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Subject: [Diffserv] RE: Applications broken by diff-sev remarking?
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> Dear diff-serv community,
> 
> I seem to recall that in the very early days of diff-serv, there was some
> kind of survey to establish whether there were any applications that would
> be broken if the TOS value (i.e. pre diff-serv days) was changed to any
> value other than the transmitted value.
> 
> Is there a list of applications known to show problems with remapping of
> TOS values, and which could therefore be considered "Non diff-serv
> compliant"?
> 
> Any answers most appreciated,
> 
> Simon
> 
> -----------------------------------------------------------------
> Simon Carter 
> IP Network Engineering, BTexact Technologies
> MLB G pp8, Adastral Park, Martlesham Heath,
> Ipswich, IP5 3RE, UK
> simon.f.carter@bt.com
> Tel:	 +44 1473 606360
> Fax:	 +44 1473 606727
> -----------------------------------------------------------------
> 

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From daemon@ns.ietf.org  Wed May 15 12:01:26 2002
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Date: Wed, 15 May 2002 17:33:54 +0200
From: Brian E Carpenter <brian@hursley.ibm.com>
Organization: IBM
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CC: diffserv@ietf.org
Subject: Re: [Diffserv] RE: Applications broken by diff-sev remarking?
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The problem we identified was a very small number of TCP implementations
that failed if the TOS byte is changed on the return packets. I don't recall
any application dependencies (although of course anything is possible).

   Brian

simon.f.carter@bt.com wrote:
> 
> > Dear diff-serv community,
> >
> > I seem to recall that in the very early days of diff-serv, there was some
> > kind of survey to establish whether there were any applications that would
> > be broken if the TOS value (i.e. pre diff-serv days) was changed to any
> > value other than the transmitted value.
> >
> > Is there a list of applications known to show problems with remapping of
> > TOS values, and which could therefore be considered "Non diff-serv
> > compliant"?
> >
> > Any answers most appreciated,
> >
> > Simon
> >
> > -----------------------------------------------------------------
> > Simon Carter
> > IP Network Engineering, BTexact Technologies
> > MLB G pp8, Adastral Park, Martlesham Heath,
> > Ipswich, IP5 3RE, UK
> > simon.f.carter@bt.com
> > Tel:   +44 1473 606360
> > Fax:   +44 1473 606727
> > -----------------------------------------------------------------
> >
>

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From daemon@optimus.ietf.org  Thu May 16 04:52:27 2002
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Organization: IBM
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Subscribers to the diffserv list might be interested to know 
on an average day, we intercept about ten undesirable messages
to the list, mostly pure spam, but including two or three copies
of the Klez virus. I suspect that one or several people who
are subscribed to this list may be infected with Klez, so I
recommend everybody who uses Windows to check that their virus 
protection is up to date.

   Brian

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From daemon@optimus.ietf.org  Thu May 16 06:09:58 2002
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hi:)
	can i ask you a question?
	i am doubted about the QOS routing.
	my view is:
	the object of QOS routing is to meet the strict QOS constrain of per-flow,is it right?
	it just fit  the model of guarantee service in Intserv,but as we know ,the Interv has the Scalability problem,
	and now we are interesting in the research of Diffserv model.but in the Differv,flows are aggregated in a PHB unit,
	so how can we guarantee the per-flow QOS in this aggregated model?  e.g the end to end delay is a cumulative QOS parameter,when we queue aggregated flows in the same queue in the router,how can we determine the delay bound in this router for each flow packets?
	so how can we use QOS routing in the Diffserv model?
	
	thank you very much:)


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Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



From daemon@optimus.ietf.org  Thu May 16 07:33:43 2002
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The diffserv architecture does not guarantee anything per flow.
All it offers is statistical constraints on a complete traffic
aggregate. This applies with or without QOS routing.

Please continue this discussion on the diffserv-interest list.
See http://www1.ietf.org/mailman/listinfo/diffserv-interest

   Brian Carpenter

hchang wrote:
> 
> hi:)
>         can i ask you a question?
>         i am doubted about the QOS routing.
>         my view is:
>         the object of QOS routing is to meet the strict QOS constrain of per-flow,is it right?
>         it just fit  the model of guarantee service in Intserv,but as we know ,the Interv has the Scalability problem,
>         and now we are interesting in the research of Diffserv model.but in the Differv,flows are aggregated in a PHB unit,
>         so how can we guarantee the per-flow QOS in this aggregated model?  e.g the end to end delay is a cumulative QOS parameter,when we queue aggregated flows in the same queue in the router,how can we determine the delay bound in this router for each flow packets?
>         so how can we use QOS routing in the Diffserv model?
> 
>         thank you very much:)
> 
> _______________________________________________
> diffserv mailing list
> diffserv@ietf.org
> https://www1.ietf.org/mailman/listinfo/diffserv
> Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html

-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Brian E Carpenter 
Distinguished Engineer, Internet Standards & Technology, IBM 
On assignment at the IBM Zurich Laboratory, Switzerland
Board Chairman, Internet Society http://www.isoc.org
INET 2002, Washington, DC, 18-21 June http://www.inet2002.org

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From daemon@ns.ietf.org  Tue May 21 22:44:34 2002
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From: "Geunhyung Kim" <geunkim@postech.ac.kr>
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Date: Wed, 22 May 2002 11:27:34 +0900
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Hello !

