"><font color=3D"#888888">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">=C2=A0Matthew</span><=
/p></font></span></div></div></blockquote><div><br></div><div>Cheers,</div>=
<div>Andy</div><div>=C2=A0</div></div><br></div></div>
</blockquote></div><br></div></div>

--001a1140dc560658b5054b1b5bfd--


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From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Mon, 20 Mar 2017 03:10:07 -0400
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To: Kingston Smiler <kingstonsmiler@gmail.com>
Cc: "Bocci, Matthew (Nokia - GB)" <matthew.bocci@nokia.com>,  "draft-ietf-trill-transport-over-mpls@ietf.org" <draft-ietf-trill-transport-over-mpls@ietf.org>,  "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "trill@ietf.org" <trill@ietf.org>
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Subject: Re: [RTG-DIR] Routing Area Directorate QA review of draft-ietf-trill-transport-over-mpls-02
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Kingston,

On Sun, Mar 19, 2017 at 4:35 PM, Kingston Smiler <kingstonsmiler@gmail.com>
wrote:

> <Kingston>
> Typically PBB-VPLS is used to avoid exposing the customer MAC in service
> provider network. In case of TRILL packet over MPLS, already the customer
> MAC is encapsulated inside the TRILL header. Having said that, do we really
> need to consider TRILL over PBB-VPLS.
> </Kingston>
>
>>
PBB (and by extension, PBB-VPLS) is not just used for C-MAC hiding, but
also for provider infrastructure scaling, so I would think the answer is
yes. Matthew, do you agree?

Cheers,
Andy

--f403043c4028cc6784054b24387d
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<div dir=3D"ltr"><div class=3D"gmail_extra">Kingston,</div><div class=3D"gm=
ail_extra"><br><div class=3D"gmail_quote">On Sun, Mar 19, 2017 at 4:35 PM, =
Kingston Smiler <span dir=3D"ltr">&lt;<a href=3D"mailto:kingstonsmiler@gmai=
l.com" target=3D"_blank">kingstonsmiler@gmail.com</a>&gt;</span> wrote:<br>=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div style=3D"font-size:12.8px"><font color=
=3D"#0000ff">&lt;Kingston&gt;</font></div><div style=3D"font-size:12.8px"><=
font color=3D"#0000ff">Typically PBB-VPLS is used to avoid exposing the cus=
tomer MAC in service provider network. In case of TRILL packet over MPLS, a=
lready the customer MAC is encapsulated inside the TRILL header. Having sai=
d that, do we really need to consider TRILL over PBB-VPLS. =C2=A0=C2=A0</fo=
nt></div><div><span style=3D"font-size:12.8px"><font color=3D"#0000ff">&lt;=
/Kingston&gt;=C2=A0</font></span>=C2=A0</div><span class=3D""><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px soli=
d rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_e=
xtra"><div class=3D"gmail_quote"><span class=3D"m_7437456232576830257gmail-=
"><div></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div bgcolor=
=3D"white" lang=3D"EN-GB"><div class=3D"m_7437456232576830257gmail-m_682478=
0281540652770gmail-m_-5769225616577501505WordSection1">
<p class=3D"MsoNormal"></p></div></div></blockquote></span></div></div></di=
v></blockquote></span></blockquote></div><br></div><div class=3D"gmail_extr=
a">PBB (and by extension, PBB-VPLS) is not just used for C-MAC hiding, but =
also for provider infrastructure scaling, so I would think the answer is ye=
s. Matthew, do you agree?</div><div class=3D"gmail_extra"><br></div><div cl=
ass=3D"gmail_extra">Cheers,</div><div class=3D"gmail_extra">Andy</div><div =
class=3D"gmail_extra"><br></div></div>

--f403043c4028cc6784054b24387d--


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From: Ron Bonica <rbonica@juniper.net>
To: Susan Hares <shares@ndzh.com>, "EXT - luis.tomotaki@verizon.com" <luis.tomotaki@verizon.com>, 'Shitanshu Shah' <shitanshu_shah@hotmail.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Folks,

Luis and I spoke on Friday. The following is a summary of our conversation:

Draft-ietf-idr-sla-exchange proposes a mechanism through which a BGP speake=
r associates a forwarding policy with a prefix. When a BGP listener receive=
s an advertisement that is associated with a policy, it:


-          Instantiates the policy, if it does not already exist

-          Associates the prefix with the policy

BGP listeners can instantiate a finite number of policies (N).  SO, what ha=
ppens when a BGP listener has N policies instantiated and it receives an ad=
vertisement that would normally cause it to instantiate another policy? Opt=
ions are:


-          Tear down the session

-          Discard the advertisement

-          Install the route, but without the advertisement

-          Do something else?

We should probably be explicit about the required behavior.

                                                                     Ron


From: Ron Bonica
Sent: Sunday, March 12, 2017 12:11 PM
To: 'Susan Hares' <shares@ndzh.com>; EXT - luis.tomotaki@verizon.com <luis.=
tomotaki@verizon.com>; 'Shitanshu Shah' <shitanshu_shah@hotmail.com>; rtg-d=
ir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Luis,

This discussion might require a slightly higher bandwidth channel. Feel fre=
e to call me whenever you get a chance.

                                                                 Ron
                                                                  571 203 1=
704


From: Susan Hares [mailto:shares@ndzh.com]
Sent: Wednesday, March 8, 2017 10:23 AM
To: EXT - luis.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com> <luis=
.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com>>; 'Shitanshu Shah' =
<shitanshu_shah@hotmail.com<mailto:shitanshu_shah@hotmail.com>>; Ron Bonica=
 <rbonica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto=
:rtg-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-i=
etf-idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Luis:

Thank you for letting me know you desire for this feature.   Since Ron had =
additional questions, I'll let him start off this discussion.

Sue

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Tomotaki, Luis M
Sent: Tuesday, March 7, 2017 11:11 PM
To: Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org<mailto:rtg-=
dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-i=
dr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Ron and Sue,
>From a service provider perspective, exchanging the SLA information between=
 the PE and CE would be very beneficial and could be widely used.  I think =
this is particular important in service provider's L3VPN networks where the=
 customers or service providers currently do not have full visibility to th=
e QoS policy in the other end of the connection but still needs matching CE=
-PE SLA/QoS policies to achieve the correct two-way traffic prioritization =
behavior during congestion.  In this example, once the SLA information exch=
ange is standardized, my expectation is that the different CE/PE vendors wo=
uld be able to automatically update in a vendor specific way, the SLA/QoS p=
olicies based on the SLA information provided via BGP.

Luis

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com]
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; 'Ron Bonica' <rb=
onica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto:rtg=
-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-=
idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10


Hi Sue,



Following is what I had responded to Ron. Hopefully that addresses/clarifie=
s.



To break it down in two point response,



1) This draft is not changing how SLA is established at first place. The dr=
aft is providing a method to convey this a priori established SLA to help r=
educe lot of manual complexities and errors to admin. Thus given a knowledg=
e of what SLA is established, in general devices should be capable to suppo=
rt that established SLA.





2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or of temporary nature =
where for example enough resources not available at any specific point of a=
 time.



We feel that in current state of the draft, it can be largely useful in dep=
loyments.







One can imagine though even establishment of SLA also can be done via excha=
nging it over bgp. However, negotiation of SLA does not have to be clubbed =
with exchange of SLA. Negotiation of SLA is not in this scope.


Regards,
Shitanshu

________________________________
From: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org<mailto:rtg-dir@ietf.or=
g>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exch=
ange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Shitanshu:

Please address Ron's comment about widely deployed.  I believe this was par=
t of Alvaro's comments.

Sue

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org<mailto:rtg-dir@ietf.org>; draft-ietf-i=
dr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exchange.all@ietf.or=
g>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hello,

The draft is internally consistent. But given what is left out of scope, I =
wonder if the new attributes will ever be widely deployed.

                                                                           =
     Ron



This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.


##svshah, though this is one desired use of exchanging SLA content, the dra=
ft focuses on transporting SLA content from the SLA Producer to the SLA Con=
sumer. Processing of the QoS attribute content, at the SLA Consumer, is out=
side the scope of this document.



##svshah, Let me know if you have a suggestion to make description clearer =
in Section 1 and 2 to highlight this.


I also assume that a) it takes time to provision class of service forwardin=
g classes and b) the number of forwarding classes that can be provisioned a=
re finite. What does the BGP listener do when the number of forwarding clas=
ses requested exceeds its capacity to deliver?


##svshah, Since scope of the document is to transport SLA content from the =
SLA Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and semantic=
s errors within that context. Any errors in the context of processing QoS a=
ttribute content at the SLA Consumer is outside the scope of the document.





