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To: "mpls@ietf.org" <mpls@ietf.org>
Cc: "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>
From: Loa Andersson <loa@pi.nu>
Message-ID: <14c7b495-b3ce-8f81-d7ef-7abc33424acb@pi.nu>
Date: Mon, 5 Jun 2017 09:39:08 +0200
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Subject: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping
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Working Group, authors,

We have started to prepare the the draft-ietf-mpls-spring-lsp-ping for
wglc, prior to the wglc we need to do an IPR poll.

This mail starts this IPR poll.

Are you aware of any IPR that applies to
draft-ietf-mpls-spring-lsp-ping?

If so, has this IPR been disclosed in compliance with IETF IPR rules
(see RFCs 3979, 4879, 3669 and 5378 for more details).

No IPR disclosures have been submitted directly on draft-ietf-mpls-
spring-lsp-ping or the individual document it replaced.

If you are listed as a document author or contributor please respond to
this email regardless of whether or not you are aware of any relevant
IPR. *The response needs to be sent to the MPLS WG mailing list.* The
document will not advance to the next stage until a response has been
received from each author and contributor.

If you are on the MPLS WG email list but are not listed as an author or
contributor, then please explicitly respond only if you are aware of any
IPR that has not yet been disclosed in conformance with IETF rules.

Since this document might be of interest for the SPRING wg, it has been
copied to the SPRING wg mailing list.

/Loa
mpls wg co-chair
-- 


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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From: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>
To: Loa Andersson <loa@pi.nu>
CC: "mpls@ietf.org" <mpls@ietf.org>, "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: IPR poll on draft-ietf-mpls-spring-lsp-ping
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Date: Mon, 5 Jun 2017 12:35:34 +0000
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From nobody Mon Jun  5 05:50:07 2017
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From: "Nagendra Kumar Nainar (naikumar)" <naikumar@cisco.com>
To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>
CC: "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: IPR poll on draft-ietf-mpls-spring-lsp-ping
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Date: Mon, 5 Jun 2017 12:50:00 +0000
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Subject: Re: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping
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From nobody Tue Jun  6 02:46:35 2017
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To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>
Cc: "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>,  "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>
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From: Hannes Gredler <hannes@gredler.at>
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Subject: Re: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping
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hi loa,

i am not aware of any IPR around draft-ietf-mpls-spring-lsp-ping.

/hannes

On 6/5/17 09:39, Loa Andersson wrote:
> Working Group, authors,
> 
> We have started to prepare the the draft-ietf-mpls-spring-lsp-ping for
> wglc, prior to the wglc we need to do an IPR poll.
> 
> This mail starts this IPR poll.
> 
> Are you aware of any IPR that applies to
> draft-ietf-mpls-spring-lsp-ping?
> 
> If so, has this IPR been disclosed in compliance with IETF IPR rules
> (see RFCs 3979, 4879, 3669 and 5378 for more details).
> 
> No IPR disclosures have been submitted directly on draft-ietf-mpls-
> spring-lsp-ping or the individual document it replaced.
> 
> If you are listed as a document author or contributor please respond to
> this email regardless of whether or not you are aware of any relevant
> IPR. *The response needs to be sent to the MPLS WG mailing list.* The
> document will not advance to the next stage until a response has been
> received from each author and contributor.
> 
> If you are on the MPLS WG email list but are not listed as an author or
> contributor, then please explicitly respond only if you are aware of any
> IPR that has not yet been disclosed in conformance with IETF rules.
> 
> Since this document might be of interest for the SPRING wg, it has been
> copied to the SPRING wg mailing list.
> 
> /Loa
> mpls wg co-chair


From nobody Tue Jun  6 18:09:14 2017
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From: Mach Chen <mach.chen@huawei.com>
To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>
CC: "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: IPR poll on draft-ietf-mpls-spring-lsp-ping
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Hello,=20

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=20

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.=20

Apologies that this review comes well after the end of IETF last call, =
however, I have only recently received the request for review.

Adrian

=3D=3D=3D=3D

Document: draft-ietf-spring-ipv6-use-cases-10.txt
 Reviewer: Adrian Farrel
 Review Date: 8th June 2017
 IETF LC End Date: 4th May 2017
 Intended Status: Informational

Summary:=20

I have some minor concerns about this document that I think should be =
resolved before publication.=20

Comments:=20

This document supplies primary use cases for SRv6 in a variety of =
environments. While originally intended to help motivate the SR =
architecture, this document now provides a set of use cases that explain =
how the technology might be used.

The document is easy to read and should be published as a helpful =
explanation of how SRv6 could be used.

=3D=3D=3D=3D

Major Issues:
None found.

=3D=3D=3D=3D

Minor Issues:=20

While I think this document is useful and should be published, the=20
motivation given in the Abstract suggests that the Architecture is
dependent on this draft. That is clearly not the case (since that I-D
has already progressed through IETF last call and only makes Informative
reference to this document).  That shouldn't be an issue of any=20
significance but probably some rewording is needed, such as...

   The Source Packet Routing in Networking (SPRING) architecture
   describes how Segment Routing can be used to steer packets through
   an IPv6 or MPLS network using the source routing paradigm.

   This document illustrates some use cases for Segment Routing in an=20
   IPv6 environment.

---

Terminology...

The document mixes "SPRING" and "spring". I think it should always be
upper case.

But I also think that the balance between "SPRING" and "Segment Routing"
may reflect the age of the document. That maybe doesn't need to be=20
fixed, but the document might align better with other documents if it
was.

Finally, there is some confusion about what a "segment" is. I think we
previously had this conversation with regard to=20
draft-ietf-idr-bgp-prefix-sid and concluded that:
   A segment represents either a topological instruction such
   as "go to prefix P following shortest path" or a service instruction
   (e.g.: "pass through deep packet inspection").

   A segment is identified through a Segment Identifier (SID).

---

I fully believe in the value of running SR in an IPv6 network, but I
think that some of the motivation provided in the Introduction is=20
dubious. The text reads...

   In addition there are cases where the operators could have made the
   design choice to disable IPv4, for ease of management and scale
   (return to single-stack) or due to an address constraint, for example
   because they do not possess enough IPv4 addresses resources to number
   all the endpoints and other network elements on which they desire to
   run MPLS.

   In such scenario the support for MPLS operations on an IPv6-only
   network would be required.  However today's IPv6-only networks are
   not fully capable of supporting MPLS.

This point does not motivate SRv6 since today's IPv6-only networks are   =

also not fully capable of supporting SRv6.
  =20
   There is ongoing work in the
   MPLS Working Group, described in [RFC7439] to identify gaps that must
   be addressed in order to allow MPLS-related protocols and
   applications to be used with IPv6-only networks.

RFC 7439 is now over two years old. Work on filling the gaps identified
began when draft-mpls-ipv6-only-gap was first published in 2013. In the
time since then a number of RFCs have been published to fill the gaps
and implementations have been upgraded.

   This is an another
   example of scenario where a solution relying on IPv6 without
   requiring the use of MPLS could represent a valid option to solve the
   problem and meet operators' requirements.

My conclusion is that this document is trying to oversell the use of=20
SR in an IPv6 network where no such sale needs to be made. The result is
that it appears to disparage MPLS where it should be enough to say that
a choice can be made, and then lay out the use cases where that choice
is made and explain how the network works when the choice is made.

I would suggest simply removing these paragraphs with the result of a
stronger statement of use rather than an arguable statement of=20
motivation.

---

Section 1

   3.  There is a need or desire to remove routing state from any node
       other than the source, such that the source is the only node that
       knows and will know the path a packet will take, a priori

I think this is a little confused. Obviously, you still have routing
state in the nodes within the network for everything other than=20
adjacency SIDs. I think that what you are removing from the network is
path state (or control plane signaling state). How about...

   3.  There is a need or desire to remove as much state as possible=20
       from the nodes in the network such that the source is the only
       node that knows the path a packet will take through the network.

---

Section 1

I'm not really convinced by the fourth bullet. It's true that IP=20
addresses can be aggregated so that one advertisement can carry a prefix
but this also applies to address advertisements that carry MPLS SIDs.
I think you are probably making a point about how an end-to-end SID can
be routed across a network without the need for a SID stack, but it is a
bit hard to extract from the text.

---

The start of Section 2 has the same issue as the Abstract. I suggest...

OLD

   This section will describe some scenarios where MPLS may not be
   present and it will highlight the need for the spring architecture to
   take them into account.

   The use cases described in the section do not constitute an
   exhaustive list of all the possible scenarios; this section only
   includes some of the most common envisioned deployment models for
   IPv6 Segment Routing.  In addition to the use cases described in this
   document the spring architecture should be able to be applied to all
   the use cases described in [RFC7855] for the spring MPLS data plane,
   when an IPv6 data plane is present.

NEW

   This section describes some scenarios where segment routing is=20
   applicable in an IPv6 environment.

   The use cases described in the section do not constitute an
   exhaustive list of all the possible scenarios: this section only
   includes some of the most common envisioned deployment models for
   IPv6 Segment Routing.  In addition to the use cases described in this
   document the spring architecture could be able to be applied to all
   the use cases described in [RFC7855] for the spring MPLS data plane,
   when an IPv6 data plane is present.

=3D=3D=3D=3D

Nits:=20

You'll need to expand some abbreviations like QAM and DOCSIS.=20
You can check https://www.rfc-editor.org/materials/abbrev.expansion.txt

---

Section 2.3

OLD
   In such scenario Segment Routing
NEW
   In such scenarios, Segment Routing
END

---

OLD
2.4.  SPRING in the Content Delivery Networks
NEW
2.4.  SPRING in Content Delivery Networks
END

---

OLD
2.5.  SPRING in the Core networks
NEW
2.5.  SPRING in Core Networks
END


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From: Sri <sriganeshkini@gmail.com>
Date: Thu, 8 Jun 2017 22:51:33 -0700
Message-ID: <CAOndX-u7XfXbJzX-NNVNuZ7papdsXZ7LVywnszzD8eorccd9kg@mail.gmail.com>
To: Loa Andersson <loa@pi.nu>
Cc: "mpls@ietf.org" <mpls@ietf.org>,  "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>,  "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/3T_WZwyFBrNBu61nXy7vKGpzMUM>
Subject: Re: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping
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Not aware of any IPR.

Sri

On Mon, Jun 5, 2017 at 12:39 AM, Loa Andersson <loa@pi.nu> wrote:

> Working Group, authors,
>
> We have started to prepare the the draft-ietf-mpls-spring-lsp-ping for
> wglc, prior to the wglc we need to do an IPR poll.
>
> This mail starts this IPR poll.
>
> Are you aware of any IPR that applies to
> draft-ietf-mpls-spring-lsp-ping?
>
> If so, has this IPR been disclosed in compliance with IETF IPR rules
> (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
> No IPR disclosures have been submitted directly on draft-ietf-mpls-
> spring-lsp-ping or the individual document it replaced.
>
> If you are listed as a document author or contributor please respond to
> this email regardless of whether or not you are aware of any relevant
> IPR. *The response needs to be sent to the MPLS WG mailing list.* The
> document will not advance to the next stage until a response has been
> received from each author and contributor.
>
> If you are on the MPLS WG email list but are not listed as an author or
> contributor, then please explicitly respond only if you are aware of any
> IPR that has not yet been disclosed in conformance with IETF rules.
>
> Since this document might be of interest for the SPRING wg, it has been
> copied to the SPRING wg mailing list.
>
> /Loa
> mpls wg co-chair
> --
>
>
> Loa Andersson                        email: loa@mail01.huawei.com
> Senior MPLS Expert                          loa@pi.nu
> Huawei Technologies (consultant)     phone: +46 739 81 21 64
>

--001a1147c4eea02cb60551809184
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<div dir=3D"ltr">Not aware of any IPR.<div><br></div><div>Sri</div></div><d=
iv class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jun 5, 2017=
 at 12:39 AM, Loa Andersson <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;padd=
ing-left:1ex">Working Group, authors,<br>
<br>
We have started to prepare the the draft-ietf-mpls-spring-lsp-pin<wbr>g for=
<br>
wglc, prior to the wglc we need to do an IPR poll.<br>
<br>
This mail starts this IPR poll.<br>
<br>
Are you aware of any IPR that applies to<br>
draft-ietf-mpls-spring-lsp-pin<wbr>g?<br>
<br>
If so, has this IPR been disclosed in compliance with IETF IPR rules<br>
(see RFCs 3979, 4879, 3669 and 5378 for more details).<br>
<br>
No IPR disclosures have been submitted directly on draft-ietf-mpls-<br>
spring-lsp-ping or the individual document it replaced.<br>
<br>
If you are listed as a document author or contributor please respond to<br>
this email regardless of whether or not you are aware of any relevant<br>
IPR. *The response needs to be sent to the MPLS WG mailing list.* The<br>
document will not advance to the next stage until a response has been<br>
received from each author and contributor.<br>
<br>
If you are on the MPLS WG email list but are not listed as an author or<br>
contributor, then please explicitly respond only if you are aware of any<br=
>
IPR that has not yet been disclosed in conformance with IETF rules.<br>
<br>
Since this document might be of interest for the SPRING wg, it has been<br>
copied to the SPRING wg mailing list.<br>
<br>
/Loa<br>
mpls wg co-chair<span class=3D"HOEnZb"><font color=3D"#888888"><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>
</font></span></blockquote></div><br></div>

--001a1147c4eea02cb60551809184--


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Subject: Re: [spring] RtgDir Review draft-ietf-spring-ipv6-use-cases-10
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From: Nobo Akiya <nobo.akiya.dev@gmail.com>
Date: Fri, 9 Jun 2017 20:28:23 +0900
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To: Loa Andersson <loa@pi.nu>
Cc: "mpls@ietf.org" <mpls@ietf.org>,  "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>,  "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "spring@ietf.org" <spring@ietf.org>
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Subject: Re: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping
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Hi Loa,

I am not aware of any IPR that applies to draft-ietf-mpls-spring-lsp-ping.