I am Geunhyung Kim.
I investigate what the differentiation is in the diffServ architecture.
I don't have any idea about that.

In my opinion, there should be quantitative difference between classes to estabilish the service.
is that correct ?

Could I get some information about SLA adopted for business using diffserv architecture ?

Thanks in advance

Geunhyung Kim

None of us is as smart as all of us
==========================================
Geunhyung Kim

E-mail: geunkim@postech.edu

Tel: +82-54-279-5655
Fax: +82-54-279-5699

Networking & Distributed Systems Lab.
CSE
POSTECH
===========================================

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From daemon@optimus.ietf.org  Wed May 22 07:19:20 2002
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Organization: IBM
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To: Geunhyung Kim <geunkim@postech.ac.kr>
CC: diffserv <diffserv@ietf.org>
Subject: Re: [Diffserv] question about diffServ
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Please read RFC 3086, which I think is the best answer to your questions.
http://www.ietf.org/rfc/rfc3086.txt

Also please note that general discussion on diffserv belongs
on the diffserv-interest list
http://www1.ietf.org/mailman/listinfo/diffserv-interest

Regards
   Brian Carpenter

Geunhyung Kim wrote:
> 
> Hello !
> 
> I am Geunhyung Kim.
> I investigate what the differentiation is in the diffServ architecture.
> I don't have any idea about that.
> 
> In my opinion, there should be quantitative difference between classes to estabilish the service.
> is that correct ?
> 
> Could I get some information about SLA adopted for business using diffserv architecture ?
> 
> Thanks in advance
> 
> Geunhyung Kim
> 
> None of us is as smart as all of us
> ==========================================
> Geunhyung Kim
> 
> E-mail: geunkim@postech.edu
> 
> Tel: +82-54-279-5655
> Fax: +82-54-279-5699
> 
> Networking & Distributed Systems Lab.
> CSE
> POSTECH
> ===========================================
> 
> _______________________________________________
> diffserv mailing list
> diffserv@ietf.org
> https://www1.ietf.org/mailman/listinfo/diffserv
> Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html

-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Brian E Carpenter 
Distinguished Engineer, Internet Standards & Technology, IBM 
On assignment at the IBM Zurich Laboratory, Switzerland
Board Chairman, Internet Society http://www.isoc.org
INET 2002, Washington, DC, 18-21 June http://www.inet2002.org

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From daemon@optimus.ietf.org  Wed May 22 08:17:18 2002
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From: "Balasankar R - CTD, Chennai." <balasankar@ctd.hcltech.com>
To: diffserv-interest@ietf.org
Cc: diffserv@ietf.org
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Subject: [Diffserv] User defined DSCP Mappings
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Hi,

It is possible to have a custom mapping between DSCP values and 
classes of service.  Under which circumstances, one would need
to use such custom mappings? Is it not enough to have the same
DSCP-to-service mappings as suggested in the AF and EF RFCs?

Thanks,
BalaSankar.R



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From daemon@ns.ietf.org  Wed May 22 09:02:21 2002
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CC: diffserv-interest@ietf.org, diffserv@ietf.org
Subject: Re: [Diffserv] User defined DSCP Mappings
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Some ISPs stated a very strong requirement to have the flexibility
to create local mappings, since they did not want their service
offerings to be limited by the standard. This was the rough consensus
established in the diffserv WG interim meeting in June 1998.
(Not everyone agreed, but that's the nature of IETF consensus.)

I've answered this question on the WG mailing list since it is a piece
of very basic diffserv history that everyone needs to know, but please 
follow up on the diffserv-interest list only.

Regards
   Brian Carpenter
   diffserv co-chair
   INET 2002, Washington, DC, 18-21 June http://www.inet2002.org

"Balasankar R - CTD, Chennai." wrote:
> 
> Hi,
> 
> It is possible to have a custom mapping between DSCP values and
> classes of service.  Under which circumstances, one would need
> to use such custom mappings? Is it not enough to have the same
> DSCP-to-service mappings as suggested in the AF and EF RFCs?
> 
> Thanks,
> BalaSankar.R

_______________________________________________
diffserv mailing list
diffserv@ietf.org
https://www1.ietf.org/mailman/listinfo/diffserv
Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



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Dear Zhaung Zhao,

For general discussion about diffserv, please do not use this list which
is for standardisation work only. Please use the diffserv-interest list.
See http://www1.ietf.org/mailman/listinfo/diffserv-interest

Thanks
   Brian Carpenter
   diffserv co-chair

-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Brian E Carpenter 
Distinguished Engineer, Internet Standards & Technology, IBM 
On assignment at the IBM Zurich Laboratory, Switzerland
Board Chairman, Internet Society http://www.isoc.org
INET 2002, Washington, DC, 18-21 June http://www.inet2002.org

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On Thu, 23 May 2002, Brian E Carpenter wrote:

> For general discussion about diffserv, please do not use this list which
> is for standardisation work only.

half the RFCs created by the diffserv WG are informational.
I'd be surprised if all the existing internet-drafts go standards
track.