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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Folks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis and I spoke on Friday. The follo=
wing is a summary of our conversation:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Draft-ietf-idr-sla-exchange proposes =
a mechanism through which a BGP speaker associates a forwarding policy with=
 a prefix.
<a name=3D"_MailEndCompose">When a BGP listener receives an advertisement t=
hat is associated with a policy, it:<o:p></o:p></a></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p>&nbsp;</o:p></span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><span style=3D"mso-bookmark:_MailEndCompose"><![if !supportLists]><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1F497D"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &q=
uot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:#1F497D">Instantiates the policy, if i=
t does not already exist<o:p></o:p></span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><span style=3D"mso-bookmark:_MailEndCompose"><![if !supportLists]><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1F497D"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &q=
uot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:#1F497D">Associates the prefix with th=
e policy<o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p>&nbsp;</o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D">BGP listeners can instantiate a finite number of policies (N). &nbs=
p;SO, what happens when a BGP listener has N policies
 instantiated and it receives an advertisement that would normally cause it=
 to instantiate another policy? Options are:<o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p>&nbsp;</o:p></span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><span style=3D"mso-bookmark:_MailEndCompose"><![if !supportLists]><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1F497D"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &q=
uot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:#1F497D">Tear down the session<o:p></o=
:p></span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><span style=3D"mso-bookmark:_MailEndCompose"><![if !supportLists]><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1F497D"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &q=
uot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:#1F497D">Discard the advertisement<o:p=
></o:p></span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><span style=3D"mso-bookmark:_MailEndCompose"><![if !supportLists]><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1F497D"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &q=
uot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:#1F497D">Install the route, but withou=
t the advertisement<o:p></o:p></span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><span style=3D"mso-bookmark:_MailEndCompose"><![if !supportLists]><=
span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;c=
olor:#1F497D"><span style=3D"mso-list:Ignore">-<span style=3D"font:7.0pt &q=
uot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;
</span></span></span><![endif]><span style=3D"font-size:11.0pt;font-family:=
&quot;Calibri&quot;,sans-serif;color:#1F497D">Do something else?<o:p></o:p>=
</span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p>&nbsp;</o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D">We should probably be explicit about the required behavior.<o:p></o=
:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p>&nbsp;</o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p>&nbsp;</o:p></span></span></p>
<p class=3D"MsoNormal"><span style=3D"mso-bookmark:_MailEndCompose"><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#=
1F497D"><o:p>&nbsp;</o:p></span></span></p>
<span style=3D"mso-bookmark:_MailEndCompose"></span>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Ron Bonica
<br>
<b>Sent:</b> Sunday, March 12, 2017 12:11 PM<br>
<b>To:</b> 'Susan Hares' &lt;shares@ndzh.com&gt;; EXT - luis.tomotaki@veriz=
on.com &lt;luis.tomotaki@verizon.com&gt;; 'Shitanshu Shah' &lt;shitanshu_sh=
ah@hotmail.com&gt;; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.=
org; idr@ietf.org<br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">This discussion might require a sligh=
tly higher bandwidth channel. Feel free to call me whenever you get a chanc=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;571 203 1704<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Susan Hares [<a href=3D"mailto=
:shares@ndzh.com">mailto:shares@ndzh.com</a>]
<br>
<b>Sent:</b> Wednesday, March 8, 2017 10:23 AM<br>
<b>To:</b> EXT - <a href=3D"mailto:luis.tomotaki@verizon.com">luis.tomotaki=
@verizon.com</a> &lt;<a href=3D"mailto:luis.tomotaki@verizon.com">luis.tomo=
taki@verizon.com</a>&gt;; 'Shitanshu Shah' &lt;<a href=3D"mailto:shitanshu_=
shah@hotmail.com">shitanshu_shah@hotmail.com</a>&gt;;
 Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net<=
/a>&gt;; <a href=3D"mailto:rtg-dir@ietf.org">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis:
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Thank you for letting me know you des=
ire for this feature.&nbsp; &nbsp;Since Ron had additional questions, I&#82=
17;ll let him start off this discussion.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Sue
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bounc=
es@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Tomotaki, Luis M<br>
<b>Sent:</b> Tuesday, March 7, 2017 11:11 PM<br>
<b>To:</b> Shitanshu Shah; Susan Hares; 'Ron Bonica'; <a href=3D"mailto:rtg=
-dir@ietf.org">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Ron and Sue,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">From a service provider perspective, =
exchanging the SLA information between the PE and CE would be very benefici=
al and could be widely used.&nbsp; I think this is
 particular important in service provider&#8217;s L3VPN networks where the =
customers or service providers currently do not have full visibility to the=
 QoS policy in the other end of the connection but still needs matching CE-=
PE SLA/QoS policies to achieve the correct
 two-way traffic prioritization behavior during congestion.&nbsp; In this e=
xample, once the SLA information exchange is standardized, my expectation i=
s that the different CE/PE vendors would be able to automatically update in=
 a vendor specific way, the SLA/QoS policies
 based on the SLA information provided via BGP.&nbsp; <o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D">Luis<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Shitanshu Shah [<a href=3D"mai=
lto:shitanshu_shah@hotmail.com">mailto:shitanshu_shah@hotmail.com</a>]
<br>
<b>Sent:</b> Monday, March 6, 2017 9:31 AM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.c=
om</a>&gt;; 'Ron Bonica' &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica=
@juniper.net</a>&gt;;
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-idr-sla-exchange.all@ietf.org">
draft-ietf-idr-sla-exchange.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.or=
g">idr@ietf.org</a><br>
<b>Subject:</b> [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchang=
e-10<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div id=3D"divtagdefaultwrapper">
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i Sue,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">F=
ollowing is what I had responded to Ron. Hopefully&nbsp;that addresses/clar=
ifies.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
o break it down in two point response,<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">1=
) This draft is not changing how SLA is established at first place. The dra=
ft&nbsp;is providing a method to convey this a priori established&nbsp;SLA =
to help reduce lot of manual complexities and errors to
 admin. Thus given a knowledge of what SLA is established, in general devic=
es should be capable to support that established&nbsp;SLA.<o:p></o:p></span=
></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">2=
) If there still are any issues in implementing exchanged SLA in forwarding=
, we think they either are implementation specific or&nbsp;of temporary nat=
ure where for example enough resources not available
 at any specific point of a time.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">W=
e feel that in current state of the draft, it can be largely useful in depl=
oyments.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">O=
ne can imagine though even establishment of SLA also can&nbsp;be done via e=
xchanging it over bgp. However, negotiation of SLA does not have to be club=
bed with exchange of SLA. Negotiation of SLA is not
 in this scope.<o:p></o:p></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
o:p>&nbsp;</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Shitanshu<o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Calibri&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span><=
/p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">
<hr size=3D"2" width=3D"98%" align=3D"center">
</span></div>
<div id=3D"divRplyFwdMsg">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Susan =
Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br>
<b>Sent:</b> Saturday, March 4, 2017 8:31 AM<br>
<b>To:</b> 'Ron Bonica'; 'Shitanshu Shah'; <a href=3D"mailto:rtg-dir@ietf.o=
rg">rtg-dir@ietf.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">
<o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Shitanshu:
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Please address Ron&#8217;s comment about widely dep=
loyed.&nbsp; I believe this was part of Alvaro&#8217;s comments.
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Sue
</span><span style=3D"color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,=
sans-serif;color:black">From:</span></b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black"> rtg-dir
 [<a href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-dir-bounces@ietf.o=
rg</a>] <b>
On Behalf Of </b>Ron Bonica<br>
<b>Sent:</b> Thursday, February 23, 2017 12:07 PM<br>
<b>To:</b> Shitanshu Shah; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf=
.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"color:black"><o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"color:black">&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">Hello,</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">The draft is internally consistent. But given what =
is left out of scope, I wonder if the new attributes
 will ever be widely deployed.</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span><span style=3D"c=
olor:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:#1F497D">&nbsp;</span><span style=3D"color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black"><br>
This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.</span><span=
 style=3D"color:black"><o:p></o:p></span></p>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
though this is one desired use of exchanging SLA content, the draft focuses=
 on transporting SLA content from the SLA Producer to the SLA Consumer. Pro=
cessing of the QoS attribute content,
 at the SLA Consumer, is outside the scope of this document.</span><span st=
yle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><o:p></o:p><=
/span></p>
<p style=3D"min-height:13px"><span style=3D"font-size:8.5pt;font-family:Men=
lo;color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibri&quot;=
,sans-serif;color:black"><o:p></o:p></span></p>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Let me know if you have a suggestion to make description clearer in Section=
 1 and 2 to highlight this.</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">I also assume that a) it takes time to provision clas=
s of service forwarding classes and b) the number
 of forwarding classes that can be provisioned are finite. What does the BG=
P listener do when the number of forwarding classes requested exceeds its c=
apacity to deliver?&nbsp;</span><span style=3D"color:black"><o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Since scope of the document is to transport SLA content from the SLA Produc=
er to the SLA Consumer, the document considers error handling in the contex=
t of transporting data and thus any
 formating errors and semantics errors within that context. Any errors in t=
he context of processing QoS attribute content at the SLA Consumer is outsi=
de the scope of the document.</span><span style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif;color:black"><o:p></o:p></span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-size:8.5pt;font-famil=
y:Menlo;color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto"><span style=3D"font-size:10.0pt;font-family:&quot;Calibri&quot;,sa=
ns-serif;color:black">&nbsp;</span><span style=3D"color:black"><o:p></o:p><=
/span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

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To: Ronald Bonica <rbonica@juniper.net>
Cc: "EXT - luis.tomotaki@verizon.com" <luis.tomotaki@verizon.com>, Susan Hares <shares@ndzh.com>,  "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "idr@ietf.org" <idr@ietf.org>,  "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>,  Shitanshu Shah <shitanshu_shah@hotmail.com>
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Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Hi Ron,

The behaviour in the case you are bringing up could be a local policy.

* ignore-when-overlap
* overwrite-when-overlap

Overlap means with local policy. Optionally you also can have a route map
attach to both and apply such policy on a per prefix basis.

Cheers
R.

On Mar 20, 2017 2:29 PM, "Ron Bonica" <rbonica@juniper.net> wrote:

> Folks,
>
>
>
> Luis and I spoke on Friday. The following is a summary of our conversatio=
n:
>
>
>
> Draft-ietf-idr-sla-exchange proposes a mechanism through which a BGP
> speaker associates a forwarding policy with a prefix. When a BGP listener
> receives an advertisement that is associated with a policy, it:
>
>
>
> -          Instantiates the policy, if it does not already exist
>
> -          Associates the prefix with the policy
>
>
>
> BGP listeners can instantiate a finite number of policies (N).  SO, what
> happens when a BGP listener has N policies instantiated and it receives a=
n
> advertisement that would normally cause it to instantiate another policy?
> Options are:
>
>
>
> -          Tear down the session
>
> -          Discard the advertisement
>
> -          Install the route, but without the advertisement
>
> -          Do something else?
>
>
>
> We should probably be explicit about the required behavior.
>
>
>
>                                                                      Ron
>
>
>
>
>
> *From:* Ron Bonica
> *Sent:* Sunday, March 12, 2017 12:11 PM
> *To:* 'Susan Hares' <shares@ndzh.com>; EXT - luis.tomotaki@verizon.com <
> luis.tomotaki@verizon.com>; 'Shitanshu Shah' <shitanshu_shah@hotmail.com>=
;
> rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
> *Subject:* RE: [Idr] [RTG-DIR] RtgDir review:
> draft-ietf-idr-sla-exchange-10
>
>
>
> Luis,
>
>
>
> This discussion might require a slightly higher bandwidth channel. Feel
> free to call me whenever you get a chance.
>
>
>
>                                                                  Ron
>
>                                                                   571 203
> 1704 <(571)%20203-1704>
>
>
>
>
>
> *From:* Susan Hares [mailto:shares@ndzh.com <shares@ndzh.com>]
> *Sent:* Wednesday, March 8, 2017 10:23 AM
> *To:* EXT - luis.tomotaki@verizon.com <luis.tomotaki@verizon.com>;
> 'Shitanshu Shah' <shitanshu_shah@hotmail.com>; Ron Bonica <
> rbonica@juniper.net>; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.
> all@ietf.org; idr@ietf.org
> *Subject:* RE: [Idr] [RTG-DIR] RtgDir review:
> draft-ietf-idr-sla-exchange-10
>
>
>
> Luis:
>
>
>
> Thank you for letting me know you desire for this feature.   Since Ron ha=
d
> additional questions, I=E2=80=99ll let him start off this discussion.
>
>
>
> Sue
>
>
>
> *From:* Idr [mailto:idr-bounces@ietf.org <idr-bounces@ietf.org>] *On
> Behalf Of *Tomotaki, Luis M
> *Sent:* Tuesday, March 7, 2017 11:11 PM
> *To:* Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org;
> draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
> *Subject:* Re: [Idr] [RTG-DIR] RtgDir review:
> draft-ietf-idr-sla-exchange-10
>
>
>
> Ron and Sue,
>
> From a service provider perspective, exchanging the SLA information
> between the PE and CE would be very beneficial and could be widely used. =
 I
> think this is particular important in service provider=E2=80=99s L3VPN ne=
tworks
> where the customers or service providers currently do not have full
> visibility to the QoS policy in the other end of the connection but still
> needs matching CE-PE SLA/QoS policies to achieve the correct two-way
> traffic prioritization behavior during congestion.  In this example, once
> the SLA information exchange is standardized, my expectation is that the
> different CE/PE vendors would be able to automatically update in a vendor
> specific way, the SLA/QoS policies based on the SLA information provided
> via BGP.
>
>
>
> Luis
>
>
>
> *From:* Shitanshu Shah [mailto:shitanshu_shah@hotmail.com
> <shitanshu_shah@hotmail.com>]
> *Sent:* Monday, March 6, 2017 9:31 AM
> *To:* Susan Hares <shares@ndzh.com>; 'Ron Bonica' <rbonica@juniper.net>;
> rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
> *Subject:* [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-1=
0
>
>
>
> Hi Sue,
>
>
>
> Following is what I had responded to Ron. Hopefully that
> addresses/clarifies.
>
>
>
> To break it down in two point response,
>
>
>
> 1) This draft is not changing how SLA is established at first place. The
> draft is providing a method to convey this a priori established SLA to he=
lp
> reduce lot of manual complexities and errors to admin. Thus given a
> knowledge of what SLA is established, in general devices should be capabl=
e
> to support that established SLA.
>
>
>
>
>
> 2) If there still are any issues in implementing exchanged SLA in
> forwarding, we think they either are implementation specific or of
> temporary nature where for example enough resources not available at any
> specific point of a time.
>
>
>
> We feel that in current state of the draft, it can be largely useful in
> deployments.
>
>
>
>
>
>
>
> One can imagine though even establishment of SLA also can be done via
> exchanging it over bgp. However, negotiation of SLA does not have to be
> clubbed with exchange of SLA. Negotiation of SLA is not in this scope.
>
>
>
> Regards,
>
> Shitanshu
>
>
> ------------------------------
>
> *From:* Susan Hares <shares@ndzh.com>
> *Sent:* Saturday, March 4, 2017 8:31 AM
> *To:* 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org;
> draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
> *Subject:* RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
>
>
>
> Shitanshu:
>
>
>
> Please address Ron=E2=80=99s comment about widely deployed.  I believe th=
is was
> part of Alvaro=E2=80=99s comments.
>
>
>
> Sue
>
>
>
> *From:* rtg-dir [mailto:rtg-dir-bounces@ietf.org
> <rtg-dir-bounces@ietf.org>] * On Behalf Of *Ron Bonica
> *Sent:* Thursday, February 23, 2017 12:07 PM
> *To:* Shitanshu Shah; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.
> all@ietf.org; idr@ietf.org
> *Subject:* Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
>
>
>
> Hello,
>
>
>
> The draft is internally consistent. But given what is left out of scope, =
I
> wonder if the new attributes will ever be widely deployed.
>
>
>
>
> Ron
>
>
>
>
>
>
> This document might benefit from discussion of operational issues. I
> assume that when a BGP listener learns a route with the SLA Exchange
> Attribute, it provisions class of service forwarding classes on interface=
s.
>
>
>
> ##svshah, though this is one desired use of exchanging SLA content, the
> draft focuses on transporting SLA content from the SLA Producer to the SL=
A
> Consumer. Processing of the QoS attribute content, at the SLA Consumer, i=
s
> outside the scope of this document.
>
>
>
> ##svshah, Let me know if you have a suggestion to make description cleare=
r
> in Section 1 and 2 to highlight this.
>
>
>
>
>
> I also assume that a) it takes time to provision class of service
> forwarding classes and b) the number of forwarding classes that can be
> provisioned are finite. What does the BGP listener do when the number of
> forwarding classes requested exceeds its capacity to deliver?
>
>
>
> ##svshah, Since scope of the document is to transport SLA content from th=
e
> SLA Producer to the SLA Consumer, the document considers error handling i=
n
> the context of transporting data and thus any formating errors and
> semantics errors within that context. Any errors in the context of
> processing QoS attribute content at the SLA Consumer is outside the scope
> of the document.
>
>
>
>
>
>
>
> _______________________________________________
> Idr mailing list
> Idr@ietf.org
> https://www.ietf.org/mailman/listinfo/idr
>
>

