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From: "BRUNGARD, DEBORAH A" <db3546@att.com>
To: "stephane.litkowski@orange.com" <stephane.litkowski@orange.com>, "Daniele Ceccarelli" <daniele.ceccarelli@ericsson.com>, "<rtg-ads@ietf.org> (rtg-ads@ietf.org)" <rtg-ads@ietf.org>
CC: "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "draft-ietf-mpls-spring-entropy-label.all@ietf.org" <draft-ietf-mpls-spring-entropy-label.all@ietf.org>
Thread-Topic: RtgDir review: draft-ietf-mpls-spring-entropy-label
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Date: Tue, 1 May 2018 15:39:20 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/p-N-vn3mvcEDQMCHi460ACyWHqs>
Subject: Re: [mpls] RtgDir review: draft-ietf-mpls-spring-entropy-label
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--_000_F64C10EAA68C8044B33656FA214632C8882E78F8MISOUT7MSGUSRDE_--


From nobody Wed May  2 00:44:52 2018
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From: Loa Andersson <loa@pi.nu>
To: "mpls@ietf.org" <mpls@ietf.org>
Cc: "spring@ietf.org" <spring@ietf.org>, "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>, "mpls-ads@ietf.org" <mpls-ads@ietf.org>
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Subject: [mpls] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Working Group,

February 1st the MPLS working Group requested that draft-ietf-mpls-
spring-entropy-label should be published as an Informational RFC.

During the RTG Directorate and AD reviews the question whether the
document should instead be published as a RFC on the Standards Track
has been raised.

The decision to make the document Informational was taken "a long time
ago", based on discussions between the authors and involving the
document shepherd, on the wg mailing list. At that point it we were
convinced that the document should be progressed as an Informational
document.

It turns out that there has been such changes to the document that we
now would like to request input from the working group if we should make
the document a Standards Track RFC.

Daniele's RTG Directorate review can be found at at:
https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/

All the issues, with the exception whether it should be Informational
or Standards track, has been resolved as part AD review.

If the document is progressed as a Standard Tracks document then we
also need to answer the question whether this is an update RFC 6790.

This mail starts a one week poll (ending May 9) to see if we have
support to make the document a Standards Track document. If you support
placing it on the Standards Track also consider if it is an update to
RFC 6790.

Please send your comments to the MPLS wg mailing list ( mpls@ietf.org ).

/Loa
for the mpls wf co-chairs

PS

I'm copying the spring working group on this mail.
-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Bronze Dragon Consulting             phone: +46 739 81 21 64


From nobody Wed May  2 04:22:23 2018
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To: "Andrew G. Malis" <agmalis@gmail.com>
Cc: "Zafar Ali (zali)" <zali@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, SPRING WG List <spring@ietf.org>, mpls <mpls-bounces@ietf.org>, "sfc@ietf.org" <sfc@ietf.org>
References: <2ac6b61d-3a38-1aaf-62ae-d923f1ad7468@pi.nu> <CA+b+ERnJNad6Awo+-2dU2kz6rwx-HQEniXcWgjoWUd-zm3r2qQ@mail.gmail.com> <F64C10EAA68C8044B33656FA214632C88828EFEB@MISOUT7MSGUSRDE.ITServices.sbc.com> <CA+b+ER==g53MZK5RSNmaFkg1UBC8zEiNsfxNLKCNXDumannaHg@mail.gmail.com> <F64C10EAA68C8044B33656FA214632C88828F06D@MISOUT7MSGUSRDE.ITServices.sbc.com> <052998BB-B820-412C-8363-B3EB7551B299@nokia.com> <1522554645079.8864@bell.ca> <CA+b+ERmzFPZRyrCnBvnRVhK5F25RMc8+Wt-n6NXKrONWy9G+_g@mail.gmail.com> <1522812352107.5966@bell.ca> <489a9667-f159-4607-5834-b4bacf64989c@gmail.com> <09337fcf-64c9-450c-8dbc-ba8330611fe4.xiaohu.xxh@alibaba-inc.com> <6EE25554-3714-4A75-896F-24CC89BAA807@gmail.com> <5dab5411-0b08-4bd4-86ec-752e1803c3ff.xiaohu.xxh@alibaba-inc.com> <6bea41f6-5519-f512-92e5-a72bbd6187da@gmail.com> <BD0B4559-A1B8-4724-B55D-B11D6DE94278@cisco.com> <CAA=duU0BWK9tik2FXvj_wqMbfMwp5XmU6ADNXE52bpetMXdczw@mail.gmail.com>
From: Loa Andersson <loa@pi.nu>
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Subject: Re: [mpls] [sfc] Working Group adoption of draft-farrel-mpls-sfc
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Andy,

The chairs of the SPRING and MPLS wg has discussed the proposal to
adopt draft-xuclad-spring-sr-service-chaining in the MPLS wg.
Our agreement is that draft-xuclad-spring-sr-service-chaining
belongs in the SPRING wg.