Regards,
Nobo

On Mon, Jun 5, 2017 at 4:39 PM, Loa Andersson <loa@pi.nu> wrote:

> Working Group, authors,
>
> We have started to prepare the the draft-ietf-mpls-spring-lsp-ping for
> wglc, prior to the wglc we need to do an IPR poll.
>
> This mail starts this IPR poll.
>
> Are you aware of any IPR that applies to
> draft-ietf-mpls-spring-lsp-ping?
>
> If so, has this IPR been disclosed in compliance with IETF IPR rules
> (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
> No IPR disclosures have been submitted directly on draft-ietf-mpls-
> spring-lsp-ping or the individual document it replaced.
>
> If you are listed as a document author or contributor please respond to
> this email regardless of whether or not you are aware of any relevant
> IPR. *The response needs to be sent to the MPLS WG mailing list.* The
> document will not advance to the next stage until a response has been
> received from each author and contributor.
>
> If you are on the MPLS WG email list but are not listed as an author or
> contributor, then please explicitly respond only if you are aware of any
> IPR that has not yet been disclosed in conformance with IETF rules.
>
> Since this document might be of interest for the SPRING wg, it has been
> copied to the SPRING wg mailing list.
>
> /Loa
> mpls wg co-chair
> --
>
>
> 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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<div dir=3D"ltr">Hi Loa,<div><br></div><div><span style=3D"font-size:12.8px=
">I am not aware of any IPR that applies to=C2=A0</span><span class=3D"gmai=
l-il" style=3D"font-size:12.8px;background-color:rgb(255,255,255)">draft</s=
pan><span style=3D"font-size:12.8px">-</span><span class=3D"gmail-il" style=
=3D"font-size:12.8px;background-color:rgb(255,255,255)">ietf</span><span st=
yle=3D"font-size:12.8px">-</span><span class=3D"gmail-il" style=3D"font-siz=
e:12.8px;background-color:rgb(255,255,255)">mpls</span><span style=3D"font-=
size:12.8px">-</span><span class=3D"gmail-il" style=3D"font-size:12.8px;bac=
kground-color:rgb(255,255,255)">spring</span><span style=3D"font-size:12.8p=
x">-</span><span class=3D"gmail-il" style=3D"font-size:12.8px;background-co=
lor:rgb(255,255,255)">lsp</span><span style=3D"font-size:12.8px">-</span><w=
br style=3D"font-size:12.8px"><span class=3D"gmail-il" style=3D"font-size:1=
2.8px;background-color:rgb(255,255,255)">ping</span><span style=3D"font-siz=
e:12.8px">.</span><br style=3D"font-size:12.8px"><br style=3D"font-size:12.=
8px"><span style=3D"font-size:12.8px">Regards,<br></span>Nobo</div></div><d=
iv class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mon, Jun 5, 2017=
 at 4:39 PM, Loa Andersson <span dir=3D"ltr">&lt;<a href=3D"mailto:loa@pi.n=
u" 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;padd=
ing-left:1ex">Working Group, authors,<br>
<br>
We have started to prepare the the draft-ietf-mpls-spring-lsp-pin<wbr>g for=
<br>
wglc, prior to the wglc we need to do an IPR poll.<br>
<br>
This mail starts this IPR poll.<br>
<br>
Are you aware of any IPR that applies to<br>
draft-ietf-mpls-spring-lsp-pin<wbr>g?<br>
<br>
If so, has this IPR been disclosed in compliance with IETF IPR rules<br>
(see RFCs 3979, 4879, 3669 and 5378 for more details).<br>
<br>
No IPR disclosures have been submitted directly on draft-ietf-mpls-<br>
spring-lsp-ping or the individual document it replaced.<br>
<br>
If you are listed as a document author or contributor please respond to<br>
this email regardless of whether or not you are aware of any relevant<br>
IPR. *The response needs to be sent to the MPLS WG mailing list.* The<br>
document will not advance to the next stage until a response has been<br>
received from each author and contributor.<br>
<br>
If you are on the MPLS WG email list but are not listed as an author or<br>
contributor, then please explicitly respond only if you are aware of any<br=
>
IPR that has not yet been disclosed in conformance with IETF rules.<br>
<br>
Since this document might be of interest for the SPRING wg, it has been<br>
copied to the SPRING wg mailing list.<br>
<br>
/Loa<br>
mpls wg co-chair<span class=3D"HOEnZb"><font color=3D"#888888"><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>
</font></span></blockquote></div><br></div>

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: OSPF WG List <ospf@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>
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Thread-Topic: OSPFv2 Segment Routing Extensions  ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Subject: Re: [spring] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Acee,

my question is whether we need the whole section 6 and the SID/Label 
Binding Sub-TLV that it specifies. In OSPF Binding SID is not used for 
SRMS advertisement like in ISIS.

thanks,
Peter



On 09/06/17 16:45 , Acee Lindem (acee) wrote:
> Corrected IS-IS WG alias â€“ Please reply to this one.
> Thanks,
> Acee
>
> From: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
> Date: Friday, June 9, 2017 at 10:42 AM
> To: OSPF WG List <ospf@ietf.org <mailto:ospf@ietf.org>>,
> "spring@ietf.org <mailto:spring@ietf.org>" <spring@ietf.org
> <mailto:spring@ietf.org>>, "isis@ietf.org <mailto:isis@ietf.org>"
> <isis@ietf.org <mailto:isis@ietf.org>>
> Cc: "draft-ietf-ospf-segment-routing-extensions@ietf.org
> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>"
> <draft-ietf-ospf-segment-routing-extensions@ietf.org
> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>>
> Subject: OSPFv2 Segment Routing Extensions ERO Extensions (would also
> effect OSPFv3 and IS-IS)
>
>     Hi OSPF, ISIS, and SPRING WGs,
>
>     As part of the Aliaâ€™s AD review, she uncovered the fact that the ERO
>     extensions in 6.1 and 6.2 are specified as far as encoding but are
>     not specified as far as usage in any IGP or SPRING document. As
>     document shepherd,  my proposal is that they simply be removed since
>     they were incorporated as part of a draft merge and it appears that
>     no one has implemented them (other than parsing). We could also
>     deprecate types (4-8) in the OSPFv2 Extended Prefix LSA Sub-TLV
>     registry to delay usage of these code points for some time (or
>     indefinitely ;^).
>
>     Thanks,
>     Acee
>


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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "Peter Psenak (ppsenak)" <ppsenak@cisco.com>, OSPF WG List <ospf@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>
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Thread-Topic: OSPFv2 Segment Routing Extensions  ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Subject: Re: [spring] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Hi,

I would like to get some feedback on the usage of the SID/Label Binding TLV.

Is there any implementation that uses SID/Label Binding TLV for 
advertising the SID/Label binding to a FEC as specified in section 6 of 
the draft-ietf-ospf-segment-routing-extensions-16 or section 2.4 of 
draft-ietf-isis-segment-routing-extensions-12?

If not, do we see this as something we want to preserve in the IGP SR 
drafts?

ISIS uses The SID/Label Binding TLV to advertise
prefixes to SID/Label mappings, which is known to be supported by 
several implementations and that piece needs to be preserved.

thanks,
Peter

On 09/06/17 19:04 , Peter Psenak wrote:
> Acee,
>
> my question is whether we need the whole section 6 and the SID/Label
> Binding Sub-TLV that it specifies. In OSPF Binding SID is not used for
> SRMS advertisement like in ISIS.
>
> thanks,
> Peter
>
>
>
> On 09/06/17 16:45 , Acee Lindem (acee) wrote:
>> Corrected IS-IS WG alias â€“ Please reply to this one.
>> Thanks,
>> Acee
>>
>> From: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
>> Date: Friday, June 9, 2017 at 10:42 AM
>> To: OSPF WG List <ospf@ietf.org <mailto:ospf@ietf.org>>,
>> "spring@ietf.org <mailto:spring@ietf.org>" <spring@ietf.org
>> <mailto:spring@ietf.org>>, "isis@ietf.org <mailto:isis@ietf.org>"
>> <isis@ietf.org <mailto:isis@ietf.org>>
>> Cc: "draft-ietf-ospf-segment-routing-extensions@ietf.org
>> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>"
>> <draft-ietf-ospf-segment-routing-extensions@ietf.org
>> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>>
>> Subject: OSPFv2 Segment Routing Extensions ERO Extensions (would also
>> effect OSPFv3 and IS-IS)
>>
>>     Hi OSPF, ISIS, and SPRING WGs,
>>
>>     As part of the Aliaâ€™s AD review, she uncovered the fact that the ERO
>>     extensions in 6.1 and 6.2 are specified as far as encoding but are
>>     not specified as far as usage in any IGP or SPRING document. As
>>     document shepherd,  my proposal is that they simply be removed since
>>     they were incorporated as part of a draft merge and it appears that
>>     no one has implemented them (other than parsing). We could also
>>     deprecate types (4-8) in the OSPFv2 Extended Prefix LSA Sub-TLV
>>     registry to delay usage of these code points for some time (or
>>     indefinitely ;^).
>>
>>     Thanks,
>>     Acee
>>
>
> .
>


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From: <bruno.decraene@orange.com>
To: "spring@ietf.org" <spring@ietf.org>
CC: "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>, Peter Psenak <ppsenak@cisco.com>, OSPF WG List <ospf@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
Thread-Index: AQHS41RxkDp00xecFEeeXiZuhgxE8qIhJOwQ
Date: Mon, 12 Jun 2017 12:50:05 +0000
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>
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Thread-Topic: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Date: Mon, 12 Jun 2017 06:05:20 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>
CC: "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>, OSPF WG List <ospf@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "Peter Psenak (ppsenak)" <ppsenak@cisco.com>
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Thread-Topic: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Hi,

I have got pretty much same view as Acee.
There are many application (future, to my knowledge no products) for which =
the concept of Binding SID (anchor node) is central, I=E2=80=99m aware of ISIS imp=
lementation, didn=E2=80=99t see OSPF.
=20
Currently, I don=E2=80=99t see any use to ERO extensions, perhaps could be remove=
d from base specs and added later, if/when clear use case shows up.
=20
Cheers,
Jeff
=20
On 6/12/17, 05:57, "Acee Lindem (acee)" <acee@cisco.com> wrote:

    Hi Bruno,=20
   =20
    Here is my view. =20
   =20
    On 6/12/17, 8:50 AM, "spring on behalf of bruno.decraene@orange.com"
    <spring-bounces@ietf.org on behalf of bruno.decraene@orange.com> wrote:
   =20
    >Hello SPRING WG,
    >
    >I'd like to encourage discussion on this thread.
    >
    >The related questions seem to be:
    >- Binding SIDs:
    >	-  Is there any implementation?
    >	- Is it useful?
    >	- Does it need to be specified?
   =20
    Binding SIDs as an architectural concept are very useful and will be
    leveraged by numerous use cases. For example, one implemented use case =
is
    BGP SR-TE.=20
    >
    >- Binding SIDs advertised in IGP:
    >	-  Is there any implementation?
    >	 - Is it useful?
    >	- Does it need to be specified?
   =20
    At least for OSPF(v3), we currently don=E2=80=99t see any usage of binding SI=
Ds. I
    believe there is a use case for IS-IS but I=E2=80=99ll defer to the authors o=
f the
    IS-IS SR draft and implementation to elaborate.
   =20
    As for the Bind SID ERO extensions, to the best of my knowledge, they a=
re
    not implemented or used by either OSPF or IS-IS.
   =20
    >
    >As of today, there seem to be multiple SPRING (related) document that
    >make reference (define/use) to the Binding SIDs. e.g.
    >- architecture=20
    >https://tools.ietf.org/html/draft-ietf-spring-segment-routing-11#secti=
on-3
    >.5.2
    >- MPLS instantiation
    >https://tools.ietf.org/html/draft-ietf-spring-segment-routing-mpls-08#=
sect
    >ion-2
    >- non-protected paths
    >https://tools.ietf.org/html/draft-litkowski-spring-non-protected-paths=
-01#
    >section-3.3
    >- SR policies:=20
    >https://tools.ietf.org/html/draft-filsfils-spring-segment-routing-poli=
cy-0
    >0#section-7
    >
    >
    >However, it also seems a priori possible to define Binding SIDs and no=
t
    >advertised them in the IGP. (e.g. by keeping them local to the PCE)
    >
    >On a side note, if the Binding SIDs are removed from the IGP, do they
    >need to be removed from the BGP-LS extensions? [+IDR chairs]
   =20
    At least the ERO extensions should be removed.
   =20
    Thanks,
    Acee=20
    >
    >Thanks,
    >Regards,
    >--Bruno
    >
    >> From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Peter Psenak
    >> Sent: Monday, June 12, 2017 10:18 AM
    > > To: OSPF WG List; spring@ietf.org; isis-wg@ietf.org
    > > Cc: draft-ietf-ospf-segment-routing-extensions@ietf.org
    > > Subject: Re: [OSPF] OSPFv2 Segment Routing Extensions ERO Extension=
s
    >(would also effect
    > > OSPFv3 and IS-IS) - REPLY TO THIS ONE
    > >=20
    > > Hi,
    > >=20
    > > I would like to get some feedback on the usage of the SID/Label
    >Binding TLV.
    > >=20
    > > Is there any implementation that uses SID/Label Binding TLV for
    > > advertising the SID/Label binding to a FEC as specified in section =
6 of
    > > the draft-ietf-ospf-segment-routing-extensions-16 or section 2.4 of
    > > draft-ietf-isis-segment-routing-extensions-12?
    > >=20
    > > If not, do we see this as something we want to preserve in the IGP =
SR
    > > drafts?
    > >=20
    > > ISIS uses The SID/Label Binding TLV to advertise
    > > prefixes to SID/Label mappings, which is known to be supported by
    > > several implementations and that piece needs to be preserved.
    > >=20
    > > thanks,
    > > Peter
    > >=20
    > > On 09/06/17 19:04 , Peter Psenak wrote:
    > > > Acee,
    > > >
    > > > my question is whether we need the whole section 6 and the SID/La=
bel
    > > > Binding Sub-TLV that it specifies. In OSPF Binding SID is not use=
d
    >for
    > > > SRMS advertisement like in ISIS.
    > > >
    > > > thanks,
    > > > Peter
    > > >
    > > >
    > > >
    > > > On 09/06/17 16:45 , Acee Lindem (acee) wrote:
    > > >> Corrected IS-IS WG alias =E2=80=93 Please reply to this one.
    > > >> Thanks,
    > > >> Acee
    > > >>
    > > >> From: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
    > > >> Date: Friday, June 9, 2017 at 10:42 AM
    > > >> To: OSPF WG List <ospf@ietf.org <mailto:ospf@ietf.org>>,
    > > >> "spring@ietf.org <mailto:spring@ietf.org>" <spring@ietf.org
    > > >> <mailto:spring@ietf.org>>, "isis@ietf.org <mailto:isis@ietf.org>=
"
    > > >> <isis@ietf.org <mailto:isis@ietf.org>>
    > > >> Cc: "draft-ietf-ospf-segment-routing-extensions@ietf.org
    > > >> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>"
    > > >> <draft-ietf-ospf-segment-routing-extensions@ietf.org
    > > >> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>>
    > > >> Subject: OSPFv2 Segment Routing Extensions ERO Extensions (would
    >also
    > > >> effect OSPFv3 and IS-IS)
    > > >>
    > > >>     Hi OSPF, ISIS, and SPRING WGs,
    > > >>
    > > >>     As part of the Alia=E2=80=99s AD review, she uncovered the fact th=
at
    >the ERO
    > > >>     extensions in 6.1 and 6.2 are specified as far as encoding b=
ut
    >are
    > > >>     not specified as far as usage in any IGP or SPRING document.=
 As
    > > >>     document shepherd,  my proposal is that they simply be remov=
ed
    >since
    > > >>     they were incorporated as part of a draft merge and it appea=
rs
    >that
    > > >>     no one has implemented them (other than parsing). We could a=
lso
    > > >>     deprecate types (4-8) in the OSPFv2 Extended Prefix LSA Sub-=
TLV
    > > >>     registry to delay usage of these code points for some time (=
or
    > > >>     indefinitely ;^).
    > > >>
    > > >>     Thanks,
    > > >>     Acee
    > > >>
    > > >
    > > > .
    > > >
    > >=20
    > > _______________________________________________
    > > OSPF mailing list
    > > OSPF@ietf.org
    > > https://www.ietf.org/mailman/listinfo/ospf
    >
    >______________________________________________________________________=
____
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   =20
   =20



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From: Rob Shakir <rjs@rob.sh>
Date: Mon, 12 Jun 2017 13:08:14 +0000
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To: bruno.decraene@orange.com, "spring@ietf.org" <spring@ietf.org>
Cc: "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>,  OSPF WG List <ospf@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>,  "idr-chairs@ietf.org" <idr-chairs@ietf.org>, Peter Psenak <ppsenak@cisco.com>
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Bruno, SPRING,

I am aware of at least one implementation that makes heavy use of Binding
SIDs, so I do not think that this is something that we can remove from the
protocol specification. It seems to me that we have a number of cases that
continue to exist that make it useful to have them specified, particularly:

   - Binding of a SID to a deeper label stack to prevent there being large
   label stacks required on ingress. This is required due to limited push
   depth, and limited readable label depths for hashing.
   - Re-use of some other protocol's or network's forwarding path by a
   device that is imposing an SR label stack.

There is not an alternative construct that can be used for this purpose, so
we should not remove it.

In both of these cases there seems, to me, to be a use case for having the
information in the IGP in the case that an implementation computes TE paths
using cSPF, having binding SID information available to it (along with the
ERO) enables it to reduce the label stack depth by finding binding SIDs
that follow the same path as the computed ERO. Without the ERO (which might
not be an RSVP-TE ERO, but I believe that it how it was first envisaged)
how can the head-end of an TE path know what path the advertised Binding
SID takes? It's fine to punt this and say "the PCE in the sky will know" -
however, I believe SPRING's charter doesn't limit the technology to only
centralised computation of paths.

I don't believe current demand for this is a good reason to remove it from
the protocol specification - it is still somewhat early days for folks
deploying TE based on SR - where I think the Binding SID concept is most
important.

r.

On Mon, 12 Jun 2017 at 05:50 <bruno.decraene@orange.com> wrote:

> Hello SPRING WG,
>
> I'd like to encourage discussion on this thread.
>
> The related questions seem to be:
> - Binding SIDs:
>         -  Is there any implementation?
>         - Is it useful?
>         - Does it need to be specified?
>
> - Binding SIDs advertised in IGP:
>         -  Is there any implementation?
>          - Is it useful?
>         - Does it need to be specified?
>
> As of today, there seem to be multiple SPRING (related) document that mak=
e
> reference (define/use) to the Binding SIDs. e.g.
> - architecture
> https://tools.ietf.org/html/draft-ietf-spring-segment-routing-11#section-=
3.5.2
> - MPLS instantiation
> https://tools.ietf.org/html/draft-ietf-spring-segment-routing-mpls-08#sec=
tion-2
> - non-protected paths
> https://tools.ietf.org/html/draft-litkowski-spring-non-protected-paths-01=
#section-3.3
> - SR policies:
> https://tools.ietf.org/html/draft-filsfils-spring-segment-routing-policy-=
00#section-7
>
>
> However, it also seems a priori possible to define Binding SIDs and not
> advertised them in the IGP. (e.g. by keeping them local to the PCE)
>
> On a side note, if the Binding SIDs are removed from the IGP, do they nee=
d
> to be removed from the BGP-LS extensions? [+IDR chairs]
>
> Thanks,
> Regards,
> --Bruno
>
> > From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Peter Psenak
> > Sent: Monday, June 12, 2017 10:18 AM
>  > To: OSPF WG List; spring@ietf.org; isis-wg@ietf.org
>  > Cc: draft-ietf-ospf-segment-routing-extensions@ietf.org
>  > Subject: Re: [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions
> (would also effect
>  > OSPFv3 and IS-IS) - REPLY TO THIS ONE
>  >
>  > Hi,
>  >
>  > I would like to get some feedback on the usage of the SID/Label Bindin=
g
> TLV.
>  >
>  > Is there any implementation that uses SID/Label Binding TLV for
>  > advertising the SID/Label binding to a FEC as specified in section 6 o=
f
>  > the draft-ietf-ospf-segment-routing-extensions-16 or section 2.4 of
>  > draft-ietf-isis-segment-routing-extensions-12?
>  >
>  > If not, do we see this as something we want to preserve in the IGP SR
>  > drafts?
>  >
>  > ISIS uses The SID/Label Binding TLV to advertise
>  > prefixes to SID/Label mappings, which is known to be supported by
>  > several implementations and that piece needs to be preserved.
>  >
>  > thanks,
>  > Peter
>  >
>  > On 09/06/17 19:04 , Peter Psenak wrote:
>  > > Acee,
>  > >
>  > > my question is whether we need the whole section 6 and the SID/Label
>  > > Binding Sub-TLV that it specifies. In OSPF Binding SID is not used f=
or
>  > > SRMS advertisement like in ISIS.
>  > >
>  > > thanks,
>  > > Peter
>  > >
>  > >
>  > >
>  > > On 09/06/17 16:45 , Acee Lindem (acee) wrote:
>  > >> Corrected IS-IS WG alias =E2=80=93 Please reply to this one.
>  > >> Thanks,
>  > >> Acee
>  > >>
>  > >> From: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
>  > >> Date: Friday, June 9, 2017 at 10:42 AM
>  > >> To: OSPF WG List <ospf@ietf.org <mailto:ospf@ietf.org>>,
>  > >> "spring@ietf.org <mailto:spring@ietf.org>" <spring@ietf.org
>  > >> <mailto:spring@ietf.org>>, "isis@ietf.org <mailto:isis@ietf.org>"
>  > >> <isis@ietf.org <mailto:isis@ietf.org>>
>  > >> Cc: "draft-ietf-ospf-segment-routing-extensions@ietf.org
>  > >> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>"
>  > >> <draft-ietf-ospf-segment-routing-extensions@ietf.org
>  > >> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>>
>  > >> Subject: OSPFv2 Segment Routing Extensions ERO Extensions (would al=
so
>  > >> effect OSPFv3 and IS-IS)
>  > >>
>  > >>     Hi OSPF, ISIS, and SPRING WGs,
>  > >>
>  > >>     As part of the Alia=E2=80=99s AD review, she uncovered the fact=
 that the
> ERO
>  > >>     extensions in 6.1 and 6.2 are specified as far as encoding but
> are
>  > >>     not specified as far as usage in any IGP or SPRING document. As
>  > >>     document shepherd,  my proposal is that they simply be removed
> since
>  > >>     they were incorporated as part of a draft merge and it appears
> that
>  > >>     no one has implemented them (other than parsing). We could also
>  > >>     deprecate types (4-8) in the OSPFv2 Extended Prefix LSA Sub-TLV
>  > >>     registry to delay usage of these code points for some time (or
>  > >>     indefinitely ;^).
>  > >>
>  > >>     Thanks,
>  > >>     Acee
>  > >>
>  > >
>  > > .
>  > >
>  >
>  > _______________________________________________
>  > OSPF mailing list
>  > OSPF@ietf.org
>  > https://www.ietf.org/mailman/listinfo/ospf
>
>
> _________________________________________________________________________=
________________________________________________
>
> Ce message et ses pieces jointes peuvent contenir des informations
> confidentielles ou privilegiees et ne doivent donc
> pas etre diffuses, exploites ou copies sans autorisation. Si vous avez
> recu ce message par erreur, veuillez le signaler
> a l'expediteur et le detruire ainsi que les pieces jointes. Les messages
> electroniques etant susceptibles d'alteration,
> Orange decline toute responsabilite si ce message a ete altere, deforme o=
u
> falsifie. Merci.
>
> This message and its attachments may contain confidential or privileged
> information that may be protected by law;
> they should not be distributed, used or copied without authorisation.
> If you have received this email in error, please notify the sender and
> delete this message and its attachments.
> As emails may be altered, Orange is not liable for messages that have bee=
n
> modified, changed or falsified.
> Thank you.
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--001a11c024a8a1b3660551c303e6
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Bruno, SPRING,<div><br></div><div>I am aware of at least o=
ne implementation that makes heavy use of Binding SIDs, so I do not think t=
hat this is something that we can remove from the protocol specification. I=
t seems to me that we have a number of cases that continue to exist that ma=
ke it useful to have them specified, particularly:</div><div><ul><li><font =
size=3D"2">Binding of a SID to a deeper label stack to prevent there being =
large label stacks required on ingress. This is required due to limited pus=
h depth, and limited readable label depths for hashing.</font></li><li><fon=
t size=3D"2">Re-use of some other protocol&#39;s or network&#39;s forwardin=
g path by a device that is imposing an SR label stack.</font></li></ul><div=
><font size=3D"2">There is not an alternative construct that can be used fo=
r this purpose, so we should not remove it.</font></div></div><div><font si=
ze=3D"2"><br></font></div><div><font size=3D"2">In both of these cases ther=
e seems, to me, to be a use case for having the information in the IGP in t=
he case that an implementation computes TE paths using cSPF, having binding=
 SID information available to it (along with the ERO) enables it to reduce =
the label stack depth by finding binding SIDs that follow the same path as =
the computed ERO. Without the ERO (which might not be an RSVP-TE ERO, but I=
 believe that it how it was first envisaged) how can the head-end of an TE =
path know what path the advertised Binding SID takes? It&#39;s fine to punt=
 this and say &quot;the PCE in the sky will know&quot; - however, I believe=
 SPRING&#39;s charter doesn&#39;t limit the technology to only centralised =
computation of paths.</font></div><div><font size=3D"2"><br></font></div><d=
iv><font size=3D"2">I don&#39;t believe current demand for this is a good r=
eason to remove it from the protocol specification - it is still somewhat e=
arly days for folks deploying TE based on SR - where I think the Binding SI=
D concept is most important.</font></div><div><font size=3D"2"><br></font><=
/div><div><font size=3D"2">r.</font></div></div><br><div class=3D"gmail_quo=
te"><div dir=3D"ltr">On Mon, 12 Jun 2017 at 05:50 &lt;<a href=3D"mailto:bru=
no.decraene@orange.com">bruno.decraene@orange.com</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px=
 #ccc solid;padding-left:1ex">Hello SPRING WG,<br>
<br>
I&#39;d like to encourage discussion on this thread.<br>
<br>
The related questions seem to be:<br>
- Binding SIDs:<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0 Is there any implementation?<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 - Is it useful?<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 - Does it need to be specified?<br>
<br>
- Binding SIDs advertised in IGP:<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0 Is there any implementation?<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0- Is it useful?<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 - Does it need to be specified?<br>
<br>
As of today, there seem to be multiple SPRING (related) document that make =
reference (define/use) to the Binding SIDs. e.g.<br>
- architecture <a href=3D"https://tools.ietf.org/html/draft-ietf-spring-seg=
ment-routing-11#section-3.5.2" rel=3D"noreferrer" target=3D"_blank">https:/=
/tools.ietf.org/html/draft-ietf-spring-segment-routing-11#section-3.5.2</a>=
<br>
- MPLS instantiation <a href=3D"https://tools.ietf.org/html/draft-ietf-spri=
ng-segment-routing-mpls-08#section-2" rel=3D"noreferrer" target=3D"_blank">=
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-mpls-08#secti=
on-2</a><br>
- non-protected paths <a href=3D"https://tools.ietf.org/html/draft-litkowsk=
i-spring-non-protected-paths-01#section-3.3" rel=3D"noreferrer" target=3D"_=
blank">https://tools.ietf.org/html/draft-litkowski-spring-non-protected-pat=
hs-01#section-3.3</a><br>
- SR policies: <a href=3D"https://tools.ietf.org/html/draft-filsfils-spring=
-segment-routing-policy-00#section-7" rel=3D"noreferrer" target=3D"_blank">=
https://tools.ietf.org/html/draft-filsfils-spring-segment-routing-policy-00=
#section-7</a><br>
<br>
<br>
However, it also seems a priori possible to define Binding SIDs and not adv=
ertised them in the IGP. (e.g. by keeping them local to the PCE)<br>
<br>
On a side note, if the Binding SIDs are removed from the IGP, do they need =
to be removed from the BGP-LS extensions? [+IDR chairs]<br>
<br>
Thanks,<br>
Regards,<br>
--Bruno<br>
<br>
&gt; From: OSPF [mailto:<a href=3D"mailto:ospf-bounces@ietf.org" target=3D"=
_blank">ospf-bounces@ietf.org</a>] On Behalf Of Peter Psenak<br>
&gt; Sent: Monday, June 12, 2017 10:18 AM<br>
=C2=A0&gt; To: OSPF WG List; <a href=3D"mailto:spring@ietf.org" target=3D"_=
blank">spring@ietf.org</a>; <a href=3D"mailto:isis-wg@ietf.org" target=3D"_=
blank">isis-wg@ietf.org</a><br>
=C2=A0&gt; Cc: <a href=3D"mailto:draft-ietf-ospf-segment-routing-extensions=
@ietf.org" target=3D"_blank">draft-ietf-ospf-segment-routing-extensions@iet=
f.org</a><br>
=C2=A0&gt; Subject: Re: [OSPF] OSPFv2 Segment Routing Extensions ERO Extens=
ions (would also effect<br>
=C2=A0&gt; OSPFv3 and IS-IS) - REPLY TO THIS ONE<br>
=C2=A0&gt;<br>
=C2=A0&gt; Hi,<br>
=C2=A0&gt;<br>
=C2=A0&gt; I would like to get some feedback on the usage of the SID/Label =
Binding TLV.<br>
=C2=A0&gt;<br>
=C2=A0&gt; Is there any implementation that uses SID/Label Binding TLV for<=
br>
=C2=A0&gt; advertising the SID/Label binding to a FEC as specified in secti=
on 6 of<br>
=C2=A0&gt; the draft-ietf-ospf-segment-routing-extensions-16 or section 2.4=
 of<br>
=C2=A0&gt; draft-ietf-isis-segment-routing-extensions-12?<br>
=C2=A0&gt;<br>
=C2=A0&gt; If not, do we see this as something we want to preserve in the I=
GP SR<br>
=C2=A0&gt; drafts?<br>
=C2=A0&gt;<br>
=C2=A0&gt; ISIS uses The SID/Label Binding TLV to advertise<br>
=C2=A0&gt; prefixes to SID/Label mappings, which is known to be supported b=
y<br>
=C2=A0&gt; several implementations and that piece needs to be preserved.<br=
>
=C2=A0&gt;<br>
=C2=A0&gt; thanks,<br>
=C2=A0&gt; Peter<br>
=C2=A0&gt;<br>
=C2=A0&gt; On 09/06/17 19:04 , Peter Psenak wrote:<br>
=C2=A0&gt; &gt; Acee,<br>
=C2=A0&gt; &gt;<br>
=C2=A0&gt; &gt; my question is whether we need the whole section 6 and the =
SID/Label<br>
=C2=A0&gt; &gt; Binding Sub-TLV that it specifies. In OSPF Binding SID is n=
ot used for<br>
=C2=A0&gt; &gt; SRMS advertisement like in ISIS.<br>
=C2=A0&gt; &gt;<br>
=C2=A0&gt; &gt; thanks,<br>
=C2=A0&gt; &gt; Peter<br>
=C2=A0&gt; &gt;<br>
=C2=A0&gt; &gt;<br>
=C2=A0&gt; &gt;<br>
=C2=A0&gt; &gt; On 09/06/17 16:45 , Acee Lindem (acee) wrote:<br>
=C2=A0&gt; &gt;&gt; Corrected IS-IS WG alias =E2=80=93 Please reply to this=
 one.<br>
=C2=A0&gt; &gt;&gt; Thanks,<br>
=C2=A0&gt; &gt;&gt; Acee<br>
=C2=A0&gt; &gt;&gt;<br>
=C2=A0&gt; &gt;&gt; From: Acee Lindem &lt;<a href=3D"mailto:acee@cisco.com"=
 target=3D"_blank">acee@cisco.com</a> &lt;mailto:<a href=3D"mailto:acee@cis=
co.com" target=3D"_blank">acee@cisco.com</a>&gt;&gt;<br>
=C2=A0&gt; &gt;&gt; Date: Friday, June 9, 2017 at 10:42 AM<br>
=C2=A0&gt; &gt;&gt; To: OSPF WG List &lt;<a href=3D"mailto:ospf@ietf.org" t=
arget=3D"_blank">ospf@ietf.org</a> &lt;mailto:<a href=3D"mailto:ospf@ietf.o=
rg" target=3D"_blank">ospf@ietf.org</a>&gt;&gt;,<br>
=C2=A0&gt; &gt;&gt; &quot;<a href=3D"mailto:spring@ietf.org" target=3D"_bla=
nk">spring@ietf.org</a> &lt;mailto:<a href=3D"mailto:spring@ietf.org" targe=
t=3D"_blank">spring@ietf.org</a>&gt;&quot; &lt;<a href=3D"mailto:spring@iet=
f.org" target=3D"_blank">spring@ietf.org</a><br>
=C2=A0&gt; &gt;&gt; &lt;mailto:<a href=3D"mailto:spring@ietf.org" target=3D=
"_blank">spring@ietf.org</a>&gt;&gt;, &quot;<a href=3D"mailto:isis@ietf.org=
" target=3D"_blank">isis@ietf.org</a> &lt;mailto:<a href=3D"mailto:isis@iet=
f.org" target=3D"_blank">isis@ietf.org</a>&gt;&quot;<br>
=C2=A0&gt; &gt;&gt; &lt;<a href=3D"mailto:isis@ietf.org" target=3D"_blank">=
isis@ietf.org</a> &lt;mailto:<a href=3D"mailto:isis@ietf.org" target=3D"_bl=
ank">isis@ietf.org</a>&gt;&gt;<br>
=C2=A0&gt; &gt;&gt; Cc: &quot;<a href=3D"mailto:draft-ietf-ospf-segment-rou=
ting-extensions@ietf.org" target=3D"_blank">draft-ietf-ospf-segment-routing=
-extensions@ietf.org</a><br>
=C2=A0&gt; &gt;&gt; &lt;mailto:<a href=3D"mailto:draft-ietf-ospf-segment-ro=
uting-extensions@ietf.org" target=3D"_blank">draft-ietf-ospf-segment-routin=
g-extensions@ietf.org</a>&gt;&quot;<br>
=C2=A0&gt; &gt;&gt; &lt;<a href=3D"mailto:draft-ietf-ospf-segment-routing-e=
xtensions@ietf.org" target=3D"_blank">draft-ietf-ospf-segment-routing-exten=
sions@ietf.org</a><br>
=C2=A0&gt; &gt;&gt; &lt;mailto:<a href=3D"mailto:draft-ietf-ospf-segment-ro=
uting-extensions@ietf.org" target=3D"_blank">draft-ietf-ospf-segment-routin=
g-extensions@ietf.org</a>&gt;&gt;<br>
=C2=A0&gt; &gt;&gt; Subject: OSPFv2 Segment Routing Extensions ERO Extensio=
ns (would also<br>
=C2=A0&gt; &gt;&gt; effect OSPFv3 and IS-IS)<br>
=C2=A0&gt; &gt;&gt;<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0Hi OSPF, ISIS, and SPRING WGs,<br>
=C2=A0&gt; &gt;&gt;<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0As part of the Alia=E2=80=99s AD rev=
iew, she uncovered the fact that the ERO<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0extensions in 6.1 and 6.2 are specif=
ied as far as encoding but are<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0not specified as far as usage in any=
 IGP or SPRING document. As<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0document shepherd,=C2=A0 my proposal=
 is that they simply be removed since<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0they were incorporated as part of a =
draft merge and it appears that<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0no one has implemented them (other t=
han parsing). We could also<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0deprecate types (4-8) in the OSPFv2 =
Extended Prefix LSA Sub-TLV<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0registry to delay usage of these cod=
e points for some time (or<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0indefinitely ;^).<br>
=C2=A0&gt; &gt;&gt;<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0Thanks,<br>
=C2=A0&gt; &gt;&gt;=C2=A0 =C2=A0 =C2=A0Acee<br>
=C2=A0&gt; &gt;&gt;<br>
=C2=A0&gt; &gt;<br>
=C2=A0&gt; &gt; .<br>
=C2=A0&gt; &gt;<br>
=C2=A0&gt;<br>
=C2=A0&gt; _______________________________________________<br>
=C2=A0&gt; OSPF mailing list<br>
=C2=A0&gt; <a href=3D"mailto:OSPF@ietf.org" target=3D"_blank">OSPF@ietf.org=
</a><br>
=C2=A0&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/ospf" rel=3D"no=
referrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/ospf</a><=
br>
<br>
___________________________________________________________________________=
______________________________________________<br>
<br>
Ce message et ses pieces jointes peuvent contenir des informations confiden=
tielles ou privilegiees et ne doivent donc<br>
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu=
 ce message par erreur, veuillez le signaler<br>
a l&#39;expediteur et le detruire ainsi que les pieces jointes. Les message=
s electroniques etant susceptibles d&#39;alteration,<br>
Orange decline toute responsabilite si ce message a ete altere, deforme ou =
falsifie. Merci.<br>
<br>
This message and its attachments may contain confidential or privileged inf=
ormation that may be protected by law;<br>
they should not be distributed, used or copied without authorisation.<br>
If you have received this email in error, please notify the sender and dele=
te this message and its attachments.<br>
As emails may be altered, Orange is not liable for messages that have been =
modified, changed or falsified.<br>
Thank you.<br>
<br>
_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank">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/listinfo/spring</a><br>
</blockquote></div>