--001a113ecee8b87c7f054b2a02df
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Hi Ron,<div dir=3D"auto"><br></div><div dir=3D"auto">The =
behaviour in the case you are bringing up could be a local policy.</div><di=
v dir=3D"auto"><br></div><div dir=3D"auto">* ignore-when-overlap</div><div =
dir=3D"auto">* overwrite-when-overlap</div><div dir=3D"auto"><br></div><div=
 dir=3D"auto">Overlap means with local policy. Optionally you also can have=
 a route map attach to both and apply such policy on a per prefix basis.</d=
iv><div dir=3D"auto"><br></div><div dir=3D"auto">Cheers</div><div dir=3D"au=
to">R.</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"=
>On Mar 20, 2017 2:29 PM, &quot;Ron Bonica&quot; &lt;<a href=3D"mailto:rbon=
ica@juniper.net">rbonica@juniper.net</a>&gt; wrote:<br type=3D"attribution"=
><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1=
px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"m_6628939087420665936WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Folks,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Luis and I spoke on Friday. The follo=
wing is a summary of our conversation:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Draft-ietf-idr-sla-exchange proposes =
a mechanism through which a BGP speaker associates a forwarding policy with=
 a prefix.
<a name=3D"m_6628939087420665936__MailEndCompose">When a BGP listener recei=
ves an advertisement that is associated with a policy, it:<u></u><u></u></a=
></span></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></sp=
an></p>
<p class=3D"m_6628939087420665936MsoListParagraph"><span><u></u><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Instantiates the policy, if it d=
oes not already exist<u></u><u></u></span></span></p>
<p class=3D"m_6628939087420665936MsoListParagraph"><span><u></u><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Associates the prefix with the p=
olicy<u></u><u></u></span></span></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></sp=
an></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">BGP listeners can instantiate a=
 finite number of policies (N).=C2=A0 SO, what happens when a BGP listener =
has N policies
 instantiated and it receives an advertisement that would normally cause it=
 to instantiate another policy? Options are:<u></u><u></u></span></span></p=
>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></sp=
an></p>
<p class=3D"m_6628939087420665936MsoListParagraph"><span><u></u><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Tear down the session<u></u><u><=
/u></span></span></p>
<p class=3D"m_6628939087420665936MsoListParagraph"><span><u></u><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Discard the advertisement<u></u>=
<u></u></span></span></p>
<p class=3D"m_6628939087420665936MsoListParagraph"><span><u></u><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Install the route, but without t=
he advertisement<u></u><u></u></span></span></p>
<p class=3D"m_6628939087420665936MsoListParagraph"><span><u></u><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f49=
7d"><span>-<span style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span><u></u><span style=3D"font-size:11.0pt;font-family:&qu=
ot;Calibri&quot;,sans-serif;color:#1f497d">Do something else?<u></u><u></u>=
</span></span></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></sp=
an></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">We should probably be explicit =
about the required behavior.<u></u><u></u></span></span></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></sp=
an></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 Ron<u></u><u></u></span></span></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></sp=
an></p>
<p class=3D"MsoNormal"><span><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></sp=
an></p>
<span></span>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Ron Bonica
<br>
<b>Sent:</b> Sunday, March 12, 2017 12:11 PM<br>
<b>To:</b> &#39;Susan Hares&#39; &lt;<a href=3D"mailto:shares@ndzh.com" tar=
get=3D"_blank">shares@ndzh.com</a>&gt;; EXT - <a href=3D"mailto:luis.tomota=
ki@verizon.com" target=3D"_blank">luis.tomotaki@verizon.com</a> &lt;<a href=
=3D"mailto:luis.tomotaki@verizon.com" target=3D"_blank">luis.tomotaki@veriz=
on.com</a>&gt;; &#39;Shitanshu Shah&#39; &lt;<a href=3D"mailto:shitanshu_sh=
ah@hotmail.com" target=3D"_blank">shitanshu_shah@hotmail.com</a>&gt;; <a hr=
ef=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@ietf.org</a>; <a h=
ref=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org" target=3D"_blank">d=
raft-ietf-idr-sla-exchange.<wbr>all@ietf.org</a>; <a href=3D"mailto:idr@iet=
f.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Luis,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">This discussion might require a sligh=
tly higher bandwidth channel. Feel free to call me whenever you get a chanc=
e.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0 Ron<u></u><u></=
u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<a href=3D"tel=
:(571)%20203-1704" value=3D"+15712031704" target=3D"_blank">571 203 1704</a=
><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Susan Hares [<a href=3D"mailto=
:shares@ndzh.com" target=3D"_blank">mailto:shares@ndzh.com</a>]
<br>
<b>Sent:</b> Wednesday, March 8, 2017 10:23 AM<br>
<b>To:</b> EXT - <a href=3D"mailto:luis.tomotaki@verizon.com" target=3D"_bl=
ank">luis.tomotaki@verizon.com</a> &lt;<a href=3D"mailto:luis.tomotaki@veri=
zon.com" target=3D"_blank">luis.tomotaki@verizon.com</a>&gt;; &#39;Shitansh=
u Shah&#39; &lt;<a href=3D"mailto:shitanshu_shah@hotmail.com" target=3D"_bl=
ank">shitanshu_shah@hotmail.com</a>&gt;;
 Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net" target=3D"_blank">rb=
onica@juniper.net</a>&gt;; <a href=3D"mailto:rtg-dir@ietf.org" target=3D"_b=
lank">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org" target=3D"_blank">draft-ietf-idr-sla-exchange.<wbr>all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Luis:
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Thank you for letting me know you des=
ire for this feature.=C2=A0 =C2=A0Since Ron had additional questions, I=E2=
=80=99ll let him start off this discussion.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Sue
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;f=
ont-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bounc=
es@ietf.org" target=3D"_blank">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Tomotaki, Luis M<br>
<b>Sent:</b> Tuesday, March 7, 2017 11:11 PM<br>
<b>To:</b> Shitanshu Shah; Susan Hares; &#39;Ron Bonica&#39;; <a href=3D"ma=
ilto:rtg-dir@ietf.org" target=3D"_blank">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org" target=3D"_blank">draft-ietf-idr-sla-exchange.<wbr>all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Ron and Sue,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">From a service provider perspective, =
exchanging the SLA information between the PE and CE would be very benefici=
al and could be widely used.=C2=A0 I think this is
 particular important in service provider=E2=80=99s L3VPN networks where th=
e customers or service providers currently do not have full visibility to t=
he QoS policy in the other end of the connection but still needs matching C=
E-PE SLA/QoS policies to achieve the correct
 two-way traffic prioritization behavior during congestion.=C2=A0 In this e=
xample, once the SLA information exchange is standardized, my expectation i=
s that the different CE/PE vendors would be able to automatically update in=
 a vendor specific way, the SLA/QoS policies
 based on the SLA information provided via BGP.=C2=A0 <u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Luis<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> Shitanshu Shah [<a href=3D"mai=
lto:shitanshu_shah@hotmail.com" target=3D"_blank">mailto:shitanshu_shah@<wb=
r>hotmail.com</a>]
<br>
<b>Sent:</b> Monday, March 6, 2017 9:31 AM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_bl=
ank">shares@ndzh.com</a>&gt;; &#39;Ron Bonica&#39; &lt;<a href=3D"mailto:rb=
onica@juniper.net" target=3D"_blank">rbonica@juniper.net</a>&gt;;
<a href=3D"mailto:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@ietf.org</a>;=
 <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org" target=3D"_bla=
nk">
draft-ietf-idr-sla-exchange.<wbr>all@ietf.org</a>; <a href=3D"mailto:idr@ie=
tf.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchang=
e-10<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div id=3D"m_6628939087420665936divtagdefaultwrapper">
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">H=
i Sue,<u></u><u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">F=
ollowing is what I had responded to Ron. Hopefully=C2=A0that addresses/clar=
ifies.<u></u><u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">T=
o break it down in two point response,<u></u><u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">1=
) This draft is not changing how SLA is established at first place. The dra=
ft=C2=A0is providing a method to convey this a priori established=C2=A0SLA =
to help reduce lot of manual complexities and errors to
 admin. Thus given a knowledge of what SLA is established, in general devic=
es should be capable to support that established=C2=A0SLA.<u></u><u></u></s=
pan></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">2=
) If there still are any issues in implementing exchanged SLA in forwarding=
, we think they either are implementation specific or=C2=A0of temporary nat=
ure where for example enough resources not available
 at any specific point of a time.<u></u><u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">W=
e feel that in current state of the draft, it can be largely useful in depl=
oyments.<u></u><u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">O=
ne can imagine though even establishment of SLA also can=C2=A0be done via e=
xchanging it over bgp. However, negotiation of SLA does not have to be club=
bed with exchange of SLA. Negotiation of SLA is not
 in this scope.<u></u><u></u></span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><=
u></u>=C2=A0<u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Regards,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">Shitanshu<u></u><u></u></span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Calibri&quot;,sans-serif;color:black"><u></u>=C2=A0<u></u></spa=
n></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black">
<hr size=3D"2" width=3D"98%" align=3D"center">
</span></div>
<div id=3D"m_6628939087420665936divRplyFwdMsg">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:black"> Susan =
Hares &lt;<a href=3D"mailto:shares@ndzh.com" target=3D"_blank">shares@ndzh.=
com</a>&gt;<br>
<b>Sent:</b> Saturday, March 4, 2017 8:31 AM<br>
<b>To:</b> &#39;Ron Bonica&#39;; &#39;Shitanshu Shah&#39;; <a href=3D"mailt=
o:rtg-dir@ietf.org" target=3D"_blank">rtg-dir@ietf.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org" target=3D"_blan=
k">draft-ietf-idr-sla-exchange.<wbr>all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:blac=
k">
<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif;color:black">=C2=A0<u></u><u></u></span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Shitanshu:
</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Please address Ron=E2=80=99s comment =
about widely deployed.=C2=A0 I believe this was part of Alvaro=E2=80=99s co=
mments.
</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Sue
</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<div>
<div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"> rtg-dir
 [<a href=3D"mailto:rtg-dir-bounces@ietf.org" target=3D"_blank">mailto:rtg-=
dir-bounces@ietf.<wbr>org</a>] <b>
On Behalf Of </b>Ron Bonica<br>
<b>Sent:</b> Thursday, February 23, 2017 12:07 PM<br>
<b>To:</b> Shitanshu Shah; <a href=3D"mailto:rtg-dir@ietf.org" target=3D"_b=
lank">rtg-dir@ietf.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org" target=3D"_blan=
k">draft-ietf-idr-sla-exchange.<wbr>all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org" target=3D"_blank">idr@ietf.org</a><br>
<b>Subject:</b> Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"color:black"><u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"color:black">=C2=A0<u></u><u></u></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">Hello,</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">The draft is internally consistent. B=
ut given what is left out of scope, I wonder if the new attributes
 will ever be widely deployed.</span><span style=3D"color:black"><u></u><u>=
</u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0<wbr>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 Ron</span><span style=3D"color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:#1f497d">=C2=A0</span><span style=3D"color:bla=
ck"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black"><br>
This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.</span><span=
 style=3D"color:black"><u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
though this is one desired use of exchanging SLA content, the draft focuses=
 on transporting SLA content from the SLA Producer to the SLA Consumer. Pro=
cessing of the QoS attribute content,
 at the SLA Consumer, is outside the scope of this document.</span><span st=
yle=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><u></u><u></=
u></span></p>
<p style=3D"min-height:13px"><span style=3D"font-size:8.5pt;font-family:Men=
lo;color:black">=C2=A0</span><span style=3D"font-family:&quot;Calibri&quot;=
,sans-serif;color:black"><u></u><u></u></span></p>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Let me know if you have a suggestion to make description clearer in Section=
 1 and 2 to highlight this.</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">I also assume that a) it takes time to =
provision class of service forwarding classes and b) the number
 of forwarding classes that can be provisioned are finite. What does the BG=
P listener do when the number of forwarding classes requested exceeds its c=
apacity to deliver?=C2=A0</span><span style=3D"color:black"><u></u><u></u><=
/span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt;font-family:Menlo;color:black">##svshah, =
Since scope of the document is to transport SLA content from the SLA Produc=
er to the SLA Consumer, the document considers error handling in the contex=
t of transporting data and thus any
 formating errors and semantics errors within that context. Any errors in t=
he context of processing QoS attribute content at the SLA Consumer is outsi=
de the scope of the document.</span><span style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif;color:black"><u></u><u></u></span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-size:8.5pt;font-famil=
y:Menlo;color:black">=C2=A0</span><span style=3D"font-family:&quot;Calibri&=
quot;,sans-serif;color:black"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;color:black">=C2=A0</span><span style=3D"color:black=
"><u></u><u></u></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