/Loa
for the SPRING and MPLS wg co-chairs

On 2018-04-15 16:55, Andrew G. Malis wrote:
> Zafar, et al,
> 
> Perhaps the fairest to all concerned is for the MPLS WG to adopt both 
> drafts, and then it will be up to the WG (rather than the authors) to 
> best determine the technical details going forward, and how best to 
> document them. That way the work becomes the consensus product of the WG.
> 
> Cheers,
> Andy
> 
> 
> On Sun, Apr 15, 2018 at 12:44 AM, Zafar Ali (zali) <zali@cisco..com 
> <mailto:zali@cisco.com>> wrote:
> 
>     Dear Stewart, WG Chairs and the WG, ____
> 
>     __ __
> 
>     I do not agree with Stewart’s points and will response in a separate
>     email. But all that is just noise and that cannot resolve the issue
>     at hand. ____
> 
>     __ __
> 
>     A countless time, Xiaohu has raised the issue that the intellectual
>     property for the contents in section 6 of draft-farrel-mpls-sfc
>     belongs to draft-xu-mpls-service-chaining. Please see one of
>     Xiaohu's recent emails with the subject *"[spring] For the fairness
>     and justice of the IETF culture"* dated Thursday, April 5, 2018 at
>     12:34 AM, copied in the following. ____
> 
>     __ __
> 
>     This issue was also raised by many during the WG adoption poll of
>     the document. The chairs adopted the work with the promise of fixing
>     the issue. Specifically, in the email to announce the adoption of
>     the ID to the WG, the chair(s) mentioned the following:____
> 
>     __ __
> 
>     "That decision is taken, the issues that has been pointed out are____
> 
>     noted. These issues need to be resolved on the mailing list and____
> 
>     rough consensus need to be reached for text changes in the document.____
> 
>     Actually the members of the working group have much more influence
>     on____
> 
>     a working group document, than on an individual draft.____
> 
>     It would be far better if we now focused on proposing text changes,____
> 
>     rather than discussing processes."____
> 
>     __ __
> 
>     This is a serious issue; we need to remove section 6 from draft-
>     farrel-mpls-sfc to move forward. These contents will proceed in
>     draft-xu*, where the contents started initially. Everyone will have
>     a fair chance to contribute to the contents as part of
>     collaborations on draft-xu*. __ __
> 
>     __ __
> 
>     Thanks____
> 
>     __ __
> 
>     Regards … Zafar ____
> 
>     __ __
> 
>     *From: *spring <spring-bounces@ietf.org
>     <mailto:spring-bounces@ietf.org>> on behalf of "徐小虎(义先)"
>     <xiaohu..xxh@alibaba-inc.com <mailto:xiaohu.xxh@alibaba-inc.com>>
>     *Date: *Thursday, April 5, 2018 at 12:34 AM
>     *To: *"mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>     <mailto:mpls@ietf.org>>, SPRING WG List <spring@ietf.org
>     <mailto:spring@ietf.org>>
>     *Cc: *"ietf@ietf.org <mailto:ietf@ietf.org>" <ietf@ietf.org
>     <mailto:ietf@ietf.org>>
>     *Subject: *[spring] For the fairness and justice of the IETF
>     culture//Re: [mpls] What to do with draft-ietf-mpls-sfc-00.txt____
> 
>     __ __
> 
>     Hi all,____
> 
>     __ __
> 
>     As I had pointed out before, this draft describes two MPLS-based SFC____
> 
>     approaches: one is how to encode the NSH info, more specifically,
>     the SPI____
> 
>     and SI info by two MPLS labels, which is still a stateful SFC
>     mechanism____
> 
>     just like NSH; another is how to leverage the MPLS-SR to realize a____
> 
>     stateless SFC (see section 6).____
> 
>     __ __
> 
>     It has been pointed out by many people that section 6 of the draft
>     copies____
> 
>     the____
> 
>     idea of (https://tools.ietf.org/html/draft-xu-mpls-service-chaining
>     <https://tools.ietf.org/html/draft-xu-mpls-service-chaining>)____
> 
>     without any technology contribution except replacing “MPLS Segment____
> 
>     Routing” by “Label Stack”. Funnily, one author of