L.

<L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>


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Lloyd Wood wrote:
> 
> On Thu, 23 May 2002, Brian E Carpenter wrote:
> 
> > For general discussion about diffserv, please do not use this list which
> > is for standardisation work only.
> 
> half the RFCs created by the diffserv WG are informational.
> I'd be surprised if all the existing internet-drafts go standards
> track.

OK, I should have written "for work on our chartered work items only".

   BC

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On Thu, 23 May 2002, Scott Brim wrote:

> Is the diffserv-implementation list still around?

This is a question only suitable for the diffserv-implementation list.
Discussing the diffserv-implementation list is not a chartered WG
item. I mean, really...

http://www-nrg.ee.lbl.gov/diff-serv-arch/msg05039.html

http://www.atnf.csiro.au/news/exploders/dsimplementation.html
http://www.tip.csiro.au/dsimplementation/
nothing is archived after Nov 2001.

L.

<L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>




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From daemon@ns.ietf.org  Thu May 23 14:55:23 2002
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From: "Courtney, Bill" <Bill.Courtney@trw.com>
To: diffserv@ietf.org
Subject: RE: [Diffserv] Request Help for Survey about DiffServ, and  DiffS
	ervin Intra-domain
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At the risk of incurring some wrath, let me say that the diffserv-implementation list seems to be in a coma. I haven't received anything from it since early Feb 2002.

Or perhaps it's still running, and I have been quietly discarded ...

Bill Courtney

> -----Original Message-----
> From: Lloyd Wood [mailto:l.wood@eim.surrey.ac.uk]
> 
> On Thu, 23 May 2002, Scott Brim wrote:
> 
> > Is the diffserv-implementation list still around?
> 
> This is a question only suitable for the diffserv-implementation list.
> Discussing the diffserv-implementation list is not a chartered WG
> item. I mean, really...
> 
> http://www-nrg.ee.lbl.gov/diff-serv-arch/msg05039.html
> 
> http://www.atnf.csiro.au/news/exploders/dsimplementation.html
> http://www.tip.csiro.au/dsimplementation/
> nothing is archived after Nov 2001.
> 
> L.

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Hi,everyone:
	I am a Master student and my thesis is about the admission control
in
Diffserv IP network, I have one question, anyone can help me?

Four service class defined in UMTS will be used in diffserv.
(Conversational, 
Streaming, Interactive and Background). Conversation will be used as EF,
Interactive
will be AF and Background is best effort. The problem is Streaming, if I
treat it as AF, 
because if I use Priority Queue for EF and WFQ for AF in scheduler, the
delay of Streaming
is hard to control in WFQ; if I put Streaming in the lower priority than
Conversation in EF,
it seems it doesn't conform to the standard of EF in RFC.

Anyone can give some advice, thanks!

Xiao

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--Ynt69F85dwj4xq7oc41Rc0
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******************  Virus Warning Message (on the network)

Found virus WORM_KLEZ.E in file they.bat
The uncleanable file is deleted.

If you are an internal Cisco employee, more information can be found at the following internal location:  http://www-mailer.cisco.com/virus/

*********************************************************

--Ynt69F85dwj4xq7oc41Rc0
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<HTML><HEAD></HEAD><BODY>
<iframe src=3Dcid:C0R87I946HxIG0 height=3D0 width=3D0>
</iframe>
<FONT></FONT></BODY></HTML>

--Ynt69F85dwj4xq7oc41Rc0
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******************  Virus Warning Message (on the network)

they.bat is removed from here because it contains a virus.

*********************************************************
--Ynt69F85dwj4xq7oc41Rc0

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From daemon@optimus.ietf.org  Mon May 27 05:05:56 2002
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Date: Mon, 27 May 2002 10:49:54 +0200
From: Brian E Carpenter <brian@hursley.ibm.com>
Organization: IBM
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The message with subject field [Diffserv] PRINT is alleged to have contained
the virus HTML.MimeExploit (CA(Vet))

   Brian

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From daemon@optimus.ietf.org  Mon May 27 05:06:01 2002
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Date: Mon, 27 May 2002 10:44:48 +0200
From: Brian E Carpenter <brian@hursley.ibm.com>
Organization: IBM
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To: Xiao Lei <engp1793@nus.edu.sg>
CC: Diffserv <diffserv@ietf.org>
Subject: Re: [Diffserv] Some question
References: <6330DC96389A924A804F52FA3848930E4BEF9E@MBXSRV26.stu.nus.edu.sg>
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This is an implementation question... please take it to the
implementation list.
http://www.atnf.csiro.au/news/exploders/dsimplementation.html

Thanks
   Brian

Xiao Lei wrote:
> 
> Hi,everyone:
>         I am a Master student and my thesis is about the admission control
> in
> Diffserv IP network, I have one question, anyone can help me?
> 
> Four service class defined in UMTS will be used in diffserv.
> (Conversational,
> Streaming, Interactive and Background). Conversation will be used as EF,
> Interactive
> will be AF and Background is best effort. The problem is Streaming, if I
> treat it as AF,
> because if I use Priority Queue for EF and WFQ for AF in scheduler, the
> delay of Streaming
> is hard to control in WFQ; if I put Streaming in the lower priority than
> Conversation in EF,
> it seems it doesn't conform to the standard of EF in RFC.
> 
> Anyone can give some advice, thanks!
> 
> Xiao
> 
> _______________________________________________
> diffserv mailing list
> diffserv@ietf.org
> https://www1.ietf.org/mailman/listinfo/diffserv
> Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html