<br>______________________________<wbr>_________________<br>
Idr mailing list<br>
<a href=3D"mailto:Idr@ietf.org">Idr@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/idr" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/idr</a><br>
<br></blockquote></div></div>

--001a113ecee8b87c7f054b2a02df--


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From: "Susan Hares" <shares@ndzh.com>
To: "'Ron Bonica'" <rbonica@juniper.net>, <luis.tomotaki@verizon.com>, "'Shitanshu Shah'" <shitanshu_shah@hotmail.com>, <rtg-dir@ietf.org>, <draft-ietf-idr-sla-exchange.all@ietf.org>, <idr@ietf.org>
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Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Ron: 

 

Thank you for taking the time to talk with Luis, and for giving us the
concise and informative summary. 

 

Sue 

 

From: Ron Bonica [mailto:rbonica@juniper.net] 
Sent: Monday, March 20, 2017 9:30 AM
To: Susan Hares; EXT - luis.tomotaki@verizon.com; 'Shitanshu Shah';
rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Folks,

 

Luis and I spoke on Friday. The following is a summary of our conversation:

 

Draft-ietf-idr-sla-exchange proposes a mechanism through which a BGP speaker
associates a forwarding policy with a prefix. When a BGP listener receives
an advertisement that is associated with a policy, it:

 

-          Instantiates the policy, if it does not already exist

-          Associates the prefix with the policy

 

BGP listeners can instantiate a finite number of policies (N).  SO, what
happens when a BGP listener has N policies instantiated and it receives an
advertisement that would normally cause it to instantiate another policy?
Options are:

 

-          Tear down the session

-          Discard the advertisement

-          Install the route, but without the advertisement

-          Do something else?

 

We should probably be explicit about the required behavior.

 

                                                                     Ron

 

 

From: Ron Bonica 
Sent: Sunday, March 12, 2017 12:11 PM
To: 'Susan Hares' <shares@ndzh.com>; EXT - luis.tomotaki@verizon.com
<luis.tomotaki@verizon.com>; 'Shitanshu Shah' <shitanshu_shah@hotmail.com>;
rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Luis,

 

This discussion might require a slightly higher bandwidth channel. Feel free
to call me whenever you get a chance.

 

                                                                 Ron

                                                                  571 203
1704

 

 

From: Susan Hares [mailto:shares@ndzh.com] 
Sent: Wednesday, March 8, 2017 10:23 AM
To: EXT - luis.tomotaki@verizon.com <luis.tomotaki@verizon.com>; 'Shitanshu
Shah' <shitanshu_shah@hotmail.com>; Ron Bonica <rbonica@juniper.net>;
rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Luis: 

 

Thank you for letting me know you desire for this feature.   Since Ron had
additional questions, I'll let him start off this discussion. 

 

Sue 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Tomotaki, Luis M
Sent: Tuesday, March 7, 2017 11:11 PM
To: Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Ron and Sue,

>From a service provider perspective, exchanging the SLA information between
the PE and CE would be very beneficial and could be widely used.  I think
this is particular important in service provider's L3VPN networks where the
customers or service providers currently do not have full visibility to the
QoS policy in the other end of the connection but still needs matching CE-PE
SLA/QoS policies to achieve the correct two-way traffic prioritization
behavior during congestion.  In this example, once the SLA information
exchange is standardized, my expectation is that the different CE/PE vendors
would be able to automatically update in a vendor specific way, the SLA/QoS
policies based on the SLA information provided via BGP.  

 

Luis

 

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com] 
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com>; 'Ron Bonica' <rbonica@juniper.net>;
rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Hi Sue,

 

Following is what I had responded to Ron. Hopefully that
addresses/clarifies.

 

To break it down in two point response,

 

1) This draft is not changing how SLA is established at first place. The
draft is providing a method to convey this a priori established SLA to help
reduce lot of manual complexities and errors to admin. Thus given a
knowledge of what SLA is established, in general devices should be capable
to support that established SLA.

 

 

2) If there still are any issues in implementing exchanged SLA in
forwarding, we think they either are implementation specific or of temporary
nature where for example enough resources not available at any specific
point of a time.

 

We feel that in current state of the draft, it can be largely useful in
deployments.

 

 

 

One can imagine though even establishment of SLA also can be done via
exchanging it over bgp. However, negotiation of SLA does not have to be
clubbed with exchange of SLA. Negotiation of SLA is not in this scope.

 

Regards,

Shitanshu

 

  _____  

From: Susan Hares <shares@ndzh.com>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10 

 

Shitanshu: 

 

Please address Ron's comment about widely deployed.  I believe this was part
of Alvaro's comments. 

 

Sue 

 

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org;
draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

 

Hello,

 

The draft is internally consistent. But given what is left out of scope, I
wonder if the new attributes will ever be widely deployed.

 

 
Ron

 

 


This document might benefit from discussion of operational issues. I assume
that when a BGP listener learns a route with the SLA Exchange Attribute, it
provisions class of service forwarding classes on interfaces.

 

##svshah, though this is one desired use of exchanging SLA content, the
draft focuses on transporting SLA content from the SLA Producer to the SLA
Consumer. Processing of the QoS attribute content, at the SLA Consumer, is
outside the scope of this document.

 

##svshah, Let me know if you have a suggestion to make description clearer
in Section 1 and 2 to highlight this.

 

 

I also assume that a) it takes time to provision class of service forwarding
classes and b) the number of forwarding classes that can be provisioned are
finite. What does the BGP listener do when the number of forwarding classes
requested exceeds its capacity to deliver? 

 

##svshah, Since scope of the document is to transport SLA content from the
SLA Producer to the SLA Consumer, the document considers error handling in
the context of transporting data and thus any formating errors and semantics
errors within that context. Any errors in the context of processing QoS
attribute content at the SLA Consumer is outside the scope of the document.

 

 

 


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Ron: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you for taking the time to talk with Luis, and for giving us =
the concise and informative summary. <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Ron Bonica [mailto:rbonica@juniper.net] <br><b>Sent:</b> Monday, March =
20, 2017 9:30 AM<br><b>To:</b> Susan Hares; EXT - =
luis.tomotaki@verizon.com; 'Shitanshu Shah'; rtg-dir@ietf.org; =
draft-ietf-idr-sla-exchange.all@ietf.org; =
idr@ietf.org<br><b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Folks,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Luis and I spoke on Friday. The following is a summary of our =
conversation:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Draft-ietf-idr-sla-exchange proposes a mechanism through which a BGP =
speaker associates a forwarding policy with a prefix. <a =
name=3D"_MailEndCompose">When a BGP listener receives an advertisement =
that is associated with a policy, it:<o:p></o:p></a></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-</span><span =
style=3D'font-size:7.0pt;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Instantiates the policy, if it does not already =
exist<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-</span><span =
style=3D'font-size:7.0pt;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Associates the prefix with the policy<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>BGP listeners can instantiate a finite number of policies (N). =
&nbsp;SO, what happens when a BGP listener has N policies instantiated =
and it receives an advertisement that would normally cause it to =
instantiate another policy? Options are:<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-</span><span =
style=3D'font-size:7.0pt;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Tear down the session<o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-</span><span =
style=3D'font-size:7.0pt;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Discard the advertisement<o:p></o:p></span></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-</span><span =
style=3D'font-size:7.0pt;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Install the route, but without the =
advertisement<o:p></o:p></span></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>-</span><span =
style=3D'font-size:7.0pt;color:#1F497D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp; </span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Do something else?<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>We should probably be explicit about the required =
behavior.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Ron<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> Ron =
Bonica <br><b>Sent:</b> Sunday, March 12, 2017 12:11 PM<br><b>To:</b> =
'Susan Hares' &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;; EXT - <a =
href=3D"mailto:luis.tomotaki@verizon.com">luis.tomotaki@verizon.com</a> =
&lt;<a =
href=3D"mailto:luis.tomotaki@verizon.com">luis.tomotaki@verizon.com</a>&g=
t;; 'Shitanshu Shah' &lt;<a =
href=3D"mailto:shitanshu_shah@hotmail.com">shitanshu_shah@hotmail.com</a>=
&gt;; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> RE: =
[Idr] [RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Luis,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>This discussion might require a slightly higher bandwidth channel. =
Feel free to call me whenever you get a chance.<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;571 203 1704<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt'><div><div style=3D'border:none;border-top:solid #E1E1E1 =
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> Susan =
Hares [<a href=3D"mailto:shares@ndzh.com">mailto:shares@ndzh.com</a>] =
<br><b>Sent:</b> Wednesday, March 8, 2017 10:23 AM<br><b>To:</b> EXT - =
<a =
href=3D"mailto:luis.tomotaki@verizon.com">luis.tomotaki@verizon.com</a> =
&lt;<a =
href=3D"mailto:luis.tomotaki@verizon.com">luis.tomotaki@verizon.com</a>&g=
t;; 'Shitanshu Shah' &lt;<a =
href=3D"mailto:shitanshu_shah@hotmail.com">shitanshu_shah@hotmail.com</a>=
&gt;; Ron Bonica &lt;<a =
href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net</a>&gt;; <a =
href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> RE: =
[Idr] [RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Luis: <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Thank you for letting me know you desire for this feature.&nbsp; =
&nbsp;Since Ron had additional questions, I&#8217;ll let him start off =
this discussion. <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue <o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [<a =
href=3D"mailto:idr-bounces@ietf.org">mailto:idr-bounces@ietf.org</a>] =
<b>On Behalf Of </b>Tomotaki, Luis M<br><b>Sent:</b> Tuesday, March 7, =
2017 11:11 PM<br><b>To:</b> Shitanshu Shah; Susan Hares; 'Ron Bonica'; =
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> Re: =
[Idr] [RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Ron and Sue,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>From a service provider perspective, exchanging the SLA information =
between the PE and CE would be very beneficial and could be widely =
used.&nbsp; I think this is particular important in service =
provider&#8217;s L3VPN networks where the customers or service providers =
currently do not have full visibility to the QoS policy in the other end =
of the connection but still needs matching CE-PE SLA/QoS policies to =
achieve the correct two-way traffic prioritization behavior during =
congestion.&nbsp; In this example, once the SLA information exchange is =
standardized, my expectation is that the different CE/PE vendors would =
be able to automatically update in a vendor specific way, the SLA/QoS =
policies based on the SLA information provided via BGP.&nbsp; =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Luis<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span=
></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> Shitanshu =
Shah [<a =
href=3D"mailto:shitanshu_shah@hotmail.com">mailto:shitanshu_shah@hotmail.=
com</a>] <br><b>Sent:</b> Monday, March 6, 2017 9:31 AM<br><b>To:</b> =
Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;; 'Ron Bonica' =
&lt;<a href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net</a>&gt;; =
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> [E] Re: =
[RTG-DIR] RtgDir review: =
draft-ietf-idr-sla-exchange-10<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div =
id=3Ddivtagdefaultwrapper><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Hi =
Sue,<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Following is =
what I had responded to Ron. Hopefully&nbsp;that =
addresses/clarifies.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>To break it =
down in two point response,<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>1) This draft =
is not changing how SLA is established at first place. The draft&nbsp;is =
providing a method to convey this a priori established&nbsp;SLA to help =
reduce lot of manual complexities and errors to admin. Thus given a =
knowledge of what SLA is established, in general devices should be =
capable to support that =
established&nbsp;SLA.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>2) If there =
still are any issues in implementing exchanged SLA in forwarding, we =
think they either are implementation specific or&nbsp;of temporary =
nature where for example enough resources not available at any specific =
point of a time.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>We feel that in =
current state of the draft, it can be largely useful in =
deployments.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>One can imagine =
though even establishment of SLA also can&nbsp;be done via exchanging it =
over bgp. However, negotiation of SLA does not have to be clubbed with =
exchange of SLA. Negotiation of SLA is not in this =
scope.<o:p></o:p></span></p><p><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Regards,<o:p></o=
:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>Shitanshu<o:p></=
o:p></span></p></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p>&nbsp;</o:p=
></span></p><div><div class=3DMsoNormal align=3Dcenter =
style=3D'text-align:center'><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><hr size=3D2 =
width=3D"98%" align=3Dcenter></span></div><div id=3DdivRplyFwdMsg><p =
class=3DMsoNormal><b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
>From:</span></b><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
> Susan Hares &lt;<a =
href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br><b>Sent:</b> =
Saturday, March 4, 2017 8:31 AM<br><b>To:</b> 'Ron Bonica'; 'Shitanshu =
Shah'; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> RE: =
[RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'> =
<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'font-family:"Calibri","sans-serif";color:black'>&nbsp;<o:p></o:p=
></span></p></div></div><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Shitanshu: </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Please address Ron&#8217;s comment about widely deployed.&nbsp; I =
believe this was part of Alvaro&#8217;s comments. </span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Sue </span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
From:</span></b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>=
 rtg-dir [<a =
href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-dir-bounces@ietf.org<=
/a>] <b>On Behalf Of </b>Ron Bonica<br><b>Sent:</b> Thursday, February =
23, 2017 12:07 PM<br><b>To:</b> Shitanshu Shah; <a =
href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a =
href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-s=
la-exchange.all@ietf.org</a>; <a =
href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br><b>Subject:</b> Re: =
[RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10</span><span =
style=3D'color:black'><o:p></o:p></span></p></div></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'color:black'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hello,</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>The draft is internally consistent. But given what is left out of =
scope, I wonder if the new attributes will ever be widely =
deployed.</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span><span =
style=3D'color:black'><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span style=3D'color:black'><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
><br>This document might benefit from discussion of operational issues. =
I assume that when a BGP listener learns a route with the SLA Exchange =
Attribute, it provisions class of service forwarding classes on =
interfaces.</span><span =
style=3D'color:black'><o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, though =
this is one desired use of exchanging SLA content, the draft focuses on =
transporting SLA content from the SLA Producer to the SLA Consumer. =
Processing of the QoS attribute content, at the SLA Consumer, is outside =
the scope of this document.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p style=3D'min-height:13px'><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>&nbsp;</span><spa=
n =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, Let me =
know if you have a suggestion to make description clearer in Section 1 =
and 2 to highlight this.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>I also assume that a) it takes time to provision class of service =
forwarding classes and b) the number of forwarding classes that can be =
provisioned are finite. What does the BGP listener do when the number of =
forwarding classes requested exceeds its capacity to =
deliver?&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>##svshah, Since =
scope of the document is to transport SLA content from the SLA Producer =
to the SLA Consumer, the document considers error handling in the =
context of transporting data and thus any formating errors and semantics =
errors within that context. Any errors in the context of processing QoS =
attribute content at the SLA Consumer is outside the scope of the =
document.</span><span =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p><p style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:8.5pt;font-family:Menlo;color:black'>&nbsp;</span><spa=
n =
style=3D'font-family:"Calibri","sans-serif";color:black'><o:p></o:p></spa=
n></p></div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:10.0pt;font-family:"Calibri","sans-serif";color:black'=
>&nbsp;</span><span =
style=3D'color:black'><o:p></o:p></span></p></div></div></div></div></div=
></div></div></div></body></html>
------=_NextPart_000_020D_01D2A170.2B5C15F0--