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From: <bruno.decraene@orange.com>
To: "Acee Lindem (acee)" <acee@cisco.com>, "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>, "draft-ietf-isis-segment-routing-extensions@ietf.org" <draft-ietf-isis-segment-routing-extensions@ietf.org>
CC: "spring@ietf.org" <spring@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>, OSPF WG List <ospf@ietf.org>
Thread-Topic: [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
Thread-Index: AQHS4S8Y37adDddm1EW7MKj9+rQk+aIhPVmA
Date: Mon, 12 Jun 2017 13:37:46 +0000
Message-ID: <8753_1497274667_593E992B_8753_641_5_53C29892C857584299CBF5D05346208A4777B990@OPEXCLILM21.corporate.adroot.infra.ftgroup>
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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From: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
To: Rob Shakir <rjs@rob.sh>
CC: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>, OSPF WG List <ospf@ietf.org>, "Peter Psenak (ppsenak)" <ppsenak@cisco.com>, "isis-wg@ietf.org" <isis-wg@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Date: Mon, 12 Jun 2017 13:52:19 +0000
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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From: "Acee Lindem (acee)" <acee@cisco.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>, "draft-ietf-isis-segment-routing-extensions@ietf.org" <draft-ietf-isis-segment-routing-extensions@ietf.org>
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Thread-Topic: [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Date: Mon, 12 Jun 2017 13:59:03 +0000
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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--_000_D56414F9B2911aceeciscocom_--


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From: <bruno.decraene@orange.com>
To: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>, Rob Shakir <rjs@rob.sh>
CC: "spring@ietf.org" <spring@ietf.org>, "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>, OSPF WG List <ospf@ietf.org>, "Peter Psenak (ppsenak)" <ppsenak@cisco.com>, "isis-wg@ietf.org" <isis-wg@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
Thread-Index: AQHS43pxPoK2+M5eY0W0s4AwnhuIiqIhdf8AgAAMTQD//77gQA==
Date: Mon, 12 Jun 2017 14:05:44 +0000
Message-ID: <3310_1497276344_593E9FB8_3310_1913_1_53C29892C857584299CBF5D05346208A4777BAEA@OPEXCLILM21.corporate.adroot.infra.ftgroup>
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Date: Mon, 12 Jun 2017 16:10:15 +0200
From: Peter Psenak <ppsenak@cisco.com>
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To: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>, Rob Shakir <rjs@rob.sh>
CC: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>,  OSPF WG List <ospf@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Stefano, Rob,

the question is about the "usage of the SID/Label Binding TLV", not 
about the Binding SID concept. I don't know how to better describe the 
problem.

In ISIS SR draft SID/Label Binding TLV has two functions:

1. Advertise the SID/Label binding to a FEC
2. SRMS advertisements

In OSPF SID/Label Binding TLV has only one function:

1. Advertise the SID/Label binding to a FEC

The question is whether we need the function (1) at all in IGP SR drafts.

thanks,
Peter



On 12/06/17 15:52 , Stefano Previdi (sprevidi) wrote:
> Hi Rob,
>
> sorry for the mess. Iâ€™m afraid, the problem has been poorly described.
>
> Weâ€™re obviously NOT questioning the use of the Binding SID and weâ€™re NOT proposing the removal of it.
>
> What weâ€™re talking about is the set of RSVP-like/ERO-like subTLVs that have been defined in both isis and ospf protocols and for which, apparently, nobody has found yet any use.
>
> Can we try to shutdown the unnecessary noise and confusion ?
>
> Thanks.
> s.
>
>
>> On Jun 12, 2017, at 3:08 PM, Rob Shakir <rjs@rob.sh> wrote:
>>
>> Bruno, SPRING,
>>
>> I am aware of at least one implementation that makes heavy use of Binding SIDs, so I do not think that this is something that we can remove from the protocol specification.
>> It seems to me that we have a number of cases that continue to exist that make it useful to have them specified, particularly:
>> 	â€¢ Binding of a SID to a deeper label stack to prevent there being large label stacks required on ingress. This is required due to limited push depth, and limited readable label depths for hashing.
>> 	â€¢ Re-use of some other protocol's or network's forwarding path by a device that is imposing an SR label stack.
>> There is not an alternative construct that can be used for this purpose, so we should not remove it.
>>
>> In both of these cases there seems, to me, to be a use case for having the information in the IGP in the case that an implementation computes TE paths using cSPF, having binding SID information available to it (along with the ERO) enables it to reduce the label stack depth by finding binding SIDs that follow the same path as the computed ERO. Without the ERO (which might not be an RSVP-TE ERO, but I believe that it how it was first envisaged) how can the head-end of an TE path know what path the advertised Binding SID takes? It's fine to punt this and say "the PCE in the sky will know" - however, I believe SPRING's charter doesn't limit the technology to only centralised computation of paths.
>>
>> I don't believe current demand for this is a good reason to remove it from the protocol specification - it is still somewhat early days for folks deploying TE based on SR - where I think the Binding SID concept is most important.
>>
>> r.
>>
>> On Mon, 12 Jun 2017 at 05:50 <bruno.decraene@orange.com> wrote:
>> Hello SPRING WG,
>>
>> I'd like to encourage discussion on this thread.
>>
>> The related questions seem to be:
>> - Binding SIDs:
>>          -  Is there any implementation?
>>          - Is it useful?
>>          - Does it need to be specified?
>>
>> - Binding SIDs advertised in IGP:
>>          -  Is there any implementation?
>>           - Is it useful?
>>          - Does it need to be specified?
>>
>> As of today, there seem to be multiple SPRING (related) document that make reference (define/use) to the Binding SIDs. e.g.
>> - architecture https://tools.ietf.org/html/draft-ietf-spring-segment-routing-11#section-3.5.2
>> - MPLS instantiation https://tools.ietf.org/html/draft-ietf-spring-segment-routing-mpls-08#section-2
>> - non-protected paths https://tools.ietf.org/html/draft-litkowski-spring-non-protected-paths-01#section-3.3
>> - SR policies: https://tools.ietf.org/html/draft-filsfils-spring-segment-routing-policy-00#section-7
>>
>>
>> However, it also seems a priori possible to define Binding SIDs and not advertised them in the IGP. (e.g. by keeping them local to the PCE)
>>
>> On a side note, if the Binding SIDs are removed from the IGP, do they need to be removed from the BGP-LS extensions? [+IDR chairs]
>>
>> Thanks,
>> Regards,
>> --Bruno
>>
>>> From: OSPF [mailto:ospf-bounces@ietf.org] On Behalf Of Peter Psenak
>>> Sent: Monday, June 12, 2017 10:18 AM
>>   > To: OSPF WG List; spring@ietf.org; isis-wg@ietf.org
>>   > Cc: draft-ietf-ospf-segment-routing-extensions@ietf.org
>>   > Subject: Re: [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect
>>   > OSPFv3 and IS-IS) - REPLY TO THIS ONE
>>   >
>>   > Hi,
>>   >
>>   > I would like to get some feedback on the usage of the SID/Label Binding TLV.
>>   >
>>   > Is there any implementation that uses SID/Label Binding TLV for
>>   > advertising the SID/Label binding to a FEC as specified in section 6 of
>>   > the draft-ietf-ospf-segment-routing-extensions-16 or section 2.4 of
>>   > draft-ietf-isis-segment-routing-extensions-12?
>>   >
>>   > If not, do we see this as something we want to preserve in the IGP SR
>>   > drafts?
>>   >
>>   > ISIS uses The SID/Label Binding TLV to advertise
>>   > prefixes to SID/Label mappings, which is known to be supported by
>>   > several implementations and that piece needs to be preserved.
>>   >
>>   > thanks,
>>   > Peter
>>   >
>>   > On 09/06/17 19:04 , Peter Psenak wrote:
>>   > > Acee,
>>   > >
>>   > > my question is whether we need the whole section 6 and the SID/Label
>>   > > Binding Sub-TLV that it specifies. In OSPF Binding SID is not used for
>>   > > SRMS advertisement like in ISIS.
>>   > >
>>   > > thanks,
>>   > > Peter
>>   > >
>>   > >
>>   > >
>>   > > On 09/06/17 16:45 , Acee Lindem (acee) wrote:
>>   > >> Corrected IS-IS WG alias â€“ Please reply to this one.
>>   > >> Thanks,
>>   > >> Acee
>>   > >>
>>   > >> From: Acee Lindem <acee@cisco.com <mailto:acee@cisco.com>>
>>   > >> Date: Friday, June 9, 2017 at 10:42 AM
>>   > >> To: OSPF WG List <ospf@ietf.org <mailto:ospf@ietf.org>>,
>>   > >> "spring@ietf.org <mailto:spring@ietf.org>" <spring@ietf.org
>>   > >> <mailto:spring@ietf.org>>, "isis@ietf.org <mailto:isis@ietf.org>"
>>   > >> <isis@ietf.org <mailto:isis@ietf.org>>
>>   > >> Cc: "draft-ietf-ospf-segment-routing-extensions@ietf.org
>>   > >> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>"
>>   > >> <draft-ietf-ospf-segment-routing-extensions@ietf.org
>>   > >> <mailto:draft-ietf-ospf-segment-routing-extensions@ietf.org>>
>>   > >> Subject: OSPFv2 Segment Routing Extensions ERO Extensions (would also
>>   > >> effect OSPFv3 and IS-IS)
>>   > >>
>>   > >>     Hi OSPF, ISIS, and SPRING WGs,
>>   > >>
>>   > >>     As part of the Aliaâ€™s AD review, she uncovered the fact that the ERO
>>   > >>     extensions in 6.1 and 6.2 are specified as far as encoding but are
>>   > >>     not specified as far as usage in any IGP or SPRING document. As
>>   > >>     document shepherd,  my proposal is that they simply be removed since
>>   > >>     they were incorporated as part of a draft merge and it appears that
>>   > >>     no one has implemented them (other than parsing). We could also
>>   > >>     deprecate types (4-8) in the OSPFv2 Extended Prefix LSA Sub-TLV
>>   > >>     registry to delay usage of these code points for some time (or
>>   > >>     indefinitely ;^).
>>   > >>
>>   > >>     Thanks,
>>   > >>     Acee
>>   > >>
>>   > >
>>   > > .
>>   > >
>>   >
>>   > _______________________________________________
>>   > OSPF mailing list
>>   > OSPF@ietf.org
>>   > https://www.ietf.org/mailman/listinfo/ospf
>>
>> _________________________________________________________________________________________________________________________
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From: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>
CC: Rob Shakir <rjs@rob.sh>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-ospf-segment-routing-extensions@ietf.org" <draft-ietf-ospf-segment-routing-extensions@ietf.org>, OSPF WG List <ospf@ietf.org>, "Peter Psenak (ppsenak)" <ppsenak@cisco.com>, "isis-wg@ietf.org" <isis-wg@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>
Thread-Topic: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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Date: Mon, 12 Jun 2017 14:16:36 +0000
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Subject: Re: [spring] [OSPF] OSPFv2 Segment Routing Extensions ERO Extensions (would also effect OSPFv3 and IS-IS) - REPLY TO THIS ONE
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From: "Faisal Iqbal (faiqbal)" <faiqbal@cisco.com>
To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>
CC: "spring@ietf.org" <spring@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "draft-ietf-mpls-spring-lsp-ping@ietf.org" <draft-ietf-mpls-spring-lsp-ping@ietf.org>
Thread-Topic: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping
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Date: Mon, 12 Jun 2017 18:56:38 +0000
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Subject: Re: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping
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Hi Loa,
I'm not aware of any IPR applying to draft-ietf-mpls-spring-lsp-ping.