>     draft-ietf-mpls-sfc____
> 
>     had inadvertently admitted____
> 
>     "using a different name for the same thing is not so clever" (see____
> 
>     https://mailarchive.ietf.org/arch/msg/mpls/y7FTc38ysVf6PyJlA04MEFSN9nc
>     <https://mailarchive.ietf.org/arch/msg/mpls/y7FTc38ysVf6PyJlA04MEFSN9nc>)
>     in____
> 
>     another thread. ____
> 
>     __ __
> 
>     IMHO, the indulgence towards such behavior of copying____
> 
>     ideas of existing drafts with word tricks would seriously trample____
> 
>     underfoot the fairness and justice of the IETF culture. At least, it
>     would____
> 
>     badly damage the interest and enthusiasm of IETF participants,
>     especially____
> 
>     newcomers and non-native speakers of English.____
> 
>     __ __
> 
>     Best regards,____
> 
>     Xiaohu____
> 
>     __ __
> 
>     __ __
> 
>     __ __
> 
>     __ __
> 
>     *From: *mpls <mpls-bounces@ietf.org <mailto:mpls-bounces@ietf.org>>
>     on behalf of Stewart Bryant <stewart.bryant@gmail.com
>     <mailto:stewart.bryant@gmail.com>>
>     *Date: *Friday, April 13, 2018 at 3:10 AM
>     *To: *"徐小虎(义先)" <xiaohu..xxh@alibaba-inc.com
>     <mailto:xiaohu.xxh@alibaba-inc.com>>
>     *Cc: *"mpls@ietf.org <mailto:mpls@ietf.org>" <mpls@ietf.org
>     <mailto:mpls@ietf.org>>, mpls <mpls-bounces@ietf.org
>     <mailto:mpls-bounces@ietf.org>>, Robert Raszuk <robert@raszuk.net
>     <mailto:robert@raszuk.net>>, "sfc@ietf.org <mailto:sfc@ietf.org>"
>     <sfc@ietf.org <mailto:sfc@ietf.org>>
>     *Subject: *Re: [mpls] [sfc] Working Group adoption of
>     draft-farrel-mpls-sfc____
> 
>     __ __
> 
>     __ __
> 
>     __ __
> 
>     On 13/04/2018 08:23, 徐小虎(义先) wrote:____
> 
>         Hi Stewart,____
> 
>         __ __
> 
>         Thanks for your response. For the SR-based SFC mechanism that
>         has been described in draft-xuclad*, it's not helpful to
>         describe it again in another draft. The most simple and
>         efficient way to address the overlapping issue is to reference
>         draft-xuclad* rather than "using a different name
>         for the same thing". I'm looking forward to seeing the revision
>         of draft-farrel* that would address the overlapping issue
>         concretely.____
> 
> 
>     Please read what I said.
> 
>     There are subtle but important technical differences between the two
>     approaches.
> 
>     - Stewart
> 
> 
>     ____
> 
> 
> 
>         ____
> 
>         If co-authors of draft-farrel* believed the current text as
>         described in draft-xuclad* is not good enough or misses
>         something important, any comments and suggestions are more than
>         welcome.____
> 
> 
>     I will send you some text to include in draft-xuclad that points to
>     the important differences in the approach taken in draft-farrel.
>     This will clarify the issue to the reader.
> 
>     I hope that this is an acceptable resolution of this issue.
> 
>     - Stewart
> 
> 
> 
>     ____
> 
> 
> 
>         ____
> 
>         Best regards,____
> 
>         Xiaohu____
> 
>             ------------------------------------------------------------------____
> 
>             Stewart Bryant
>             <stewart.bryant@gmail.com><mailto:stewart.bryant@gmail.com>____
> 
>             2018年4月13日(星期五) 13:27____
> 
>             徐小虎(义先)
>             <xiaohu.xxh@alibaba-inc.com><mailto:xiaohu.xxh@alibaba-inc.com>____
> 
>             mpls <mpls-bounces@ietf.org><mailto:mpls-bounces@ietf.org>;
>             "Bernier, Daniel"
>             <daniel.bernier@bell.ca><mailto:daniel.bernier@bell.ca>;
>             Robert Raszuk <robert@raszuk.net><mailto:robert@raszuk.net>;
>             mpls@ietf.org<mailto:mpls@ietf.org><mpls@ietf.org><mailto:mpls@ietf.org>;
>             sfc@ietf.org<mailto:sfc@ietf.org><sfc@ietf.org><mailto:sfc@ietf.org>____
> 
>             Re: [mpls] [sfc] Working Group adoption of
>             draft-farrel-mpls-sfc____
> 
>             __ __