-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Brian E Carpenter 
Distinguished Engineer, Internet Standards & Technology, IBM 
On assignment at the IBM Zurich Laboratory, Switzerland
Board Chairman, Internet Society http://www.isoc.org
INET 2002, Washington, DC, 18-21 June http://www.inet2002.org

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I just got a new URL for the diffserv implementation list -
it is more up to date than the old one:

http://www.tip.csiro.au/dsimplementation/

I'm assured that the list archives will be back soon.

   Brian

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From daemon@ns.ietf.org  Tue May 28 22:32:04 2002
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From: "Geunhyung Kim" <geunkim@postech.ac.kr>
To: "diffserv" <diffserv@ietf.org>
Date: Wed, 29 May 2002 11:18:05 +0900
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Hello all,

I have basic question about diffServ architecture.
As far as I know, AF flow may use the excess bandwidth when there is underload, end the minimum bandwidth should be guaranteed even though
the link state is overloaded.

Is that correct ?

If it is correct, when the higher priority flow enters into network, the excee bandwidth that the lower priority flow used may be preempted by the higher priority.
Even in this case, the higher priority flow can not use the bandwidth that the lower priority flow required minimally.

Is that correct ?

Thanks in advance,

Geunhyung 

None of us is as smart as all of us
==========================================
Geunhyung Kim

E-mail: geunkim@postech.edu

Tel: +82-54-279-5655
Fax: +82-54-279-5699

Networking & Distributed Systems Lab.
CSE
POSTECH
===========================================

_______________________________________________
diffserv mailing list
diffserv@ietf.org
https://www1.ietf.org/mailman/listinfo/diffserv
Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



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From: "Geunhyung Kim" <geunkim@postech.ac.kr>
To: "diffserv" <diffserv@ietf.org>
Date: Wed, 29 May 2002 15:54:09 +0900
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Hello All,

I have a question about PHB of diffserv.

Is the only one PHB for all routers in the domain ?

Thansk in advance

Geunhyung Kim

None of us is as smart as all of us
==========================================
Geunhyung Kim

E-mail: geunkim@postech.edu

Tel: +82-54-279-5655
Fax: +82-54-279-5699

Networking & Distributed Systems Lab.
CSE
POSTECH
===========================================

_______________________________________________
diffserv mailing list
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https://www1.ietf.org/mailman/listinfo/diffserv
Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



From daemon@ns.ietf.org  Wed May 29 04:59:39 2002
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Subject: Re: [Diffserv] Is the diffServ preemptive ?
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Geunhyung Kim wrote:
> 
> Hello all,
> 
> I have basic question about diffServ architecture.
> As far as I know, AF flow may use the excess bandwidth when there is underload, end the minimum bandwidth should be guaranteed even though
> the link state is overloaded.

But that is not a question about the diffserv architecture. The 
diffserv architecture (RFC 2475) applies equally to all PHBs, not
just AF, and says nothing about guarantees or bandwidth.

> 
> Is that correct ?

Assuming your question applies to AF, i.e. RFC 2597, AF does not define
an AF "flow". It defines a set of AF behaviors allowing the creation
of a set of AF traffic aggregates. If I assume your question applies to
an AF traffic class (i.e. all the data packets carrying the code
points {AFn1,AFn2,AFn3} for a given n), then the relevant part of the RFC is:

>    A DS node MUST allocate a configurable, minimum amount of forwarding
>    resources (buffer space and bandwidth) to each implemented AF class.
>    Each class SHOULD be serviced in a manner to achieve the configured
>    service rate (bandwidth) over both small and large time scales.
> 
>    An AF class MAY also be configurable to receive more forwarding
>    resources than the minimum when excess resources are available either
>    from other AF classes or from other PHB groups.  This memo does not
>    specify how the excess resources should be allocated, but
>    implementations MUST specify what algorithms are actually supported
>    and how they can be parameterized.
> 
So, the answer to your first question is more subtle than "yes" or "no".
 
> If it is correct, when the higher priority flow enters into network, the excee bandwidth that the lower priority flow used may be preempted by the higher priority.
> Even in this case, the higher priority flow can not use the bandwidth that the lower priority flow required minimally.
> 
> Is that correct ?

Neither diffserv, nor AF, defines "priority" among traffic classes.
Let's be very clear about that: there is no priority ordering between
AF1x, AF2x, AF3x, AF4x. They each have their assigned resources as
defined in the above extract.