Regards,
Faisal


-----Original Message-----
From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Loa Andersson
Sent: Monday, June 5, 2017 3:39 AM
To: mpls@ietf.org
Cc: spring@ietf.org; mpls-chairs@ietf.org; draft-ietf-mpls-spring-lsp-ping@=
ietf.org
Subject: [spring] IPR poll on draft-ietf-mpls-spring-lsp-ping

Working Group, authors,

We have started to prepare the the draft-ietf-mpls-spring-lsp-ping for wglc=
, prior to the wglc we need to do an IPR poll.

This mail starts this IPR poll.

Are you aware of any IPR that applies to draft-ietf-mpls-spring-lsp-ping?

If so, has this IPR been disclosed in compliance with IETF IPR rules (see R=
FCs 3979, 4879, 3669 and 5378 for more details).

No IPR disclosures have been submitted directly on draft-ietf-mpls- spring-=
lsp-ping or the individual document it replaced.

If you are listed as a document author or contributor please respond to thi=
s email regardless of whether or not you are aware of any relevant IPR. *Th=
e response needs to be sent to the MPLS WG mailing list.* The document will=
 not advance to the next stage until a response has been received from each=
 author and contributor.

If you are on the MPLS WG email list but are not listed as an author or con=
tributor, then please explicitly respond only if you are aware of any IPR t=
hat has not yet been disclosed in conformance with IETF rules.

Since this document might be of interest for the SPRING wg, it has been cop=
ied to the SPRING wg mailing list.

/Loa
mpls wg co-chair
--=20


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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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : IPv6 SPRING Use Cases
        Authors         : John Brzozowski
                          John Leddy
                          Clarence Filsfils
                          Roberta Maglione
                          Mark Townsley
	Filename        : draft-ietf-spring-ipv6-use-cases-11.txt
	Pages           : 9
	Date            : 2017-06-13

Abstract:
   The Source Packet Routing in Networking (SPRING) architecture
   describes how Segment Routing can be used to steer packets through an
   IPv6 or MPLS network using the source routing paradigm.  This
   document illustrates some use cases for Segment Routing in an IPv6
   only environment.


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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : Segment Routing interworking with LDP
        Authors         : Clarence Filsfils
                          Stefano Previdi
                          Ahmed Bashandy
                          Bruno Decraene
                          Stephane Litkowski
	Filename        : draft-ietf-spring-segment-routing-ldp-interop-08.txt
	Pages           : 20
	Date            : 2017-06-15

Abstract:
   A Segment Routing (SR) node steers a packet through a controlled set
   of instructions, called segments, by prepending the packet with an SR
   header.  A segment can represent any instruction, topological or
   service-based.  SR allows to enforce a flow through any topological
   path and service chain while maintaining per-flow state only at the
   ingress node to the SR domain.

   The Segment Routing architecture can be directly applied to the MPLS
   data plane with no change in the forwarding plane.  This drafts
   describes how Segment Routing operates in a network where LDP is
   deployed and in the case where SR-capable and non-SR-capable nodes
   coexist.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-ldp-interop/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-ldp-interop-08
https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-routing-ldp-interop-08

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-segment-routing-ldp-interop-08


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

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From: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
To: SPRING WG <spring@ietf.org>
Thread-Topic: I-D Action: draft-ietf-spring-segment-routing-ldp-interop-08.txt
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in this version we have better introduced the concept of the SRMS that is t=
hen referenced by routing protocol extensions drafts.

thanks.
s.


> On Jun 16, 2017, at 12:19 AM, internet-drafts@ietf.org wrote:
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts direct=
ories.
> This draft is a work item of the Source Packet Routing in Networking of t=
he IETF.
>=20
>        Title           : Segment Routing interworking with LDP
>        Authors         : Clarence Filsfils
>                          Stefano Previdi
>                          Ahmed Bashandy
>                          Bruno Decraene
>                          Stephane Litkowski
> 	Filename        : draft-ietf-spring-segment-routing-ldp-interop-08.txt
> 	Pages           : 20
> 	Date            : 2017-06-15
>=20
> Abstract:
>   A Segment Routing (SR) node steers a packet through a controlled set
>   of instructions, called segments, by prepending the packet with an SR
>   header.  A segment can represent any instruction, topological or
>   service-based.  SR allows to enforce a flow through any topological
>   path and service chain while maintaining per-flow state only at the
>   ingress node to the SR domain.
>=20
>   The Segment Routing architecture can be directly applied to the MPLS
>   data plane with no change in the forwarding plane.  This drafts
>   describes how Segment Routing operates in a network where LDP is
>   deployed and in the case where SR-capable and non-SR-capable nodes
>   coexist.
>=20
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-ldp-in=
terop/
>=20
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-spring-segment-routing-ldp-interop=
-08
> https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-routing-l=
dp-interop-08
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-spring-segment-routing-ldp=
-interop-08
>=20
>=20
> Please note that it may take a couple of minutes from the time of submiss=
ion
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
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> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


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--_000_D7B01D289E25486095A59032008F4BD7ciscocom_--


From nobody Fri Jun 16 08:34:41 2017
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Subject: [spring] Last Call: <draft-ietf-spring-oam-usecase-06.txt> (A Scalable and Topology-Aware MPLS Dataplane Monitoring System) to Informational RFC
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The IESG has received a request from the Source Packet Routing in Networking
WG (spring) to consider the following document: - 'A Scalable and
Topology-Aware MPLS Dataplane Monitoring System'
  <draft-ietf-spring-oam-usecase-06.txt> as Informational RFC

The IESG plans to make a decision in the next few weeks, and solicits final
comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2017-06-30. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the beginning of
the Subject line to allow automated sorting.

Abstract


   This document describes features of a path monitoring system and
   related use cases.  Segment based routing enables a scalable and
   simple method to monitor data plane liveliness of the complete set of
   paths belonging to a single domain.  The MPLS monitoring system adds
   features to the traditional MPLS ping and LSP path trace, in a very
   complementary way.  MPLS topology awareness reduces management and
   control plane involvement of OAM measurements while enabling new OAM
   features.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-spring-oam-usecase/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-spring-oam-usecase/ballot/

The following IPR Declarations may be related to this I-D:

   https://datatracker.ietf.org/ipr/2314/
   https://datatracker.ietf.org/ipr/2406/






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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 19 Jun 2017 23:21:22 -0500
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Subject: [spring] Fwd: New Version Notification for draft-mirsky-bfd-mpls-demand-00.txt
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--001a113d2ecc916e5405525c95be
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Dear All,
I think this new draft may be of interest. Looking forward to your
comments, questions.

Regards,
Greg

---------- Forwarded message ----------
From: <internet-drafts@ietf.org>
Date: Mon, Jun 19, 2017 at 6:42 PM
Subject: New Version Notification for draft-mirsky-bfd-mpls-demand-00.txt
To: Gregory Mirsky <gregimirsky@gmail.com>



A new version of I-D, draft-mirsky-bfd-mpls-demand-00.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:           draft-mirsky-bfd-mpls-demand
Revision:       00
Title:          BFD in Demand Mode over Point-to-Point MPLS LSP
Document date:  2017-06-19
Group:          Individual Submission
Pages:          5
URL:            https://www.ietf.org/internet-drafts/draft-mirsky-bfd-mpls-
demand-00.txt
Status:         https://datatracker.ietf.org/doc/draft-mirsky-bfd-mpls-
demand/
Htmlized:       https://tools.ietf.org/html/draft-mirsky-bfd-mpls-demand-00
Htmlized:       https://datatracker.ietf.org/doc/html/draft-mirsky-bfd-
mpls-demand-00


Abstract:
   This document describes procedures for using Bidirectional Forwarding
   Detection (BFD) in Demand mode to detect data plane failures in
   Multiprotocol Label Switching (MPLS) point-to-point Label Switched
   Paths.




Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat

--001a113d2ecc916e5405525c95be
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<div dir=3D"ltr">Dear All,<div>I think this new draft may be of interest. L=
ooking forward to your comments, questions.</div><div><br></div><div>Regard=
s,</div><div>Greg</div><div><br><div class=3D"gmail_quote">---------- Forwa=
rded message ----------<br>From: <b class=3D"gmail_sendername"></b> <span d=
ir=3D"ltr">&lt;<a href=3D"mailto:internet-drafts@ietf.org">internet-drafts@=
ietf.org</a>&gt;</span><br>Date: Mon, Jun 19, 2017 at 6:42 PM<br>Subject: N=
ew Version Notification for draft-mirsky-bfd-mpls-demand-00.txt<br>To: Greg=
ory Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.c=
om</a>&gt;<br><br><br><br>
A new version of I-D, draft-mirsky-bfd-mpls-demand-<wbr>00.txt<br>
has been successfully submitted by Greg Mirsky and posted to the<br>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-bfd-mpls-demand<=
br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A000<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BFD in Demand Mode over Point-to-P=
oint MPLS LSP<br>
Document date:=C2=A0 2017-06-19<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 5<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/internet-drafts/draft-mirsky-bfd-mpls-demand-00.txt" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/internet-<wbr>drafts/draft-mirsky-bf=
d-mpls-<wbr>demand-00.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-mirsky-bfd-mpls-demand/" rel=3D"noreferrer" target=3D"_blan=
k">https://datatracker.ietf.org/<wbr>doc/draft-mirsky-bfd-mpls-<wbr>demand/=
</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/=
draft-mirsky-bfd-mpls-demand-00" rel=3D"noreferrer" target=3D"_blank">https=
://tools.ietf.org/html/<wbr>draft-mirsky-bfd-mpls-demand-<wbr>00</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org=
/doc/html/draft-mirsky-bfd-mpls-demand-00" rel=3D"noreferrer" target=3D"_bl=
ank">https://datatracker.ietf.org/<wbr>doc/html/draft-mirsky-bfd-<wbr>mpls-=
demand-00</a><br>
<br>
<br>
Abstract:<br>
=C2=A0 =C2=A0This document describes procedures for using Bidirectional For=
warding<br>
=C2=A0 =C2=A0Detection (BFD) in Demand mode to detect data plane failures i=
n<br>
=C2=A0 =C2=A0Multiprotocol Label Switching (MPLS) point-to-point Label Swit=
ched<br>
=C2=A0 =C2=A0Paths.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br>
</div><br></div></div>

--001a113d2ecc916e5405525c95be--


From nobody Tue Jun 20 11:04:58 2017
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Subject: [spring] I-D Action: draft-ietf-spring-segment-routing-mpls-09.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : Segment Routing with MPLS data plane
        Authors         : Clarence Filsfils
                          Stefano Previdi
                          Ahmed Bashandy
                          Bruno Decraene
                          Stephane Litkowski
                          Rob Shakir
	Filename        : draft-ietf-spring-segment-routing-mpls-09.txt
	Pages           : 11
	Date            : 2017-06-20

Abstract:
   Segment Routing (SR) leverages the source routing paradigm.  A node
   steers a packet through a controlled set of instructions, called
   segments, by prepending the packet with an SR header.  In the MPLS
   dataplane, the SR header is instantiated through a label stack.  A
   segment can represent any instruction, topological or service-based.
   Additional segments can be defined in the future.  SR allows to
   enforce a flow through any topological path and/or service chain
   while maintaining per-flow state only at the ingress node to the SR
   domain.

   Segment Routing can be directly applied to the MPLS architecture with
   no change in the forwarding plane.  This drafts describes how Segment
   Routing operates on top of the MPLS data plane.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-mpls/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-mpls-09
https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-routing-mpls-09

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-segment-routing-mpls-09


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Subject: [spring] I-D Action: draft-filsfils-spring-sr-recursing-info-05.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : Segment Routing Recursive Information
        Authors         : Clarence Filsfils
                          Stefano Previdi
                          Peter Psenak
                          Les Ginsberg
	Filename        : draft-filsfils-spring-sr-recursing-info-05.txt
	Pages           : 8
	Date            : 2017-06-20

Abstract:
   Segment Routing (SR) allows for a flexible definition of end-to-end
   paths within IGP topologies by encoding paths as sequences of
   topological sub-paths, called "segments".  These segments are
   advertised by the link-state routing protocols (IS-IS and OSPF).