> 
>             Hi Xiaohu ____
> 
>             __ __
> 
>             What an earlier version of the draft said is of no
>             importance. What it says going forward is what counts.____
> 
>             __ __
> 
>             Perhaps the way to address your concern is to include some
>             text of the form that I used in my email of yesterday to
>             describe to the reader the difference in approach. This is
>             consistent with earlier advice in this discussion to
>             reference the work from which this forked.____
> 
>             __ __
> 
>             - Stewart____
> 
>             __ __
> 
>             __ __
> 
>             Sent from my iPad____
> 
> 
>             On 13 Apr 2018, at 03:35, 徐小虎(义先)
>             <xiaohu.xxh@alibaba-inc.com<mailto:xiaohu.xxh@alibaba-inc.com>>
>             wrote:____
> 
>             Hi Stewart,____
> 
>             __ __
> 
>             If draft-farrel* was just describing an MPLS-based SFC
>             technology that is different from the MPLS-SR-based SFC
>             technology that has been described in draft-xuclad*, that
>             would be fine. However, draft-farrel* also described the
>             technology that has been described in draft-xuclad* (see
>             section 6) by "using a different name for the same thing".
>             Note that the title of section 6 in those pervious versions
>             of draft-farrel* is ____
> 
>             "MPLS Segment Routing". One co-author of draft-farrel* said
>             they worked very hard to change the "Segment Routing" term
>             to "label stack" term in the new version of draft-farrel* in
>             order to deal with the overlapping issue. However, such
>             change is just "using a different name for the same thing",
>             and it doesn't solve the overlapping issue at all, as had
>             been pointed out by many people. As said by one co-author of
>             draft-farrel*, in a thread which is irrelavant to this
>             overlapping issue, "using a different
>             name for the same thing is not so clever:)". In fact, it
>             would cause unneccessary confusions to implementors by
>             describing the same technology within different drafts. More
>             badly, it would set a bad precedant in the IETF of copying
>             the idea of the existing draft by
>             "using a different name for the same thing".____
> 
> 
> 
>             ____
> 
>             Best regards,____
> 
>             Xiaohu____
> 
>             ------------------------------------------------------------------____
> 
>             Stewart Bryant
>             <stewart.bryant@gmail.com<mailto:stewart.bryant@gmail.com>>____
> 
>             2018年4月12日(星期四) 23:04____
> 
>             "Bernier, Daniel"
>             <daniel.bernier@bell.ca<mailto:daniel.bernier@bell.ca>>;
>             Robert Raszuk <robert@raszuk.net<mailto:robert@raszuk.net>>____
> 
>             mpls@ietf.org<mailto:mpls@ietf.org><mpls@ietf.org<mailto:mpls@ietf.org>>;
>             sfc@ietf.org<mailto:sfc@ietf.org><sfc@ietf.org<mailto:sfc@ietf.org>>____
> 
>             Re: [mpls] [sfc] Working Group adoption of
>             draft-farrel-mpls-sfc____
> 
>             __ __
> 
> 
>             Rather than have a process discussion, I think we should
>             go up a level
>             and better understand the technical differences between
>             the two drafts.
> 
>             draft-farrel-mpls-sfc describes the actions at a
>             hop in terms of a tuple
>             that mirrors the SFC approach that allows a short indication of
>             potentially re-entrant chains. In its simplest form it uses
>             a compact
>             MPLS stack to describe an arbitarily complex path that
>             is compatile with
>             simple edge routers which are often challenged in terms of