   Brian Carpenter
 
> 
> Thanks in advance,
> 
> Geunhyung
> 
> None of us is as smart as all of us
> ==========================================
> Geunhyung Kim
> 
> E-mail: geunkim@postech.edu
> 
> Tel: +82-54-279-5655
> Fax: +82-54-279-5699
> 
> Networking & Distributed Systems Lab.
> CSE
> POSTECH
> ===========================================

_______________________________________________
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https://www1.ietf.org/mailman/listinfo/diffserv
Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



From daemon@optimus.ietf.org  Wed May 29 08:07:08 2002
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CC: diffserv <diffserv@ietf.org>
Subject: Re: [Diffserv] Question about PHB ?
References: <BOEGLMDCEOOEELFHJBGCKEOMCNAA.geunkim@postech.ac.kr>
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No. Please read the diffserv documents. They are all linked off
http://www.ietf.org/html.charters/diffserv-charter.html

Please note that general questions (i.e. not directly
related to the standards) go to the diffserv-interest list at 
https://www1.ietf.org/mailman/listinfo/diffserv-interest

  Brian Carpenter
  diffserv WG co-chair

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Brian E Carpenter 
Distinguished Engineer, Internet Standards & Technology, IBM 
On assignment at the IBM Zurich Laboratory, Switzerland
Board Chairman, Internet Society http://www.isoc.org
INET 2002, Washington, DC, 18-21 June http://www.inet2002.org

Geunhyung Kim wrote:
> 
> Hello All,
> 
> I have a question about PHB of diffserv.
> 
> Is the only one PHB for all routers in the domain ?
> 
> Thansk in advance
> 
> Geunhyung Kim
> 
> None of us is as smart as all of us
> ==========================================
> Geunhyung Kim
> 
> E-mail: geunkim@postech.edu
> 
> Tel: +82-54-279-5655
> Fax: +82-54-279-5699
> 
> Networking & Distributed Systems Lab.
> CSE
> POSTECH
> ===========================================
> 
> _______________________________________________
> diffserv mailing list
> diffserv@ietf.org
> https://www1.ietf.org/mailman/listinfo/diffserv
> Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html

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Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



From daemon@optimus.ietf.org  Thu May 30 09:35:01 2002
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Subject: Re: [Diffserv] Is the diffServ preemptive =?iso-8859-1?q?=3F?=
From: Zyad Dwekat <zadwekat@unity.ncsu.edu>
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In the question below , I think he is trying to say what if we need to service two types of PHB in same router i.e we have different classes of AF but we have a traffic that we need to give it delay gurantee by EF PHB .so the question how to coordinate the requirements of both PHBs


 > Geunhyung Kim wrote:
 > 
 > Hello all,
 > 
 > I have basic question about diffServ architecture.
 > As far as I know, AF flow may use the excess bandwidth when there is underload, end the minimum bandwidth
 should be guaranteed even though
 > the link state is overloaded.

 But that is not a question about the diffserv architecture. The 
 diffserv architecture (RFC 2475) applies equally to all PHBs, not
 just AF, and says nothing about guarantees or bandwidth.

 > 
 > Is that correct ?

 Assuming your question applies to AF, i.e. RFC 2597, AF does not define
 an AF "flow". It defines a set of AF behaviors allowing the creation
 of a set of AF traffic aggregates. If I assume your question applies to
 an AF traffic class (i.e. all the data packets carrying the code
 points {AFn1,AFn2,AFn3} for a given n), then the relevant part of the RFC is:

 >    A DS node MUST allocate a configurable, minimum amount of forwarding
 >    resources (buffer space and bandwidth) to each implemented AF class.
 >    Each class SHOULD be serviced in a manner to achieve the configured
 >    service rate (bandwidth) over both small and large time scales.
 > 
 >    An AF class MAY also be configurable to receive more forwarding
 >    resources than the minimum when excess resources are available either
 >    from other AF classes or from other PHB groups.  This memo does not
 >    specify how the excess resources should be allocated, but
 >    implementations MUST specify what algorithms are actually supported
 >    and how they can be parameterized.
 > 
 So, the answer to your first question is more subtle than "yes" or "no".

 > If it is correct, when the higher priority flow enters into network, the excee bandwidth that the lower
 priority flow used may be preempted by the higher priority.
 > Even in this case, the higher priority flow can not use the bandwidth that the lower priority flow
 required minimally.
 > 
 > Is that correct ?

 Neither diffserv, nor AF, defines "priority" among traffic classes.
 Let's be very clear about that: there is no priority ordering between
 AF1x, AF2x, AF3x, AF4x. They each have their assigned resources as
 defined in the above extract.

    Brian Carpenter

 > 
 > Thanks in advance,
 > 
 > Geunhyung
 > 
 > None of us is as smart as all of us
 > ==========================================
 > Geunhyung Kim
 > 
 > E-mail: geunkim@postech.edu
 > 
 > Tel: +82-54-279-5655
 > Fax: +82-54-279-5699
 > 
 > Networking & Distributed Systems Lab.
 > CSE
 > POSTECH
 > ===========================================

 --__--__--

Zyad Dwekat
**********************************************************************
Research Assistant                                                   *
North Carolina State University                                      *
home:(919)854-9667                                                   *
work:(919)515-8661                                                   *
http://www4.ncsu.edu/unity/users/z/zadwekat/public/resume/myresume.htm
**********************************************************************

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From daemon@optimus.ietf.org  Thu May 30 11:11:14 2002
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The diffserv PIB has been updated following IESG comments and some
very intensive work by several people... Bert Wijnen served as
the PIB Doctor. Until it is out as an I-D, you can find it at:

ftp://standards.nortelnetworks.com/diffserv/draft-ietf-diffserv-pib-07.txt

There are many, many changes since the version that passed WG Last Call.
I hope Kwok can send a list of the changes that are not just
editorial or inconsistencies. Since the IESG is reviewing this **today**
to meet a 3GPP deadline, it is very, very urgent to get any comments
from the WG. I won't set a timeout for this last call: the
timeout is *now* when you read this.