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From: Shitanshu Shah <shitanshu_shah@hotmail.com>
To: Ron Bonica <rbonica@juniper.net>, Susan Hares <shares@ndzh.com>, "EXT - luis.tomotaki@verizon.com" <luis.tomotaki@verizon.com>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-idr-sla-exchange.all@ietf.org" <draft-ietf-idr-sla-exchange.all@ietf.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/9ToA7Q5HLtaVbMGawei7hqI5ObE>
Subject: Re: [RTG-DIR] [Idr]  RtgDir review: draft-ietf-idr-sla-exchange-10
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Hi Ron,


Thank you for your time and discussion with Luis.


When SLA (now called TCA) consumer receives an advertisement, the consumer =
SHOULD install the route  without TCA specific advertised attribute in the =
case it can not process TCA attribute. We will make it explicit in the docu=
ment.


If you have suggestion on a specific section where it should go and/or if h=
ave a suggestion on a text, please suggest.


Regards,

Shitanshu


________________________________
From: Ron Bonica <rbonica@juniper.net>
Sent: Monday, March 20, 2017 7:29 AM
To: Susan Hares; EXT - luis.tomotaki@verizon.com; 'Shitanshu Shah'; rtg-dir=
@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Folks,

Luis and I spoke on Friday. The following is a summary of our conversation:

Draft-ietf-idr-sla-exchange proposes a mechanism through which a BGP speake=
r associates a forwarding policy with a prefix. When a BGP listener receive=
s an advertisement that is associated with a policy, it:


-          Instantiates the policy, if it does not already exist

-          Associates the prefix with the policy

BGP listeners can instantiate a finite number of policies (N).  SO, what ha=
ppens when a BGP listener has N policies instantiated and it receives an ad=
vertisement that would normally cause it to instantiate another policy? Opt=
ions are:


-          Tear down the session

-          Discard the advertisement

-          Install the route, but without the advertisement

-          Do something else?

We should probably be explicit about the required behavior.

                                                                     Ron


From: Ron Bonica
Sent: Sunday, March 12, 2017 12:11 PM
To: 'Susan Hares' <shares@ndzh.com>; EXT - luis.tomotaki@verizon.com <luis.=
tomotaki@verizon.com>; 'Shitanshu Shah' <shitanshu_shah@hotmail.com>; rtg-d=
ir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Luis,

This discussion might require a slightly higher bandwidth channel. Feel fre=
e to call me whenever you get a chance.

                                                                 Ron
                                                                  571 203 1=
704


From: Susan Hares [mailto:shares@ndzh.com]
Sent: Wednesday, March 8, 2017 10:23 AM
To: EXT - luis.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com> <luis=
.tomotaki@verizon.com<mailto:luis.tomotaki@verizon.com>>; 'Shitanshu Shah' =
<shitanshu_shah@hotmail.com<mailto:shitanshu_shah@hotmail.com>>; Ron Bonica=
 <rbonica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto=
:rtg-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-i=
etf-idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Luis:

Thank you for letting me know you desire for this feature.   Since Ron had =
additional questions, I=92ll let him start off this discussion.

Sue

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Tomotaki, Luis M
Sent: Tuesday, March 7, 2017 11:11 PM
To: Shitanshu Shah; Susan Hares; 'Ron Bonica'; rtg-dir@ietf.org<mailto:rtg-=
dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-i=
dr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Ron and Sue,
>From a service provider perspective, exchanging the SLA information between=
 the PE and CE would be very beneficial and could be widely used.  I think =
this is particular important in service provider=92s L3VPN networks where t=
he customers or service providers currently do not have full visibility to =
the QoS policy in the other end of the connection but still needs matching =
CE-PE SLA/QoS policies to achieve the correct two-way traffic prioritizatio=
n behavior during congestion.  In this example, once the SLA information ex=
change is standardized, my expectation is that the different CE/PE vendors =
would be able to automatically update in a vendor specific way, the SLA/QoS=
 policies based on the SLA information provided via BGP.

Luis

From: Shitanshu Shah [mailto:shitanshu_shah@hotmail.com]
Sent: Monday, March 6, 2017 9:31 AM
To: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; 'Ron Bonica' <rb=
onica@juniper.net<mailto:rbonica@juniper.net>>; rtg-dir@ietf.org<mailto:rtg=
-dir@ietf.org>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-=
idr-sla-exchange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10


Hi Sue,



Following is what I had responded to Ron. Hopefully that addresses/clarifie=
s.



To break it down in two point response,



1) This draft is not changing how SLA is established at first place. The dr=
aft is providing a method to convey this a priori established SLA to help r=
educe lot of manual complexities and errors to admin. Thus given a knowledg=
e of what SLA is established, in general devices should be capable to suppo=
rt that established SLA.





2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or of temporary nature =
where for example enough resources not available at any specific point of a=
 time.



We feel that in current state of the draft, it can be largely useful in dep=
loyments.







One can imagine though even establishment of SLA also can be done via excha=
nging it over bgp. However, negotiation of SLA does not have to be clubbed =
with exchange of SLA. Negotiation of SLA is not in this scope.


Regards,
Shitanshu

________________________________
From: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>
Sent: Saturday, March 4, 2017 8:31 AM
To: 'Ron Bonica'; 'Shitanshu Shah'; rtg-dir@ietf.org<mailto:rtg-dir@ietf.or=
g>; draft-ietf-idr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exch=
ange.all@ietf.org>; idr@ietf.org<mailto:idr@ietf.org>
Subject: RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Shitanshu:

Please address Ron=92s comment about widely deployed.  I believe this was p=
art of Alvaro=92s comments.

Sue

From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Ron Bonica
Sent: Thursday, February 23, 2017 12:07 PM
To: Shitanshu Shah; rtg-dir@ietf.org<mailto:rtg-dir@ietf.org>; draft-ietf-i=
dr-sla-exchange.all@ietf.org<mailto:draft-ietf-idr-sla-exchange.all@ietf.or=
g>; idr@ietf.org<mailto:idr@ietf.org>
Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10

Hello,

The draft is internally consistent. But given what is left out of scope, I =
wonder if the new attributes will ever be widely deployed.

                                                                           =
     Ron



This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.


##svshah, though this is one desired use of exchanging SLA content, the dra=
ft focuses on transporting SLA content from the SLA Producer to the SLA Con=
sumer. Processing of the QoS attribute content, at the SLA Consumer, is out=
side the scope of this document.



##svshah, Let me know if you have a suggestion to make description clearer =
in Section 1 and 2 to highlight this.


I also assume that a) it takes time to provision class of service forwardin=
g classes and b) the number of forwarding classes that can be provisioned a=
re finite. What does the BGP listener do when the number of forwarding clas=
ses requested exceeds its capacity to deliver?


##svshah, Since scope of the document is to transport SLA content from the =
SLA Producer to the SLA Consumer, the document considers error handling in =
the context of transporting data and thus any formating errors and semantic=
s errors within that context. Any errors in the context of processing QoS a=
ttribute content at the SLA Consumer is outside the scope of the document.