>             the number of
>             labels that they can push.
> 
>             draft-xu-clad-spring-sr-service-chaining unrolls the
>             path and explicitly
>             calls out each hop and each
>             function into the label stack. This results
>             in a much larger MPLS label stack that will challenge
>             some edge routers.
>             The way that we generally deal with imposition limits
>             is through the use
>             of binding-SIDs, which in the limiting case resolves to the
>             approach in
>             draft-farrel with the limitation that the position
>             on the path is
>             implicit in the label stack size rather than explicitly
>             specified by the SI.
> 
>             Mid-flight path changes (if such things are needed) is
>             clearly simpler
>             with draft-farrel.
> 
>             The short stack in draft-farrel comes at the cost of
>             greater network
>             forwarding stack, and the long stack is the price that
>             draft-xu-clad
>             pays for the reduction in forwarding state.
> 
>             The optimal design point between forwarding and
>             control plane state is
>             something that is dependent on many parameters, and is
>             dependent on many
>             network and operational
>             factors, so much so, that don't think it is wise
>             to rule either out of scope at this stage.
> 
>             The hybrid mode in section 6 of draft-farrel supports the
>             mixed mode in
>             section 7 of the draft. This allows the construction of
>             SFCs that are
>             the concatination of two or more compacted sub-chains.
>             This allows the
>             operator to deploy a solution
>             with the advantages of draft-farrel
>             together with some of the flexibility of draft-xu-clad.
> 
>             At this stage the two drafts are sufficienly different
>             that I think we
>             need to proceed with both at least to the point where we fully
>             understand the detailed consequences of the two
>             approachs and the
>             scenarios where each finds it's niche.
> 
>             After developing a better understanding the detail of
>             each design, their
>             control plane, and operational contexts and how
>             each maps to customer
>             network requirements, we can move the drafts to the
>             appropriate IETF
>             track. Such tracks may be anything from abandonment to
>             IETF standard for
>             one or both of these approaches.
> 
>             Meanwhile I think that we need to focus our efforts on a deeper
>             understanding of the technology and how each might
>             make the Internet
>             work better,  rather than spending effort on arguing
>             about IETF process.
> 
>             - Stewart
> 
>             _______________________________________________
>             mpls mailing list
>             mpls@ietf.org<mailto:mpls@ietf.org>
>             https://www.ietf.org/mailman/listinfo/mpls<https://www.ietf.org/mailman/listinfo/mpls>____
> 
>             __ __
> 
>             _______________________________________________
>             mpls mailing list
>             mpls@ietf.org<mailto:mpls@ietf.org>
>             https://www.ietf.org/mailman/listinfo/mpls<https://www.ietf.org/mailman/listinfo/mpls>____
> 
>         __ __
> 
> 
> 
>     ____
> 
> 
>     _______________________________________________
>     mpls mailing list
>     mpls@ietf.org <mailto:mpls@ietf.org>
>     https://www.ietf.org/mailman/listinfo/mpls
>     <https://www.ietf.org/mailman/listinfo/mpls>
> 
> 
> 
> 
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls
> 