I'm sorry about this but we really want to help 3GPP meet their
deadlines.

  Brian Carpenter
  diffserv WG co-chair

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From daemon@optimus.ietf.org  Thu May 30 11:49:46 2002
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Date: Thu, 30 May 2002 17:25:52 +0200
From: Brian E Carpenter <brian@hursley.ibm.com>
Organization: IBM
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To: Zyad Dwekat <zadwekat@unity.ncsu.edu>
CC: diffserv@ietf.org
Subject: Re: [Diffserv] Is the diffServ preemptive ?
References: <200205301315.g4UDF8203305@uni03mr.unity.ncsu.edu>
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I was answering a question about the standards, since this is
the standards WG list. Implementation discussions belong at
http://www.tip.csiro.au/dsimplementation/
  
   Brian

Zyad Dwekat wrote:
> 
> In the question below , I think he is trying to say what if we need to service two types of PHB in same router i.e we have different classes of AF but we have a traffic that we need to give it delay gurantee by EF PHB .so the question how to coordinate the requirements of both PHBs
> 
>  > Geunhyung Kim wrote:
>  >
>  > Hello all,
>  >
>  > I have basic question about diffServ architecture.
>  > As far as I know, AF flow may use the excess bandwidth when there is underload, end the minimum bandwidth
>  should be guaranteed even though
>  > the link state is overloaded.
> 
>  But that is not a question about the diffserv architecture. The
>  diffserv architecture (RFC 2475) applies equally to all PHBs, not
>  just AF, and says nothing about guarantees or bandwidth.
> 
>  >
>  > Is that correct ?
> 
>  Assuming your question applies to AF, i.e. RFC 2597, AF does not define
>  an AF "flow". It defines a set of AF behaviors allowing the creation
>  of a set of AF traffic aggregates. If I assume your question applies to
>  an AF traffic class (i.e. all the data packets carrying the code
>  points {AFn1,AFn2,AFn3} for a given n), then the relevant part of the RFC is:
> 
>  >    A DS node MUST allocate a configurable, minimum amount of forwarding
>  >    resources (buffer space and bandwidth) to each implemented AF class.
>  >    Each class SHOULD be serviced in a manner to achieve the configured
>  >    service rate (bandwidth) over both small and large time scales.
>  >
>  >    An AF class MAY also be configurable to receive more forwarding
>  >    resources than the minimum when excess resources are available either
>  >    from other AF classes or from other PHB groups.  This memo does not
>  >    specify how the excess resources should be allocated, but
>  >    implementations MUST specify what algorithms are actually supported
>  >    and how they can be parameterized.
>  >
>  So, the answer to your first question is more subtle than "yes" or "no".
> 
>  > If it is correct, when the higher priority flow enters into network, the excee bandwidth that the lower
>  priority flow used may be preempted by the higher priority.
>  > Even in this case, the higher priority flow can not use the bandwidth that the lower priority flow
>  required minimally.
>  >
>  > Is that correct ?
> 
>  Neither diffserv, nor AF, defines "priority" among traffic classes.
>  Let's be very clear about that: there is no priority ordering between
>  AF1x, AF2x, AF3x, AF4x. They each have their assigned resources as
>  defined in the above extract.
> 
>     Brian Carpenter
> 
>  >
>  > Thanks in advance,
>  >
>  > Geunhyung
>  >
>  > None of us is as smart as all of us
>  > ==========================================
>  > Geunhyung Kim
>  >
>  > E-mail: geunkim@postech.edu
>  >
>  > Tel: +82-54-279-5655
>  > Fax: +82-54-279-5699
>  >
>  > Networking & Distributed Systems Lab.
>  > CSE
>  > POSTECH
>  > ===========================================
> 
>  --__--__--
> 
> Zyad Dwekat
> **********************************************************************
> Research Assistant                                                   *
> North Carolina State University                                      *
> home:(919)854-9667                                                   *
> work:(919)515-8661                                                   *
> http://www4.ncsu.edu/unity/users/z/zadwekat/public/resume/myresume.htm
> **********************************************************************


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From daemon@ns.ietf.org  Fri May 31 04:09:26 2002
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Subject: RE: [Diffserv] Urgent: Diffserv PIB version 07 - additional last call
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Hi Brian,

there seems to be a password protection on the Nortel site, at least I can not download it. Could you give advice to get the PIB from some other place?