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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
<style type=3D"text/css" style=3D"display:none;"><!-- P {margin-top:0;margi=
n-bottom:0;} --></style>
</head>
<body dir=3D"ltr">
<div id=3D"divtagdefaultwrapper" style=3D"font-size:12pt;color:#000000;font=
-family:Calibri,Arial,Helvetica,sans-serif;" dir=3D"ltr">
<p>Hi Ron,</p>
<p><br>
</p>
<p>Thank you for your time and discussion with Luis.</p>
<p><br>
</p>
<p>When SLA (now called&nbsp;TCA) consumer receives an advertisement, the c=
onsumer SHOULD install the route&nbsp;&nbsp;without TCA specific advertised=
 attribute in the&nbsp;case it can not process TCA attribute. We will make =
it explicit in the document.</p>
<p><br>
</p>
<p>If you have suggestion on a specific section where it should go and/or i=
f have a suggestion on a text, please suggest.</p>
<p><br>
</p>
<p>Regards,</p>
<p>Shitanshu</p>
<br>
<br>
<div style=3D"color: rgb(0, 0, 0);">
<hr tabindex=3D"-1" style=3D"display:inline-block; width:98%">
<div id=3D"divRplyFwdMsg" dir=3D"ltr"><font face=3D"Calibri, sans-serif" co=
lor=3D"#000000" style=3D"font-size:11pt"><b>From:</b> Ron Bonica &lt;rbonic=
a@juniper.net&gt;<br>
<b>Sent:</b> Monday, March 20, 2017 7:29 AM<br>
<b>To:</b> Susan Hares; EXT - luis.tomotaki@verizon.com; 'Shitanshu Shah'; =
rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.org; idr@ietf.org<br=
>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10</font>
<div>&nbsp;</div>
</div>
<div>
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Folks,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Luis and I spoke on Friday. The fol=
lowing is a summary of our conversation:</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Draft-ietf-idr-sla-exchange propose=
s a mechanism through which a BGP speaker associates a forwarding policy wi=
th a prefix.
<a name=3D"_MailEndCompose">When a BGP listener receives an advertisement t=
hat is associated with a policy, it:</a></span></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D""=
><span style=3D"font-size:11.0pt; font-family:&quot;Calibri&quot;,sans-seri=
f; color:#1F497D"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><span style=3D"font-size:11.0pt; font-family:&quot;Cal=
ibri&quot;,sans-serif; color:#1F497D">Instantiates the policy, if it does n=
ot already exist</span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D""=
><span style=3D"font-size:11.0pt; font-family:&quot;Calibri&quot;,sans-seri=
f; color:#1F497D"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><span style=3D"font-size:11.0pt; font-family:&quot;Cal=
ibri&quot;,sans-serif; color:#1F497D">Associates the prefix with the policy=
</span></span></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">BGP listeners can =
instantiate a finite number of policies (N). &nbsp;SO, what happens when a =
BGP listener has N policies instantiated and it receives
 an advertisement that would normally cause it to instantiate another polic=
y? Options are:</span></span></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D""=
><span style=3D"font-size:11.0pt; font-family:&quot;Calibri&quot;,sans-seri=
f; color:#1F497D"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><span style=3D"font-size:11.0pt; font-family:&quot;Cal=
ibri&quot;,sans-serif; color:#1F497D">Tear down the session</span></span></=
p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D""=
><span style=3D"font-size:11.0pt; font-family:&quot;Calibri&quot;,sans-seri=
f; color:#1F497D"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><span style=3D"font-size:11.0pt; font-family:&quot;Cal=
ibri&quot;,sans-serif; color:#1F497D">Discard the advertisement</span></spa=
n></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D""=
><span style=3D"font-size:11.0pt; font-family:&quot;Calibri&quot;,sans-seri=
f; color:#1F497D"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><span style=3D"font-size:11.0pt; font-family:&quot;Cal=
ibri&quot;,sans-serif; color:#1F497D">Install the route, but without the ad=
vertisement</span></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in"><span style=3D""=
><span style=3D"font-size:11.0pt; font-family:&quot;Calibri&quot;,sans-seri=
f; color:#1F497D"><span style=3D"">-<span style=3D"font:7.0pt &quot;Times N=
ew Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><span style=3D"font-size:11.0pt; font-family:&quot;Cal=
ibri&quot;,sans-serif; color:#1F497D">Do something else?</span></span></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">We should probably=
 be explicit about the required behavior.</span></span></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp; Ron</span></span></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D""><span style=3D"font-size:11.0pt; fo=
nt-family:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></spa=
n></p>
<span style=3D""></span>
<div style=3D"border:none; border-left:solid blue 1.5pt; padding:0in 0in 0i=
n 4.0pt">
<div>
<div style=3D"border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt; font-family:&quo=
t;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt=
; font-family:&quot;Calibri&quot;,sans-serif"> Ron Bonica
<br>
<b>Sent:</b> Sunday, March 12, 2017 12:11 PM<br>
<b>To:</b> 'Susan Hares' &lt;shares@ndzh.com&gt;; EXT - luis.tomotaki@veriz=
on.com &lt;luis.tomotaki@verizon.com&gt;; 'Shitanshu Shah' &lt;shitanshu_sh=
ah@hotmail.com&gt;; rtg-dir@ietf.org; draft-ietf-idr-sla-exchange.all@ietf.=
org; idr@ietf.org<br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Luis,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">This discussion might require a sli=
ghtly higher bandwidth channel. Feel free to call me whenever you get a cha=
nce.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;571 203 1704</span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<div style=3D"border:none; border-left:solid blue 1.5pt; padding:0in 0in 0i=
n 4.0pt">
<div>
<div style=3D"border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt; font-family:&quo=
t;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt=
; font-family:&quot;Calibri&quot;,sans-serif"> Susan Hares [<a href=3D"mail=
to:shares@ndzh.com">mailto:shares@ndzh.com</a>]
<br>
<b>Sent:</b> Wednesday, March 8, 2017 10:23 AM<br>
<b>To:</b> EXT - <a href=3D"mailto:luis.tomotaki@verizon.com">luis.tomotaki=
@verizon.com</a> &lt;<a href=3D"mailto:luis.tomotaki@verizon.com">luis.tomo=
taki@verizon.com</a>&gt;; 'Shitanshu Shah' &lt;<a href=3D"mailto:shitanshu_=
shah@hotmail.com">shitanshu_shah@hotmail.com</a>&gt;;
 Ron Bonica &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica@juniper.net<=
/a>&gt;; <a href=3D"mailto:rtg-dir@ietf.org">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> RE: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Luis:
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Thank you for letting me know you d=
esire for this feature.&nbsp; &nbsp;Since Ron had additional questions, I=
=92ll let him start off this discussion.
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Sue
</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<div>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt; font-family:&quo=
t;Tahoma&quot;,sans-serif">From:</span></b><span style=3D"font-size:10.0pt;=
 font-family:&quot;Tahoma&quot;,sans-serif"> Idr [<a href=3D"mailto:idr-bou=
nces@ietf.org">mailto:idr-bounces@ietf.org</a>]
<b>On Behalf Of </b>Tomotaki, Luis M<br>
<b>Sent:</b> Tuesday, March 7, 2017 11:11 PM<br>
<b>To:</b> Shitanshu Shah; Susan Hares; 'Ron Bonica'; <a href=3D"mailto:rtg=
-dir@ietf.org">
rtg-dir@ietf.org</a>; <a href=3D"mailto:draft-ietf-idr-sla-exchange.all@iet=
f.org">draft-ietf-idr-sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [Idr] [RTG-DIR] RtgDir review: draft-ietf-idr-sla-excha=
nge-10</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Ron and Sue,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">From a service provider perspective=
, exchanging the SLA information between the PE and CE would be very benefi=
cial and could be widely used.&nbsp; I think this is
 particular important in service provider=92s L3VPN networks where the cust=
omers or service providers currently do not have full visibility to the QoS=
 policy in the other end of the connection but still needs matching CE-PE S=
LA/QoS policies to achieve the correct
 two-way traffic prioritization behavior during congestion.&nbsp; In this e=
xample, once the SLA information exchange is standardized, my expectation i=
s that the different CE/PE vendors would be able to automatically update in=
 a vendor specific way, the SLA/QoS policies
 based on the SLA information provided via BGP.&nbsp; </span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">Luis</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt; font-family:&quot;C=
alibri&quot;,sans-serif; color:#1F497D">&nbsp;</span></p>
<div>
<div style=3D"border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt; font-family:&quo=
t;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt=
; font-family:&quot;Calibri&quot;,sans-serif"> Shitanshu Shah [<a href=3D"m=
ailto:shitanshu_shah@hotmail.com">mailto:shitanshu_shah@hotmail.com</a>]
<br>
<b>Sent:</b> Monday, March 6, 2017 9:31 AM<br>
<b>To:</b> Susan Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.c=
om</a>&gt;; 'Ron Bonica' &lt;<a href=3D"mailto:rbonica@juniper.net">rbonica=
@juniper.net</a>&gt;;
<a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a>; <a href=3D"mailto=
:draft-ietf-idr-sla-exchange.all@ietf.org">
draft-ietf-idr-sla-exchange.all@ietf.org</a>; <a href=3D"mailto:idr@ietf.or=
g">idr@ietf.org</a><br>
<b>Subject:</b> [E] Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchang=
e-10</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<div id=3D"divtagdefaultwrapper">
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
Hi Sue,</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
Following is what I had responded to Ron. Hopefully&nbsp;that addresses/cla=
rifies.</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
To break it down in two point response,</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
1) This draft is not changing how SLA is established at first place. The dr=
aft&nbsp;is providing a method to convey this a priori established&nbsp;SLA=
 to help reduce lot of manual complexities and errors
 to admin. Thus given a knowledge of what SLA is established, in general de=
vices should be capable to support that established&nbsp;SLA.</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
2) If there still are any issues in implementing exchanged SLA in forwardin=
g, we think they either are implementation specific or&nbsp;of temporary na=
ture where for example enough resources not available
 at any specific point of a time.</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
We feel that in current state of the draft, it can be largely useful in dep=
loyments.</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
One can imagine though even establishment of SLA also can&nbsp;be done via =
exchanging it over bgp. However, negotiation of SLA does not have to be clu=
bbed with exchange of SLA. Negotiation of SLA is
 not in this scope.</span></p>
<p><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">=
&nbsp;</span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif; color:black">Regards,</span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif; color:black">Shitanshu</span></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-f=
amily:&quot;Calibri&quot;,sans-serif; color:black">&nbsp;</span></p>
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black">
<hr size=3D"2" width=3D"98%" align=3D"center">
</span></div>
<div id=3D"divRplyFwdMsg">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt; font-family:&quo=
t;Calibri&quot;,sans-serif; color:black">From:</span></b><span style=3D"fon=
t-size:11.0pt; font-family:&quot;Calibri&quot;,sans-serif; color:black"> Su=
san Hares &lt;<a href=3D"mailto:shares@ndzh.com">shares@ndzh.com</a>&gt;<br=
>
<b>Sent:</b> Saturday, March 4, 2017 8:31 AM<br>
<b>To:</b> 'Ron Bonica'; 'Shitanshu Shah'; <a href=3D"mailto:rtg-dir@ietf.o=
rg">rtg-dir@ietf.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> RE: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"font-family:&quot;Calibri&quot;,sans-serif; color:bla=
ck">
</span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&quot;,sans-=
serif; color:black">&nbsp;</span></p>
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:11.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">Shitanshu:
</span><span style=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:11.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span><span style=
=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:11.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">Please address Ron=92s c=
omment about widely deployed.&nbsp; I believe this was part of Alvaro=92s c=
omments.
</span><span style=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:11.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span><span style=
=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:11.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">Sue
</span><span style=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:11.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span><span style=
=3D"color:black"></span></p>
<div>
<div style=3D"border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0i=
n 0in 0in">
<p class=3D"MsoNormal" style=3D""><b><span style=3D"font-size:10.0pt; font-=
family:&quot;Tahoma&quot;,sans-serif; color:black">From:</span></b><span st=
yle=3D"font-size:10.0pt; font-family:&quot;Tahoma&quot;,sans-serif; color:b=
lack"> rtg-dir [<a href=3D"mailto:rtg-dir-bounces@ietf.org">mailto:rtg-dir-=
bounces@ietf.org</a>]
<b>On Behalf Of </b>Ron Bonica<br>
<b>Sent:</b> Thursday, February 23, 2017 12:07 PM<br>
<b>To:</b> Shitanshu Shah; <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf=
.org</a>;
<a href=3D"mailto:draft-ietf-idr-sla-exchange.all@ietf.org">draft-ietf-idr-=
sla-exchange.all@ietf.org</a>;
<a href=3D"mailto:idr@ietf.org">idr@ietf.org</a><br>
<b>Subject:</b> Re: [RTG-DIR] RtgDir review: draft-ietf-idr-sla-exchange-10=
</span><span style=3D"color:black"></span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D""><span style=3D"color:black">&nbsp;</span>=
</p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">Hello,</span><span style=
=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span><span style=
=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">The draft is internally =
consistent. But given what is left out of scope, I wonder if the new attrib=
utes will ever be widely deployed.</span><span style=3D"color:black"></span=
></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span><span style=
=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
 Ron</span><span style=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span><span style=
=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:#1F497D">&nbsp;</span><span style=
=3D"color:black"></span></p>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black"><br>
This document might benefit from discussion of operational issues. I assume=
 that when a BGP listener learns a route with the SLA Exchange Attribute, i=
t provisions class of service forwarding classes on interfaces.</span><span=
 style=3D"color:black"></span></p>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black">&nbsp;</span><span style=
=3D"color:black"></span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt; font-family:Menlo; color:black">##svshah=
, though this is one desired use of exchanging SLA content, the draft focus=
es on transporting SLA content from the SLA Producer to the SLA Consumer. P=
rocessing of the QoS attribute content,
 at the SLA Consumer, is outside the scope of this document.</span><span st=
yle=3D"font-family:&quot;Calibri&quot;,sans-serif; color:black"></span></p>
<p style=3D"min-height:13px"><span style=3D"font-size:8.5pt; font-family:Me=
nlo; color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibri&quo=
t;,sans-serif; color:black"></span></p>
<p><span style=3D"font-size:8.5pt; font-family:Menlo; color:black">##svshah=
, Let me know if you have a suggestion to make description clearer in Secti=
on 1 and 2 to highlight this.</span><span style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif; color:black"></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black">&nbsp;</span><span style=
=3D"color:black"></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black">&nbsp;</span><span style=
=3D"color:black"></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black">I also assume that a) it t=
akes time to provision class of service forwarding classes and b) the numbe=
r of forwarding classes that can be provisioned
 are finite. What does the BGP listener do when the number of forwarding cl=
asses requested exceeds its capacity to deliver?&nbsp;</span><span style=3D=
"color:black"></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black">&nbsp;</span><span style=
=3D"color:black"></span></p>
</div>
<div>
<p><span style=3D"font-size:8.5pt; font-family:Menlo; color:black">##svshah=
, Since scope of the document is to transport SLA content from the SLA Prod=
ucer to the SLA Consumer, the document considers error handling in the cont=
ext of transporting data and thus
 any formating errors and semantics errors within that context. Any errors =
in the context of processing QoS attribute content at the SLA Consumer is o=
utside the scope of the document.</span><span style=3D"font-family:&quot;Ca=
libri&quot;,sans-serif; color:black"></span></p>
<p style=3D"margin-bottom:12.0pt"><span style=3D"font-size:8.5pt; font-fami=
ly:Menlo; color:black">&nbsp;</span><span style=3D"font-family:&quot;Calibr=
i&quot;,sans-serif; color:black"></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black">&nbsp;</span><span style=
=3D"color:black"></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D""><span style=3D"font-size:10.0pt; font-fam=
ily:&quot;Calibri&quot;,sans-serif; color:black">&nbsp;</span><span style=
=3D"color:black"></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>