   There are use cases where it is desirable to utilize a SID associated
   with a given node in order to transport traffic destined to different
   local services supported by such node.  This document defines the
   mechanism to do so and illustrates it.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-filsfils-spring-sr-recursing-info/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-filsfils-spring-sr-recursing-info-05
https://datatracker.ietf.org/doc/html/draft-filsfils-spring-sr-recursing-info-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-filsfils-spring-sr-recursing-info-05


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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : Segment Routing Centralized BGP Egress Peer Engineering
        Authors         : Clarence Filsfils
                          Stefano Previdi
                          Ebben Aries
                          Dmitry Afanasiev
	Filename        : draft-ietf-spring-segment-routing-central-epe-06.txt
	Pages           : 19
	Date            : 2017-06-20

Abstract:
   Segment Routing (SR) leverages source routing.  A node steers a
   packet through a controlled set of instructions, called segments, by
   prepending the packet with an SR header.  A segment can represent any
   instruction topological or service-based.  SR allows to enforce a
   flow through any topological path and service chain while maintaining
   per-flow state only at the ingress node of the SR domain.

   The Segment Routing architecture can be directly applied to the MPLS
   dataplane with no change on the forwarding plane.  It requires a
   minor extension to the existing link-state routing protocols.

   This document illustrates the application of Segment Routing to solve
   the BGP Egress Peer Engineering (BGP-EPE) requirement.  The SR-based
   BGP-EPE solution allows a centralized (Software Defined Network, SDN)
   controller to program any egress peer policy at ingress border
   routers or at hosts within the domain.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-central-epe/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-central-epe-06
https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-routing-central-epe-06

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-segment-routing-central-epe-06


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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : BGP-Prefix Segment in large-scale data centers
        Authors         : Clarence Filsfils
                          Stefano Previdi
                          Jon Mitchell
                          Ebben Aries
                          Petr Lapukhov
	Filename        : draft-ietf-spring-segment-routing-msdc-05.txt
	Pages           : 25
	Date            : 2017-06-20

Abstract:
   This document describes the motivation and benefits for applying
   segment routing in BGP-based large-scale data-centers.  It describes
   the design to deploy segment routing in those data-centers, for both
   the MPLS and IPv6 dataplanes.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-msdc/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-msdc-05
https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-routing-msdc-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-segment-routing-msdc-05


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Subject: [spring] I-D Action: draft-ietf-spring-segment-routing-12.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : Segment Routing Architecture
        Authors         : Clarence Filsfils
                          Stefano Previdi
                          Bruno Decraene
                          Stephane Litkowski
                          Rob Shakir
	Filename        : draft-ietf-spring-segment-routing-12.txt
	Pages           : 28
	Date            : 2017-06-20

Abstract:
   Segment Routing (SR) leverages the source routing paradigm.  A node
   steers a packet through an ordered list of instructions, called
   segments.  A segment can represent any instruction, topological or
   service-based.  A segment can have a semantic local to an SR node or
   global within an SR domain.  SR allows to enforce a flow through any
   topological path and service chain while maintaining per-flow state
   only at the ingress nodes to the SR domain.

   Segment Routing can be directly applied to the MPLS architecture with
   no change on the forwarding plane.  A segment is encoded as an MPLS
   label.  An ordered list of segments is encoded as a stack of labels.
   The segment to process is on the top of the stack.  Upon completion
   of a segment, the related label is popped from the stack.

   Segment Routing can be applied to the IPv6 architecture, with a new
   type of routing header.  A segment is encoded as an IPv6 address.  An
   ordered list of segments is encoded as an ordered list of IPv6
   addresses in the routing header.  The active segment is indicated by
   the Destination Address of the packet.  The next active segment is
   indicated by a pointer in the new routing header.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-12
https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-routing-12

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-segment-routing-12


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Subject: [spring] No session in Prague
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WG,

Bruno and I have discussed. Considering that the bulk of the WG 
documents had been sent to IESG in March and that the current items 
under focus can progress via exchanges on the list we have decided not 
to request a slot in Prague.
As such there won't be a SPRING meeting in Prague.

martin


From nobody Thu Jun 22 06:29:37 2017
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Subject: [spring] Rtgdir last call review of draft-ietf-spring-oam-usecase-06
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Reviewer: Joel Halpern
Review result: Has Nits

This is a rtg-dir requested review.

Summary: Ready for publication as an Informational RFC with some minor items
that should be considered.

Major: N/A

Minor:
    The introduction treats having a single centralized monitoring system as an
    unalloyed positive.  To set context properly, it would seem more
    appropriate to note that many operators find such central systems useful,
    and the approach described here enables that when desired.

    The reference in the introduction to IGP topology discovery is very
    confusing. "Adding MPLS topology awareness to an IGP speaking device hence
    enables a simple and scalable data plane based monitoring mechanism."  As
    noted later in the document, link-state IGPs provide topology awareness. 
    So what is this part of the introduction trying to say?  (Side-note, not
    all IGPs are link state, although the applicability of Babel or RIP to MPLS
    Segment Routing is clearly outside the scope of this document.)

    In section 5.1 in discussing path trace the reference is to RFC 4379 which
    is a clear source for path trace.  However, the text refers to "tree
    trace".  While that may have become a common phrase for the usage, it is
    not used in RFC 4379.  The term should either be explain, include a
    suitable reference, or not be used.

   In section 5.3 on fault isolation, the text notes that the only difference
   between the test which succeeds and that which fails is the difference the
   the adjacency SID.  The text then goes on to say "Assuming the second probe
   has been routed correctly, the fault must have been occurring in R2 which
   didn't forward the packet to the interface identified by its Adjacency SID
   663."  That does not follow.  If the link as failed in an undetected fashion
   (either in one direction or both), R2 would be functioning fine and the
   symptom would be the same.  Remotely detecting the difference between R2
   failing to forward and the link not working seems a much harder task.

    The claim that the PMS can / should (intent is ambiguous) notify the router
    when it detects a path failure raises a number of issues.   It is not at
    all clear what the router would do with the notification.  (e.g. If it
    removed the link from service, then future monitoring would not be able to
    detect that the link was working.)  Either this needs to become a
    significantly larger section, or (more likely) the text needs to be removed.

Editorial:
    Chapter 7 is titled dealing with non-SR environments.  Which makes sense. 
    The text then switches to using "pre-SR" instead of "non-SR".  I would
    recommend that all uses of "pre-SR" be changed to "non-SR".


From nobody Thu Jun 22 23:22:27 2017
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Subject: [spring] I-D Action: draft-ietf-spring-segment-routing-mpls-10.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking of the IETF.

        Title           : Segment Routing with MPLS data plane
        Authors         : Clarence Filsfils
                          Stefano Previdi
                          Ahmed Bashandy
                          Bruno Decraene
                          Stephane Litkowski
                          Rob Shakir
	Filename        : draft-ietf-spring-segment-routing-mpls-10.txt
	Pages           : 11
	Date            : 2017-06-22

Abstract:
   Segment Routing (SR) leverages the source routing paradigm.  A node
   steers a packet through a controlled set of instructions, called
   segments, by prepending the packet with an SR header.  In the MPLS
   dataplane, the SR header is instantiated through a label stack.  A
   segment can represent any instruction, topological or service-based.
   Additional segments can be defined in the future.  SR allows to
   enforce a flow through any topological path and/or service chain
   while maintaining per-flow state only at the ingress node to the SR
   domain.

   Segment Routing can be directly applied to the MPLS architecture with
   no change in the forwarding plane.  This drafts describes how Segment
   Routing operates on top of the MPLS data plane.



The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-mpls/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-mpls-10
https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-routing-mpls-10

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-segment-routing-mpls-10


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Sun Jun 25 23:52:39 2017
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From: <Ruediger.Geib@telekom.de>
To: <aretana@cisco.com>
CC: <spring-chairs@ietf.org>, <bruno.decraene@orange.com>, <spring@ietf.org>,  <draft-ietf-spring-oam-usecase@ietf.org>
Thread-Topic: AD Review of draft-ietf-spring-oam-usecase-06
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Date: Mon, 26 Jun 2017 06:52:23 +0000
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--_000_f8fb40286a044a38b79699806a118e49HE101653emea1cdstintern_--


From nobody Wed Jun 28 11:31:42 2017
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From: Pete Resnick <presnick@qti.qualcomm.com>
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Subject: [spring] Genart last call review of draft-ietf-spring-oam-usecase-06
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Reviewer: Pete Resnick
Review result: Not Ready

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at

<https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.

Document: draft-ietf-spring-oam-usecase-06
Reviewer: Pete Resnick
Review Date: 2017-06-28
IETF LC End Date: 2017-06-30
IESG Telechat date: Not scheduled for a telechat

Summary: Not Ready for publication as Informational, but might be Ready for
publication as Proposed Standard

Major issues:

This is an admittedly unusual review. I have read through the entire document,
and the technical work seems fine, but is well beyond my technical expertise,
so I can't really comment on the technical correctness. However, it is
absolutely clear to me that this is *not* a "use case" document at all and I
don't think it's appropriate as an Informational document. This is clearly a
*specification* of a path monitoring system. It gives guidances as to required,
recommended, and optional parameters, and specifies how to use different
protocol pieces. It is at the very least what RFC 2026 refers to as an
"Applicability Statement (AS)" (see RFC 2026, sec. 3.2). It *might* be a BCP,
but it is not strictly giving "common guidelines for policies and operations"
(2026, sec. 5), so I don't really think that's right, and instead this should
be offered for Proposed Standard. Either way, I think Informational is not
correct. Importantly, I think there is a good likelihood that this document has
not received the appropriate amount of review; people tend to ignore
Informational "use case" documents, and there have been no Last Call comments
beyond Joel's RTG Area Review. Even in IESG review, an Informational document
only takes the sponsoring AD to approve; every other AD can summarily ignore
the document, or even ballot ABSTAIN, and the document will still be published
(though that does not normally happen). This document should have much more
than that level of review. I strongly recommend to the WG and AD that this
document be withdrawn as an Informational document and resubmitted for Proposed
Standard and have that level of review and scrutiny applied to it.

Minor issues:

None.

Nits/editorial comments:

This document refers to RFC 4379, which has been obsoleted by RFC 8029. It
seems like the references should be updated.



From nobody Wed Jun 28 12:10:46 2017
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--94eb2c115c10b9ba0b055309f00a
Content-Type: text/plain; charset="UTF-8"

Dear All,
the update addresses comment from Mankamana Mishra.
The draft discusses use of BFD in Demand mode over p2p MPLS LSP.
Your comments, questions, and suggestions are always welcome and greatly
appreciated.

Regards,
Greg

---------- Forwarded message ----------
From: <internet-drafts@ietf.org>
Date: Wed, Jun 28, 2017 at 12:05 PM
Subject: New Version Notification for draft-mirsky-bfd-mpls-demand-01.txt
To: Gregory Mirsky <gregimirsky@gmail.com>



A new version of I-D, draft-mirsky-bfd-mpls-demand-01.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:           draft-mirsky-bfd-mpls-demand
Revision:       01
Title:          BFD in Demand Mode over Point-to-Point MPLS LSP
Document date:  2017-06-28
Group:          Individual Submission
Pages:          5
URL:            https://www.ietf.org/internet-drafts/draft-mirsky-bfd-mpls-d
emand-01.txt
Status:         https://datatracker.ietf.org/doc/draft-mirsky-bfd-mpls-dema
nd/
Htmlized:       https://tools.ietf.org/html/draft-mirsky-bfd-mpls-demand-01
Htmlized:       https://datatracker.ietf.org/doc/html/draft-mirsky-bfd-mpls
-demand-01
Diff:           https://www.ietf.org/rfcdiff?url2=draft-mirsky-bfd-mpls-dem
and-01

Abstract:
   This document describes procedures for using Bidirectional Forwarding
   Detection (BFD) in Demand mode to detect data plane failures in
   Multiprotocol Label Switching (MPLS) point-to-point Label Switched
   Paths.




Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat

--94eb2c115c10b9ba0b055309f00a
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr">Dear All,<div>the update addresses comment from Mankamana =
Mishra.</div><div>The draft discusses use of BFD in Demand mode over p2p MP=
LS LSP.</div><div>Your comments, questions, and suggestions are always welc=
ome and greatly appreciated.</div><div><br></div><div>Regards,</div><div>Gr=
eg</div><div><br><div class=3D"gmail_quote">---------- Forwarded message --=
--------<br>From: <b class=3D"gmail_sendername"></b> <span dir=3D"ltr">&lt;=
<a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">internet-draf=
ts@ietf.org</a>&gt;</span><br>Date: Wed, Jun 28, 2017 at 12:05 PM<br>Subjec=
t: New Version Notification for draft-mirsky-bfd-mpls-demand-<wbr>01.txt<br=
>To: Gregory Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com" target=3D"=
_blank">gregimirsky@gmail.com</a>&gt;<br><br><br><br>
A new version of I-D, draft-mirsky-bfd-mpls-demand-0<wbr>1.txt<br>
has been successfully submitted by Greg Mirsky and posted to the<br>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-bfd-mpls-demand<=
br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A001<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 BFD in Demand Mode over Point-to-P=
oint MPLS LSP<br>
Document date:=C2=A0 2017-06-28<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 5<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/internet-drafts/draft-mirsky-bfd-mpls-demand-01.txt" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/internet-<wbr>drafts/draft-mirsky-bf=
d-mpls-d<wbr>emand-01.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-mirsky-bfd-mpls-demand/" rel=3D"noreferrer" target=3D"_blan=
k">https://datatracker.ietf.org/<wbr>doc/draft-mirsky-bfd-mpls-dema<wbr>nd/=
</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/=
draft-mirsky-bfd-mpls-demand-01" rel=3D"noreferrer" target=3D"_blank">https=
://tools.ietf.org/html/d<wbr>raft-mirsky-bfd-mpls-demand-01</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org=
/doc/html/draft-mirsky-bfd-mpls-demand-01" rel=3D"noreferrer" target=3D"_bl=
ank">https://datatracker.ietf.org/<wbr>doc/html/draft-mirsky-bfd-mpls<wbr>-=
demand-01</a><br>
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.o=
rg/rfcdiff?url2=3Ddraft-mirsky-bfd-mpls-demand-01" rel=3D"noreferrer" targe=
t=3D"_blank">https://www.ietf.org/rfcdiff?<wbr>url2=3Ddraft-mirsky-bfd-mpls=
-dem<wbr>and-01</a><br>
<br>
Abstract:<br>
=C2=A0 =C2=A0This document describes procedures for using Bidirectional For=
warding<br>
=C2=A0 =C2=A0Detection (BFD) in Demand mode to detect data plane failures i=
n<br>
=C2=A0 =C2=A0Multiprotocol Label Switching (MPLS) point-to-point Label Swit=
ched<br>
=C2=A0 =C2=A0Paths.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br>
</div><br></div></div>

--94eb2c115c10b9ba0b055309f00a--


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From: <Ruediger.Geib@telekom.de>
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CC: <spring@ietf.org>, <ietf@ietf.org>, <draft-ietf-spring-oam-usecase.all@ietf.org>, <rtg-dir@ietf.org>
Thread-Topic: Rtgdir last call review of draft-ietf-spring-oam-usecase-06
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Date: Thu, 29 Jun 2017 07:33:00 +0000
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Subject: Re: [spring] Rtgdir last call review of draft-ietf-spring-oam-usecase-06
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From: Martin Vigoureux <martin.vigoureux@nokia.com>
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Subject: [spring] WG Last Call for draft-ietf-spring-conflict-resolution
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Hello Working Group,

This email starts a Working Group Last Call on 
draft-ietf-spring-conflict-resolution-04 [1] which is considered mature 
and ready for a final working group review.

¤ Please read this document if you haven't read the most recent
version yet, and send your comments to the list, no later than
*21st of July*.
Note that this is *not only* a call for comments on the document; it is 
also a call for support (or not) to publish this document as a Proposed 
Standard RFC.

¤ *Coincidentally*, we are also polling for knowledge of any IPR that 
applies to draft-ietf-spring-conflict-resolution, to ensure that IPR has 
been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879, 
3669 and 5378 for more details).

If you are listed as an Author or Contributor of
draft-ietf-spring-conflict-resolution-04 please respond to this email 
and indicate whether or not you are aware of any relevant IPR.

Note that, as of today, no IPR has been disclosed against this document 
or its earlier versions.

Thank you,
Martin

[1] https://datatracker.ietf.org/doc/draft-ietf-spring-conflict-resolution/


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From: Pete Resnick <presnick@qti.qualcomm.com>
To: <Ruediger.Geib@telekom.de>
CC: <spring@ietf.org>, <ietf@ietf.org>, <draft-ietf-spring-oam-usecase.all@ietf.org>, <gen-art@ietf.org>
Date: Thu, 29 Jun 2017 10:18:17 -0500
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Subject: Re: [spring] Genart last call review of draft-ietf-spring-oam-usecase-06
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On 29 Jun 2017, at 2:28, Ruediger.Geib@telekom.de wrote:

> Hi Pete,
>
> thanks for proposing to make this an Applicability Statement, BCP or 
> standard.
>
> I don't object, but if the status of this draft is supposed to be 
> changed, my chairs and AD need to support this. Bruno and Alvaro, 
> what's your view on Pete's proposal? We may have to invest some more 
> time and text then. I personally don't object to "informational" as an 
> aim, but if that means removing major parts of the content, I'd be 
> rather unhappy.

Thanks for considering this. IMO, I don't see why doing this as PS would 
require removing anything; lots of PSs have informational content in 
them.

> Pete, also Alvaro gave us a routing AD review on Friday, 16. June (and 
> he had comments). Bruno's shephard review as part of the WG Last Call 
> resulted in better structuring and definitions in the document. So 
> far, no AD or reviewer "tends to ignore [this] Informational "use 
> case" document". Youâ€™re the third AD to comment and ask for changes 
> (and I recall to have had serious AD and IESG reviews with other 
> informationals).

Oh, I didn't mean to say that serious reviews of Informational docs 
didn't happen; it quite often does. But the bar is lower, and I know for 
myself (both as a participant and as an AD) that sometimes I would skip 
reading a particular document because I had run out of time and "it was 
only going for Informational", or see something that I didn't like in a 
Informational document and say, "Well, it's only going for 
Informational, so I'm not going to cause too much of a fuss". For a 
document that is actually a consensus specification of an IETF WG, that 
shouldn't be allowed to happen; everybody should be aware that this 
document should get the full scrutiny of a standards-track document.

> Regards,
>
> Ruediger

Cheers,

pr

> -----UrsprÃ¼ngliche Nachricht-----
> Von: Pete Resnick [mailto:presnick@qti.qualcomm.com]
> Gesendet: Mittwoch, 28. Juni 2017 20:31
> An: gen-art@ietf.org
> Cc: spring@ietf.org; ietf@ietf.org; 
> draft-ietf-spring-oam-usecase.all@ietf.org
> Betreff: Genart last call review of draft-ietf-spring-oam-usecase-06
>
> Reviewer: Pete Resnick
> Review result: Not Ready
>
> I am the assigned Gen-ART reviewer for this draft. The General Area 
> Review Team (Gen-ART) reviews all IETF documents being processed by 
> the IESG for the IETF Chair.  Please treat these comments just like 
> any other last call comments.
>
> For more information, please see the FAQ at
>
> <https://trac.ietf.org/trac/gen/wiki/GenArtfaq>.
>
> Document: draft-ietf-spring-oam-usecase-06
> Reviewer: Pete Resnick
> Review Date: 2017-06-28
> IETF LC End Date: 2017-06-30
> IESG Telechat date: Not scheduled for a telechat
>
> Summary: Not Ready for publication as Informational, but might be 
> Ready for publication as Proposed Standard
>
> Major issues:
>
> This is an admittedly unusual review. I have read through the entire 
> document, and the technical work seems fine, but is well beyond my 
> technical expertise, so I can't really comment on the technical 
> correctness. However, it is absolutely clear to me that this is *not* 
> a "use case" document at all and I don't think it's appropriate as an 
> Informational document. This is clearly a
> *specification* of a path monitoring system. It gives guidances as to 
> required, recommended, and optional parameters, and specifies how to 
> use different protocol pieces. It is at the very least what RFC 2026 
> refers to as an "Applicability Statement (AS)" (see RFC 2026, sec. 
> 3.2). It *might* be a BCP, but it is not strictly giving "common 
> guidelines for policies and operations"
> (2026, sec. 5), so I don't really think that's right, and instead this 
> should be offered for Proposed Standard. Either way, I think 
> Informational is not correct. Importantly, I think there is a good 
> likelihood that this document has not received the appropriate amount 
> of review; people tend to ignore Informational "use case" documents, 
> and there have been no Last Call comments beyond Joel's RTG Area 
> Review. Even in IESG review, an Informational document only takes the 
> sponsoring AD to approve; every other AD can summarily ignore the 
> document, or even ballot ABSTAIN, and the document will still be 
> published (though that does not normally happen). This document should 
> have much more than that level of review. I strongly recommend to the 
> WG and AD that this document be withdrawn as an Informational document 
> and resubmitted for Proposed Standard and have that level of review 
> and scrutiny applied to it.
>
> Minor issues:
>
> None.
>
> Nits/editorial comments:
>
> This document refers to RFC 4379, which has been obsoleted by RFC 
> 8029. It seems like the references should be updated.


-- 
Pete Resnick <http://www.qualcomm.com/~presnick/>
Qualcomm Technologies, Inc. - +1 (858)651-4478


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Date: Thu, 29 Jun 2017 10:56:24 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Martin Vigoureux <martin.vigoureux@nokia.com>, <spring@ietf.org>
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yes/support

=20
Cheers,
Jeff
=20

On 6/29/17, 06:28, "spring on behalf of Martin Vigoureux" <spring-bounces@i=
etf.org on behalf of martin.vigoureux@nokia.com> wrote:

    Hello Working Group,
   =20
    This email starts a Working Group Last Call on=20
    draft-ietf-spring-conflict-resolution-04 [1] which is considered mature=
=20
    and ready for a final working group review.
   =20
    =C2=A4 Please read this document if you haven't read the most recent
    version yet, and send your comments to the list, no later than
    *21st of July*.
    Note that this is *not only* a call for comments on the document; it is=
=20
    also a call for support (or not) to publish this document as a Proposed=
=20
    Standard RFC.
   =20
    =C2=A4 *Coincidentally*, we are also polling for knowledge of any IPR that=20
    applies to draft-ietf-spring-conflict-resolution, to ensure that IPR ha=
s=20
    been disclosed in compliance with IETF IPR rules (see RFCs 3979, 4879,=20
    3669 and 5378 for more details).
   =20
    If you are listed as an Author or Contributor of
    draft-ietf-spring-conflict-resolution-04 please respond to this email=20
    and indicate whether or not you are aware of any relevant IPR.
   =20
    Note that, as of today, no IPR has been disclosed against this document=
=20
    or its earlier versions.
   =20
    Thank you,
    Martin
   =20
    [1] https://datatracker.ietf.org/doc/draft-ietf-spring-conflict-resolut=
ion/
   =20
    _______________________________________________
    spring mailing list
    spring@ietf.org
    https://www.ietf.org/mailman/listinfo/spring
   =20



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Thread-Topic: AD Review of draft-ietf-spring-oam-usecase-06
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Date: Fri, 30 Jun 2017 13:08:23 +0000
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From nobody Fri Jun 30 07:13:49 2017
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From: Joel Jaeggli <joelja@bogus.com>
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Subject: [spring] Opsdir last call review of draft-ietf-spring-oam-usecase-06
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Reviewer: Joel Jaeggli
Review result: Has Nits

I have reviewed

draft-ietf-spring-oam-usecase-06 as par of the OPS directorate review cycle
forIETF last call.

In general I think this document is ready to go however I have a couple of
concerns that should probably at least be discussed prior to IESG review.

>From my vantage point the document is not so much a description of a use case
or requirements as it is the architectural wrapper around
draft-ietf-mpls-spring-lsp-ping. It's most helpful in my opinion to review this
one as though the other one was the companion document, from this vantage point
I think the later document is effectively normatively referenced. Similarly the
readiness of the later document (which is a bit earlier in it's lifecycle)
raises the question of whether this one is ready to go.

in the security considerations section the document notes:

   As mentioned in the introduction, a PMS monitoring packet should
   never leave the domain where it originated.  It therefore should
   never use stale MPLS or IGP routing information.

I think is is more accurate to say:

Use of stale MPLS or IGP routing information could cause a PMS monitoring
packet to leave the domain where it originated. PMS monitoring packets should
not be sent using stale MPLS or IGP routing information.

As it is necessary to know that the information is stale is order to follow the
instruction, as is the case with for example convergence events that may be
ongoing at the time of diagnostic measurement.