-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Bronze Dragon Consulting             phone: +46 739 81 21 64


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From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Wed, 2 May 2018 08:10:24 -0400
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To: Loa Andersson <loa@pi.nu>
Cc: "Zafar Ali (zali)" <zali@cisco.com>, "mpls@ietf.org" <mpls@ietf.org>, SPRING WG List <spring@ietf.org>,  mpls <mpls-bounces@ietf.org>, "sfc@ietf.org" <sfc@ietf.org>
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Subject: Re: [mpls] [sfc] Working Group adoption of draft-farrel-mpls-sfc
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--000000000000f58a48056b37f9a3
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Loa,

Thanks for the update, much appreciated.

Cheers,
Andy

On Wed, May 2, 2018 at 7:22 AM, Loa Andersson <loa@pi.nu> wrote:

> Andy,
>
> The chairs of the SPRING and MPLS wg has discussed the proposal to
> adopt draft-xuclad-spring-sr-service-chaining in the MPLS wg.
> Our agreement is that draft-xuclad-spring-sr-service-chaining
> belongs in the SPRING wg.
>
> /Loa
> for the SPRING and MPLS wg co-chairs
>
> On 2018-04-15 16:55, Andrew G. Malis wrote:
>
>> Zafar, et al,
>>
>> Perhaps the fairest to all concerned is for the MPLS WG to adopt both
>> drafts, and then it will be up to the WG (rather than the authors) to best
>> determine the technical details going forward, and how best to document
>> them. That way the work becomes the consensus product of the WG.
>>
>> Cheers,
>> Andy
>>
>>

--000000000000f58a48056b37f9a3
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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Loa,<div><br></div><div>Thanks for the update, much apprec=
iated.</div><div><br></div><div>Cheers,</div><div>Andy</div><div class=3D"g=
mail_extra"><br><div class=3D"gmail_quote">On Wed, May 2, 2018 at 7:22 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;padding-left:1ex">A=
ndy,<br>
<br>
The chairs of the SPRING and MPLS wg has discussed the proposal to<br>
adopt draft-xuclad-spring-sr-service<wbr>-chaining in the MPLS wg.<br>
Our agreement is that draft-xuclad-spring-sr-service<wbr>-chaining<br>
belongs in the SPRING wg.<br>
<br>
/Loa<br>
for the SPRING and MPLS wg co-chairs<span class=3D""><br>
<br>
On 2018-04-15 16:55, Andrew G. Malis wrote:<br>
</span><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex"><span class=3D"">
Zafar, et al,<br>
<br>
Perhaps the fairest to all concerned is for the MPLS WG to adopt both draft=
s, and then it will be up to the WG (rather than the authors) to best deter=
mine the technical details going forward, and how best to document them. Th=
at way the work becomes the consensus product of the WG.<br>
<br>
Cheers,<br>
Andy<br>
<br></span></blockquote></blockquote></div></div></div>

--000000000000f58a48056b37f9a3--


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From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Wed, 2 May 2018 09:01:15 -0400
Message-ID: <CAA=duU3Xc3BvYT1cmVN97vsEYQMsmm6kGqZaibuGOr6QrX42_w@mail.gmail.com>
To: Loa Andersson <loa@pi.nu>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  "mpls-ads@ietf.org" <mpls-ads@ietf.org>,  "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/CZJbTwbQzRBkNTJwaZF5hC2Q7oo>
Subject: Re: [mpls] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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--000000000000d169ad056b38af9f
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Loa,

There=E2=80=99s plenty of RFC 2119 language in the draft, so I support maki=
ng this
standards track.

Cheers,
Andy


On Wed, May 2, 2018 at 3:44 AM, Loa Andersson <loa@pi.nu> wrote:

> Working Group,
>
> February 1st the MPLS working Group requested that draft-ietf-mpls-
> spring-entropy-label should be published as an Informational RFC.
>
> During the RTG Directorate and AD reviews the question whether the
> document should instead be published as a RFC on the Standards Track
> has been raised.
>
> The decision to make the document Informational was taken "a long time
> ago", based on discussions between the authors and involving the
> document shepherd, on the wg mailing list. At that point it we were
> convinced that the document should be progressed as an Informational
> document.
>
> It turns out that there has been such changes to the document that we
> now would like to request input from the working group if we should make
> the document a Standards Track RFC.
>
> Daniele's RTG Directorate review can be found at at:
> https://datatracker.ietf.org/doc/review-ietf-mpls-spring-ent
> ropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/
>
> All the issues, with the exception whether it should be Informational
> or Standards track, has been resolved as part AD review.
>
> If the document is progressed as a Standard Tracks document then we
> also need to answer the question whether this is an update RFC 6790.
>
> This mail starts a one week poll (ending May 9) to see if we have
> support to make the document a Standards Track document. If you support
> placing it on the Standards Track also consider if it is an update to
> RFC 6790.
>
> Please send your comments to the MPLS wg mailing list ( mpls@ietf.org ).
>
> /Loa
> for the mpls wf co-chairs
>
> PS
>
> I'm copying the spring working group on this mail.
> --
>
>
> Loa Andersson                        email: loa@pi.nu
> Senior MPLS Expert
> Bronze Dragon Consulting             phone: +46 739 81 21 64
>
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls
>