--_000_DM3PR13MB06045C76EE74B0C6AA5EA941E53C0DM3PR13MB0604namp_--


From nobody Thu Mar 23 12:20:42 2017
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Subject: [RTG-DIR] Review of draft-ietf-trill-p2mp-bfd-04
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Reviewer: Carlos Pignataro
Review result: Has Nits

Hi,

This is a short yet well written document. Looks really good. Just a
couple of small questions/comments:

1. It's not clear exactly what from RFC 7175 is being updated by
Section 4. This is based on the last paragraph of the Intro, yet
Section 5 also seems relevant to that update.
2. In the IANA COnsiderations, it would be useful to explicitly list
that the "RBridge Channel Protocols" registry is part of the
"Transparent Interconnection of Lots of Links (TRILL) Parameters" 

Thanks,

Carlos Pignataro.


From nobody Thu Mar 23 12:24:25 2017
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Carlos:=20

Thank you for the quick review.=20

Sue=20

-----Original Message-----
From: rtg-dir [mailto:rtg-dir-bounces@ietf.org] On Behalf Of Carlos =
Pignataro
Sent: Thursday, March 23, 2017 3:20 PM
To: rtg-dir@ietf.org
Cc: draft-ietf-trill-p2mp-bfd.all@ietf.org; ietf@ietf.org; =
trill@ietf.org
Subject: [RTG-DIR] Review of draft-ietf-trill-p2mp-bfd-04

Reviewer: Carlos Pignataro
Review result: Has Nits

Hi,

This is a short yet well written document. Looks really good. Just a =
couple of small questions/comments:

1. It's not clear exactly what from RFC 7175 is being updated by Section =
4. This is based on the last paragraph of the Intro, yet Section 5 also =
seems relevant to that update.
2. In the IANA COnsiderations, it would be useful to explicitly list =
that the "RBridge Channel Protocols" registry is part of the =
"Transparent Interconnection of Lots of Links (TRILL) Parameters"=20

Thanks,

Carlos Pignataro.



From nobody Thu Mar 23 15:37:31 2017
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Hi Carlos,

1. Yes. Section 5 rather than Seciton 4 is relevant. The last paragraph of =
the Intro will be updated to reflect this.

2. OK. The text will be updated.

Thanks,
Mingui
________________________________________
From: Carlos Pignataro [cpignata@cisco.com]
Sent: Friday, March 24, 2017 3:20
To: rtg-dir@ietf.org
Cc: draft-ietf-trill-p2mp-bfd.all@ietf.org; ietf@ietf.org; trill@ietf.org
Subject: Review of draft-ietf-trill-p2mp-bfd-04

Reviewer: Carlos Pignataro
Review result: Has Nits

Hi,

This is a short yet well written document. Looks really good. Just a
couple of small questions/comments:

1. It's not clear exactly what from RFC 7175 is being updated by
Section 4. This is based on the last paragraph of the Intro, yet
Section 5 also seems relevant to that update.
2. In the IANA COnsiderations, it would be useful to explicitly list
that the "RBridge Channel Protocols" registry is part of the
"Transparent Interconnection of Lots of Links (TRILL) Parameters"

Thanks,

Carlos Pignataro.=


From nobody Fri Mar 24 19:35:43 2017
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Subject: Re: [RTG-DIR] QA review of draft-ietf-mpls-flow-ident-02
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Hi,

The new draft looks good. It will help to work with the RFC-editor team to
rewrite some parts of the draft to make it clearer.

Thanks, Manav

On Sat, Feb 25, 2017 at 1:38 AM, Stewart Bryant <stewart.bryant@gmail.com>
wrote:

> Manav
>
> Thank you for your review comments.
>
> I have uploaded version 4.
>
> On 01/02/2017 17:12, Manav Bhatia wrote:
>
> Dear Authors,
>
>
> I have been asked to do Routing Area Directorate QA review
> of draft-ietf-mpls-flow-ident-02
>
>
> Summary:
>
>
> Its an informational draft that discusses =E2=80=9Cdesired capabilities f=
or MPLS
> flow identification=E2=80=9D. I am not sure what this means =E2=80=94 is =
this alluding to
> the capabilities on the routers, or some protocol? I think the authors
> meant to discuss the aspects that must be considered when developing a
> solution for MPLS flow identification. However, it takes quite a bit of
> reading to get there.
>
>
> I used your words
>
>
> I found the document quite hard to parse initially. After a couple of
> passes, it became somewhat better and I could understand the points that
> the authors were trying to make. I have no concerns on the technical
> content.
>
>
> Major Comments:
>
>
> Please work on the readability aspects of the draft.
>
>
> I am obviously not the right person to do that. I just re-read it after a
> long time, and I could understand it. I am not entirely sure how to addre=
ss
> your comment, without further details. Maybe this is a discussion to have
> with Deborah when she sees the draft?
>
>
> Minor Comments:
>
>
> 1. Section  3 - I would resist the urge to make a sweeping statement that
> packets dont get dropped in =E2=80=9Cmodern networks=E2=80=9D unless the =
network is
> oversubscribed. I work for a large vendor and I see packets dropping all
> the time.
>
>
> This now says
> *: *
> Modern networks, if not oversubscribed, potentially drop relatively few
> packets, thus packet loss measurement is highly sensitive to the
> common demarcation of the exact set of packets to be measured for loss.
>
>
> 2. Section 3 - What is a counter error?
>
>
> See above
>
>
> 3. Section 3 - =E2=80=9CThus where accuracy better than the data link los=
s
> performance of a modern optical network is required, it may be economical=
ly
> advantageous ..=E2=80=9D. I had a very hard time trying to parse this.
>
>
> This now says:
>
> Thus where accurate measurement of packet loss is required,
> it may be economically advantageous, or even a technical requirement, to
> include some form of marking in the packets to assign each packet to
> a particular counter for loss measurement purposes.
>
> To fully understand the text the reader should look at the reference.
>
>
> 4. Section 4 - =E2=80=9CAlso, for injected test packets, these may not be
> co-routed with the data traffic due to ECMP=E2=80=9D. Also include LAG an=
d MC-LAG.
> Additionally the data path for the test traffic could be different from t=
he
> regular IP traffic.
>
> This now says:
>
> Also, for injected test packets, these may not be co-routed
> with the data traffic due to ECMP, or various link aggregation technologi=
es
> all of which distribute flows across a number of paths at the
> network, or data-link and hence at the physical layer.
>
>
> 5. Section 5 - =E2=80=9CSuch fine grained resolution may be possible by d=
eep
> packet inspection, .. =E2=80=9C. How can you do deep packet inspection at=
 the LSR.
>
> How will you know the label stack size in the packet?
>
>
> Er, we get past the label stack all the time to do 5 tuple load balancing
> which is the standard method of at least one major vendor.
>
> The S bit is set at BoS!
>
> I am not sure if the LSR needs to deep inspect these packets?
>
>
> So how else do you identify a flow? Of course your view of "deep" may
> vary, but inspecting to the depth of the transport layer port number is
> standard.
>
> But based on text in Sec 8, LSRs appear to be processing these packets.
>
>
> I am not sure I understand the point here.
>
> - Stewart
>
>
> Cheers, Manav
>
>
>