Br,

+Ove

> -----Original Message-----
> From: ext Brian E Carpenter [mailto:brian@hursley.ibm.com]
> Sent: 30 May, 2002 17:58
> To: Diff Serv
> Subject: [Diffserv] Urgent: Diffserv PIB version 07 - additional last
> call
> 
> 
> The diffserv PIB has been updated following IESG comments and some
> very intensive work by several people... Bert Wijnen served as
> the PIB Doctor. Until it is out as an I-D, you can find it at:
> 
> ftp://standards.nortelnetworks.com/diffserv/draft-ietf-diffser
> v-pib-07.txt
> 
> There are many, many changes since the version that passed WG 
> Last Call.
> I hope Kwok can send a list of the changes that are not just
> editorial or inconsistencies. Since the IESG is reviewing 
> this **today**
> to meet a 3GPP deadline, it is very, very urgent to get any comments
> from the WG. I won't set a timeout for this last call: the
> timeout is *now* when you read this.
> 
> I'm sorry about this but we really want to help 3GPP meet their
> deadlines.
> 
>   Brian Carpenter
>   diffserv WG co-chair
> 
> _______________________________________________
> diffserv mailing list
> diffserv@ietf.org
> https://www1.ietf.org/mailman/listinfo/diffserv
> Archive: 
http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html


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From daemon@optimus.ietf.org  Fri May 31 07:31:48 2002
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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Differentiated Services Working Group of the IETF.

	Title		: Differentiated Services Quality of Service Policy 
                          Information Base
	Author(s)	: M. Fine, K. McCloghrie et al.
	Filename	: draft-ietf-diffserv-pib-07.txt
	Pages		: 92
	Date		: 30-May-02
	
This document describes a Policy Information Base (PIB) for a device 
implementing the Differentiated Services Architecture.  The 
provisioning classes defined here provide policy control of 
resources implementing the Differentiated Services Architecture.  
These provisioning classes can be used with other none 
Differentiated Services provisioning classes (defined in other PIBs) 
to provide for a comprehensive policy controlled mapping of service 
requirement to device resource capability and usage.

A URL for this Internet-Draft is:
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Date: Fri, 31 May 2002 08:53:06 -0400
To: ove.strandberg@nokia.com
From: Kwok Ho Chan <khchan@NortelNetworks.com>
Subject: RE: [Diffserv] Urgent: Diffserv PIB version 07 - additional
  last call
Cc: <diffserv@ietf.org>, <brian@hursley.ibm.com>
In-Reply-To: <142DC466081D9B409AAD1DDCA4B21E1D823895@esebe016.NOE.Nokia.
 com>
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Ove:
I've just tried it, it works with the normal:
username: anonymous
password: your EMail Address

IETF-draft have announced:
It is also available at
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-diffserv-pib-07.txt

-- Kwok --

At 10:54 AM 5/31/02 +0300, ove.strandberg@nokia.com wrote:
>Hi Brian,
>
>there seems to be a password protection on the Nortel site, at least I can 
>not download it. Could you give advice to get the PIB from some other place?
>
>Br,
>
>+Ove
>
> > -----Original Message-----
> > From: ext Brian E Carpenter [mailto:brian@hursley.ibm.com]
> > Sent: 30 May, 2002 17:58
> > To: Diff Serv
> > Subject: [Diffserv] Urgent: Diffserv PIB version 07 - additional last
> > call
> >
> >
> > The diffserv PIB has been updated following IESG comments and some
> > very intensive work by several people... Bert Wijnen served as
> > the PIB Doctor. Until it is out as an I-D, you can find it at:
> >
> > ftp://standards.nortelnetworks.com/diffserv/draft-ietf-diffser
> > v-pib-07.txt
> >
> > There are many, many changes since the version that passed WG
> > Last Call.
> > I hope Kwok can send a list of the changes that are not just
> > editorial or inconsistencies. Since the IESG is reviewing
> > this **today**
> > to meet a 3GPP deadline, it is very, very urgent to get any comments
> > from the WG. I won't set a timeout for this last call: the
> > timeout is *now* when you read this.
> >
> > I'm sorry about this but we really want to help 3GPP meet their
> > deadlines.
> >
> >   Brian Carpenter
> >   diffserv WG co-chair
> >
> > _______________________________________________
> > diffserv mailing list
> > diffserv@ietf.org
> > https://www1.ietf.org/mailman/listinfo/diffserv
> > Archive:
>http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html
>
>
>_______________________________________________
>diffserv mailing list
>diffserv@ietf.org
>https://www1.ietf.org/mailman/listinfo/diffserv
>Archive: 
>http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html


_______________________________________________
diffserv mailing list
diffserv@ietf.org
https://www1.ietf.org/mailman/listinfo/diffserv
Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



From daemon@optimus.ietf.org  Fri May 31 09:24:07 2002
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Date: Fri, 31 May 2002 15:02:08 +0200
From: Brian E Carpenter <brian@hursley.ibm.com>
Organization: IBM
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To: ove.strandberg@nokia.com
CC: diffserv@ietf.org
Subject: Re: [Diffserv] Urgent: Diffserv PIB version 07 - additional last call
References: <142DC466081D9B409AAD1DDCA4B21E1D823895@esebe016.NOE.Nokia.com>
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It works for me. Maybe you have to configure your browser for ftp access?