--94eb2c1847481bd028054b84f77b
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr">Hi,<div><br></div><div>The new draft looks good. It will h=
elp to work with the RFC-editor team to rewrite some parts of the draft to =
make it clearer.</div><div><br></div><div>Thanks, Manav</div></div><div cla=
ss=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sat, Feb 25, 2017 at 1=
:38 AM, Stewart Bryant <span dir=3D"ltr">&lt;<a href=3D"mailto:stewart.brya=
nt@gmail.com" target=3D"_blank">stewart.bryant@gmail.com</a>&gt;</span> wro=
te:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex">
 =20
   =20
 =20
  <div bgcolor=3D"#FFFFFF" text=3D"#000000">
    <p>Manav</p>
    <p>Thank you for your review comments.</p>
    <p>I have uploaded version 4.<br>
    </p><span class=3D"">
    <br>
    <div class=3D"m_1011783714488888362moz-cite-prefix">On 01/02/2017 17:12=
, Manav Bhatia
      wrote:<br>
    </div>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>Dear Authors,</span></p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>I have been asked to do
            Routing Area Directorate QA review
            of=C2=A0draft-ietf-mpls-flow-ident-<wbr>02</span></p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>Summary:</span></p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>Its an informational
            draft that discusses =E2=80=9Cdesired capabilities for MPLS flo=
w
            identification=E2=80=9D. I am not sure what this means =E2=80=
=94 is this
            alluding to the capabilities on the routers, or some
            protocol? I think the authors meant to discuss the aspects
            that must be considered when developing a solution for MPLS
            flow identification. However, it takes quite a bit of
            reading to get there. <br>
          </span></p>
      </div>
    </blockquote>
    <br></span>
    I used your words<span class=3D""><br>
    <br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>I found the document
            quite hard to parse initially. After a couple of passes, it
            became somewhat better and I could understand the points
            that the authors were trying to make. I have no concerns on
            the technical content.</span></p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>Major Comments:</span></p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>Please work on the
            readability aspects of the draft.</span></p>
      </div>
    </blockquote>
    <br></span>
    I am obviously not the right person to do that. I just re-read it
    after a long time, and I could understand it. I am not entirely sure
    how to address your comment, without further details. Maybe this is
    a discussion to have with Deborah when she sees the draft?<span class=
=3D""><br>
    <br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>Minor Comments:</span></p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>1. Section=C2=A0 3 - I would
            resist the urge to make a sweeping statement that packets
            dont get dropped in =E2=80=9Cmodern networks=E2=80=9D unless th=
e network is
            oversubscribed. I work for a large vendor and I see packets
            dropping all the time.</span></p>
      </div>
    </blockquote>
    <br></span>
    This now says<span style=3D"color:rgb(0,102,33);font-family:arial,sans-=
serif;font-size:14px;font-style:normal;font-variant-ligatures:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:left=
;text-indent:0px;text-transform:none;white-space:nowrap;word-spacing:0px;ba=
ckground-color:rgb(255,255,255);display:inline!important;float:none"><b>:<b=
r>
      </b></span><span style=3D"color:rgb(0,102,33);font-family:arial,sans-=
serif;font-size:14px;font-style:normal;font-variant-ligatures:normal;font-v=
ariant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:left=
;text-indent:0px;text-transform:none;white-space:nowrap;word-spacing:0px;ba=
ckground-color:rgb(255,255,255);display:inline!important;float:none"></span=
><br>
    Modern networks, if not oversubscribed, potentially drop relatively
    few<br>
    packets, thus packet loss measurement is highly sensitive to the <br>
    common demarcation of the exact set of packets to be measured for
    loss.<span class=3D""><br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>2. Section 3 - What is a
            counter error?</span></p>
      </div>
    </blockquote>
    <br></span>
    See above<span class=3D""><br>
    <br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>3. Section 3 - =E2=80=9CThus
            where accuracy better than the data link loss performance of
            a modern optical network is required, it may be economically
            advantageous ..=E2=80=9D. I had a very hard time trying to pars=
e
            this.</span></p>
      </div>
    </blockquote>
    <br></span>
    This now says:<br>
    <br>
    Thus where accurate measurement of packet loss is required, <br>
    it may be economically advantageous, or even a technical
    requirement, to<br>
    include some form of marking in the packets to assign each packet to<br=
>
    a particular counter for loss measurement purposes.<br>
    <br>
    To fully understand the text the reader should look at the
    reference.<span class=3D""><br>
    <br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>4. Section 4 - =E2=80=9CAlso,
            for injected test packets, these may not be co-routed with
            the data traffic due to ECMP=E2=80=9D. Also include LAG and MC-=
LAG.
            Additionally the data path for the test traffic could be
            different from the regular IP traffic.</span></p>
      </div>
    </blockquote></span><span class=3D"">
    This now says:<br>
    <br>
    Also, for injected test packets, these may not be co-routed<br></span>
    with the data traffic due to ECMP, or various link aggregation
    technologies<br>
    all of which distribute flows across a number of paths at the <br>
    network, or data-link and hence at the physical layer. <br><span class=
=3D"">
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>5. Section 5 - =E2=80=9CSuch
            fine grained resolution may be possible by deep packet
            inspection, .. =E2=80=9C. How can you do deep packet inspection=
 at
            the LSR. </span></p>
      </div>
    </blockquote>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>How will you know the
            label stack size in the packet? </span></p>
      </div>
    </blockquote>
    <br></span>
    Er, we get past the label stack all the time to do 5 tuple load
    balancing which is the standard method of at least one major vendor.<br=
>
    <br>
    The S bit is set at BoS!<span class=3D""><br>
    <br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>I am not sure if the LSR
            needs to deep inspect these packets? </span></p>
      </div>
    </blockquote>
    <br></span>
    So how else do you identify a flow? Of course your view of &quot;deep&q=
uot;
    may vary, but inspecting to the depth of the transport layer port
    number is standard.<span class=3D""><br>
    <br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>But based on text in Sec
            8, LSRs appear to be processing these packets.</span></p>
      </div>
    </blockquote>
    <br></span>
    I am not sure I understand the point here.<br>
    <br>
    - Stewart<br>
    <br>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35);min-height:15px"><span></span><br>
        </p>
        <p style=3D"margin:0px;font-size:13px;line-height:normal;font-famil=
y:arial;color:rgb(35,35,35)"><span>Cheers, Manav</span></p>
      </div>
    </blockquote>
    <br>
  </div>

</blockquote></div><br></div>

--94eb2c1847481bd028054b84f77b--


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Subject: Re: [RTG-DIR] RtgDir review: draft-ietf-mpls-tp-shared-ring-protection-04.txt
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Hi Mach,

Thanks a lot for your comments. An updated version of =
draft-ietf-mpls-tp-shared-ring-protection which solves your comments =
will be submitted when the submission is open again.=20

And please see some replies inline:

> -----Original Message-----
> From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Mach Chen
> Sent: Monday, February 27, 2017 6:05 PM
> To: 'rtg-ads@ietf.org' <rtg-ads@ietf.org>
> Cc: 'rtg-dir@ietf.org' <rtg-dir@ietf.org>;=20
> 'draft-ietf-mpls-tp-shared-ring-protection@ietf.org'
> <draft-ietf-mpls-tp-shared-ring-protection@ietf.org>; mpls@ietf.org
> Subject: [mpls] RtgDir review:=20
> draft-ietf-mpls-tp-shared-ring-protection-04.txt
>=20
> Hello,
>=20
> I have been selected as the Routing Directorate reviewer for this=20
> draft. The Routing Directorate seeks to review all routing or=20
> routing-related drafts as they pass through IETF last call and IESG =
review, and sometimes on special request.
> The purpose of the review is to provide assistance to the Routing ADs. =

> For more information about the Routing Directorate, please see=20
> http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
>=20
> Although these comments are primarily for the use of the Routing ADs,=20
> it would be helpful if you could consider them along with any other=20
> IETF Last Call comments that you receive, and strive to resolve them=20
> through discussion or by updating the draft.
>=20
> Document: draft-ietf-mpls-tp-shared-ring-protection-04.txt
>  Reviewer: Mach Chen
>  Review Date: 2017/2/23
>  IETF LC End Date:
>  Intended Status: Standards Track
>=20
> Summary:
> I have some minor concerns about this document that I think should be=20
> resolved before publication.
>=20
> Comments:
> This document may need some paragraph restructuration or adjustment to =

> make it more readable, for example , before jumping into the detail of =

> some processes, it's better to give some introduction to the scenarios =

> and relevant conditions, and the used terms need to be defined before =
being used.
>=20
> Major Issues:
> No major issues found.
>=20
> Minor Issues:
>=20
> 1.
> The implicit fundamental pre-condition of the proposed MSRP is that,=20
> for each protected LSP, the egress and the  ingress LSR have to=20
> negotiate (or through NMS, or static configurations) the LSP label =
that will be pushed by the ingress.
> The label has to be a label that the egress must know how to handle=20
> it, otherwise, when the packet exits the ring tunnel, the packet will=20
> be mis-forwarded to non-intended node or dropped. This condition and=20
> probably the relevant mechanisms  should be explicitly pointed out and =

> described in the document.

[Authors] Some description about LSP label allocation will be added in =
the new version.

>=20
> 2.
> Section 4.1
> The Figure of "the logical layers of the ring" shows the innermost=20
> service is PW, is this document only applies to PW or other=20
> applications will be included. If it's later, some modifications are=20
> needed, and you need to check the whole document to make the relevant =
descriptions and usages consistent.
> Figure 2 has the same problem.

[Authors] Yes, other services can also be supported. In the latest =
version =E2=80=9CPW=E2=80=9D is replaced by "service".

>=20
> 3.
> Section 4.1.3
> s/The clockwise working ring tunnel label RcW_D/ The clockwise working =

> ring tunnel label of RcW_D And since RcW_D identifies a ring tunnel,=20
> not a label, and the author seems intend to use RcW_D(X) to identify a =

> ring tunnel label, I'd suggest to add some clarification text to this =
notation.

[Authors] The sentence will be rephrased to make it clearer.=20

> 4.
> Section 4.4.1
> Suggest to move Figure 11 to under "Bullet  1.  Single-node=20
> interconnected rings."

[Authors]  Done.=20

>=20
> 5.
> Section 4.4.4, the penultimate paragraph=20
> "...LSP1->R1cW_F&A(D)->R1aP_F&A(D->C->B->A)->R2cW_I(A->F->G->H->I)->LS
> P1.", what's reason to add "R1cW_F&A(D)" into the switching path?=20
> Seems it's redundant.

[Authors]  Agree, the redundant part will be removed.=20

> 6.
> Section 4.4.3,
> In my understanding, the ring tunnels to virtual interconnected group=20
> are shared by all LSPs that needed to be forwarded to other rings,=20
> right? If so, it's better to add some text to explicitly state this.

[Authors] Yes, some description will be added to reflect this.=20

> 7.
> Section 5.1
> "   When the failure has cleared and the Wait-to-Restore (WTR) timer =
has
>    expired, the nodes sourcing RPS requests MUST drop their respective
>    switches (tail end) and MUST source an RPS request carrying the NR
>    code.  The node receiving from both directions such an RPS request
>    (head end) MUST drop its protection switches."
>=20
> Above text introduces the "tail end" and "Head end" tems, but the=20
> document does not have detail definition and introduction to these=20
> terms. Suggest to give the definition of these term in the terminology =
and notation section.

[Authors]  The "tail end" and "head end" will be replaced with detailed =
description.

> 8.
> Section 5.1
> "A destination node is a node that is adjacent to a node that
>    identified a failed link."
>=20
> Based on the above text, the "destination node" cannot be uniquely=20
> determined, since a node in a ring has two adjacent nodes. Some=20
> clarification or more accurate description is needed.

[Authors] The sentence has been rephrased to make it clear.

> 9.
> Section 5.1.2
> s/sane ring/same ring

Done.

> 10.
> Section 5.1.3.  Ring Node RPS States
>=20
> Are those RPS states per node or per ring tunnel or per egress? =20
> Whatever for either case, the document should state it explicitly.
>=20
> And according to the explanation of each state, seems that the states=20
> are mutex each other. Considering the steering mode, seems that a node =

> may be at both switching and pass-through state, right?
>=20
> BTW, for those RPS codes, it's better to add a reference to the=20
> section (Section
> 5.2.1.1) to give a hint to the reader that there will be detailed=20
> explanation in the following sections.

[Authors]
As indicated by the title of 5.1.3, the RPS state is per node.=20

In steering mode, a node can be in either switching or pass-through =
state, but cannot be both.=20

> 11.
> Section 5.1.3.2
>=20
> "A node in the switching state MUST terminate RPS requests flow in
>    both directions."
>=20
> If a node in the switching state terminates RPS requests, how does the =

> steering switching mode work?

[Authors] In steering mode, upon receiving the RPS request, ring nodes =
which are not the destination node would enter the pass-through state, =
and the RPS request is relayed along the ring to the next node until it =
reaches the destination node of the RPS request.

> 12.
> Section 5.1.  RPS Protocol
> "The described RPS protocol uses the short-
>    wrapping mechanism described in section 4.3.2 as an example."
> Are there any differences when the RPS protocol used for wrapping and=20
> steering, if no, it should be stated clearly. Otherwise, it needs to=20
> specify the differences, or for each switching mode, define its=20
> procedures and state machine.

[Authors]  A sentence will be added to this section: "The RPS protocol =
is applicable to all the three protection modes."

>=20
> 13.
> Section 5.1.3.2.  Switching State,
>=20
> The third paragraph describes the rules in case of unidirectional=20
> failure, but reader can not recognized this only when read the next=20
> paragraph. This section needs some restructure to make it more=20
> readable. BTW, since there are differences between unidirectional=20
> failure and bidirectional failure, there need some text to describe=20
> the rules and procedures for the bidirectional case IMHO

[Authors] This section has been restructured to describe the procedures =
of bidirectional failure and unidirectional failure.

> 14.
> Section 5.2.2.  Initial States
> a)
> It just lists a table and let the reader to guess the meaning, it's=20
> better to add some clarification text to help the reader understand=20
> the meaning and intention.
>=20
> b)
> In addition:
>=20
>            |  B  |  Pass-through               |  N/A           |
>             |     |   Working: no switch        |                |
>             |     |   Protection: pass through  |                |
> For pass-through state, why the working and protection tunnel states=20
> are different?
[Authors]
When a node is in pass-through state, it allows traffic to be forwarded =
on either the working tunnel or the protection tunnel.

As described in section 5.1.3,
For working ring tunnel, "no switch" means traffic is carried on this =
tunnel.
For protection ring tunnel, "no switch" means traffic is blocked on the =
protection tunnel, and "pass-through" means traffic can be forwarded on =
the protection tunnel.

> c)
> |  D  |  Idle - LW                  |  NR            |
>=20
> What is the LW?  I guess it means "Lock of Working", but it needs to=20
> be expanded it when first use.
[Authors]

LW means Lockout of Working, it has been expanded when first use, and =
the acronym "LW" is added right after the full name.

Best regards,
Mach




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From: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
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Thread-Topic: Routing area draft minutes available
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Date: Fri, 31 Mar 2017 16:30:15 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-dir/16Xz8fReFUbGEWVmI3z8n_5qPhE>
Subject: [RTG-DIR] Routing area draft minutes available
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The draft minutes for the RTGAREA meeting at IETF 98 are now available.  Pl=
ease let me know if you have any comments.
https://www.ietf.org/proceedings/98/minutes/minutes-98-rtgarea-00

Best regards
Jon