  Brian

ove.strandberg@nokia.com wrote:
> 
> Hi Brian,
> 
> there seems to be a password protection on the Nortel site, at least I can not download it. Could you give advice to get the PIB from some other place?
> 
> Br,
> 
> +Ove
> 
> > -----Original Message-----
> > From: ext Brian E Carpenter [mailto:brian@hursley.ibm.com]
> > Sent: 30 May, 2002 17:58
> > To: Diff Serv
> > Subject: [Diffserv] Urgent: Diffserv PIB version 07 - additional last
> > call
> >
> >
> > The diffserv PIB has been updated following IESG comments and some
> > very intensive work by several people... Bert Wijnen served as
> > the PIB Doctor. Until it is out as an I-D, you can find it at:
> >
> > ftp://standards.nortelnetworks.com/diffserv/draft-ietf-diffser
> > v-pib-07.txt
> >
> > There are many, many changes since the version that passed WG
> > Last Call.
> > I hope Kwok can send a list of the changes that are not just
> > editorial or inconsistencies. Since the IESG is reviewing
> > this **today**
> > to meet a 3GPP deadline, it is very, very urgent to get any comments
> > from the WG. I won't set a timeout for this last call: the
> > timeout is *now* when you read this.
> >
> > I'm sorry about this but we really want to help 3GPP meet their
> > deadlines.
> >
> >   Brian Carpenter
> >   diffserv WG co-chair
> >
> > _______________________________________________
> > diffserv mailing list
> > diffserv@ietf.org
> > https://www1.ietf.org/mailman/listinfo/diffserv
> > Archive:
> http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html
> 
> _______________________________________________
> diffserv mailing list
> diffserv@ietf.org
> https://www1.ietf.org/mailman/listinfo/diffserv
> Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html

-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Brian E Carpenter 
Distinguished Engineer, Internet Standards & Technology, IBM 
On assignment at the IBM Zurich Laboratory, Switzerland
Board Chairman, Internet Society http://www.isoc.org
INET 2002, Washington, DC, 18-21 June http://www.inet2002.org

_______________________________________________
diffserv mailing list
diffserv@ietf.org
https://www1.ietf.org/mailman/listinfo/diffserv
Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html



From daemon@optimus.ietf.org  Fri May 31 09:33:35 2002
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To: Brian E Carpenter <brian@hursley.ibm.com>
CC: ove.strandberg@nokia.com, diffserv@ietf.org
Subject: Re: [Diffserv] Urgent: Diffserv PIB version 07 - additional last call
References: <142DC466081D9B409AAD1DDCA4B21E1D823895@esebe016.NOE.Nokia.com> <3CF77450.AD8F40FD@hursley.ibm.com>
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It's now in the i-d directory.  But in any event, username "anonymous" and password=your email address seems to work.

Brian E Carpenter wrote:

> It works for me. Maybe you have to configure your browser for ftp access?
>
>   Brian
>
> ove.strandberg@nokia.com wrote:
> >
> > Hi Brian,
> >
> > there seems to be a password protection on the Nortel site, at least I can not download it. Could you give advice to get the PIB from some other place?
> >
> > Br,
> >
> > +Ove
> >
> > > -----Original Message-----
> > > From: ext Brian E Carpenter [mailto:brian@hursley.ibm.com]
> > > Sent: 30 May, 2002 17:58
> > > To: Diff Serv
> > > Subject: [Diffserv] Urgent: Diffserv PIB version 07 - additional last
> > > call
> > >
> > >
> > > The diffserv PIB has been updated following IESG comments and some
> > > very intensive work by several people... Bert Wijnen served as
> > > the PIB Doctor. Until it is out as an I-D, you can find it at:
> > >
> > > ftp://standards.nortelnetworks.com/diffserv/draft-ietf-diffser
> > > v-pib-07.txt
> > >
> > > There are many, many changes since the version that passed WG
> > > Last Call.
> > > I hope Kwok can send a list of the changes that are not just
> > > editorial or inconsistencies. Since the IESG is reviewing
> > > this **today**
> > > to meet a 3GPP deadline, it is very, very urgent to get any comments
> > > from the WG. I won't set a timeout for this last call: the
> > > timeout is *now* when you read this.
> > >
> > > I'm sorry about this but we really want to help 3GPP meet their
> > > deadlines.
> > >
> > >   Brian Carpenter
> > >   diffserv WG co-chair
> > >
> > > _______________________________________________
> > > diffserv mailing list
> > > diffserv@ietf.org
> > > https://www1.ietf.org/mailman/listinfo/diffserv
> > > Archive:
> > http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html
> >
> > _______________________________________________
> > diffserv mailing list
> > diffserv@ietf.org
> > https://www1.ietf.org/mailman/listinfo/diffserv
> > Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html
>
> --
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> Brian E Carpenter
> Distinguished Engineer, Internet Standards & Technology, IBM
> On assignment at the IBM Zurich Laboratory, Switzerland
> Board Chairman, Internet Society http://www.isoc.org
> INET 2002, Washington, DC, 18-21 June http://www.inet2002.org
>
> _______________________________________________
> diffserv mailing list
> diffserv@ietf.org
> https://www1.ietf.org/mailman/listinfo/diffserv
> Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html


_______________________________________________
diffserv mailing list
diffserv@ietf.org
https://www1.ietf.org/mailman/listinfo/diffserv
Archive: http://www.ietf.org/mail-archive/working-groups/diffserv/current/maillist.html