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<div dir=3D"ltr">Loa,<div><br></div><div>There=E2=80=99s plenty of RFC 2119=
 language in the draft, so I support making this standards track.</div><div=
><br></div><div>Cheers,</div><div>Andy</div><div><br></div></div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, May 2, 2018 at 3:44=
 AM, Loa Andersson <span dir=3D"ltr">&lt;<a href=3D"mailto:loa@pi.nu" targe=
t=3D"_blank">loa@pi.nu</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex">Working Group,<br>
<br>
February 1st the MPLS working Group requested that draft-ietf-mpls-<br>
spring-entropy-label should be published as an Informational RFC.<br>
<br>
During the RTG Directorate and AD reviews the question whether the<br>
document should instead be published as a RFC on the Standards Track<br>
has been raised.<br>
<br>
The decision to make the document Informational was taken &quot;a long time=
<br>
ago&quot;, based on discussions between the authors and involving the<br>
document shepherd, on the wg mailing list. At that point it we were<br>
convinced that the document should be progressed as an Informational<br>
document.<br>
<br>
It turns out that there has been such changes to the document that we<br>
now would like to request input from the working group if we should make<br=
>
the document a Standards Track RFC.<br>
<br>
Daniele&#39;s RTG Directorate review can be found at at:<br>
<a href=3D"https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy=
-label-08-rtgdir-lc-ceccarelli-2018-02-21/" rel=3D"noreferrer" target=3D"_b=
lank">https://datatracker.ietf.org/d<wbr>oc/review-ietf-mpls-spring-ent<wbr=
>ropy-label-08-rtgdir-lc-ceccar<wbr>elli-2018-02-21/</a><br>
<br>
All the issues, with the exception whether it should be Informational<br>
or Standards track, has been resolved as part AD review.<br>
<br>
If the document is progressed as a Standard Tracks document then we<br>
also need to answer the question whether this is an update RFC 6790.<br>
<br>
This mail starts a one week poll (ending May 9) to see if we have<br>
support to make the document a Standards Track document. If you support<br>
placing it on the Standards Track also consider if it is an update to<br>
RFC 6790.<br>
<br>
Please send your comments to the MPLS wg mailing list ( <a href=3D"mailto:m=
pls@ietf.org" target=3D"_blank">mpls@ietf.org</a> ).<br>
<br>
/Loa<br>
for the mpls wf co-chairs<br>
<br>
PS<br>
<br>
I&#39;m copying the spring working group on this mail.<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@pi.nu" target=3D"_blank"=
>loa@pi.nu</a><br>
Senior MPLS Expert<br>
Bronze Dragon Consulting=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0pho=
ne: +46 739 81 21 64<br>
<br>
______________________________<wbr>_________________<br>
mpls mailing list<br>
<a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/mpls" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/l<wbr>istinfo/mpls</a><br>
</font></span></blockquote></div><br></div>

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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: Loa Andersson <loa@pi.nu>
CC: "mpls@ietf.org" <mpls@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "mpls-ads@ietf.org" <mpls-ads@ietf.org>, "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>, "Andrew G. Malis" <agmalis@gmail.com>
Thread-Topic: [spring] [mpls] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/T4IfoL9-ZrL8XE9qAj_eD7ry4Mg>
Subject: Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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To: "Andrew G. Malis" <agmalis@gmail.com>, Loa Andersson <loa@pi.nu>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "mpls-ads@ietf.org" <mpls-ads@ietf.org>, "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>
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From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Wed, 2 May 2018 14:51:30 +0100
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Subject: Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Be careful.

There is text in the draft that talks about ECMP behaviour in different 
parts of the path, which implies an expectation that the EL is the sole 
source of entropy. If we make this ST then we will be implicitly 
standardizing that behaviour. Now as it happens, I thing we need to 
update the EL behaviour to make it the sole source of entropy, because 
that solves a number of problems, particularly in network 
instrumentation, but we need to do that explicitly and not as an 
artefact of this draft.

So the way I see it, either this draft is published as informational, or 
it is published as ST without any text that implies that the EL is the 
sole source of entropy, or we harden the EL behaviour (which I think we 
need to do) and this draft is published with a normative reference to an 
RFC that specifies the stricter EL behaviour.

- Stewart


On 02/05/2018 14:01, Andrew G. Malis wrote:
> Loa,
>
> There’s plenty of RFC 2119 language in the draft, so I support making 
> this standards track.
>
> Cheers,
> Andy
>
>
> On Wed, May 2, 2018 at 3:44 AM, Loa Andersson <loa@pi.nu 
> <mailto:loa@pi.nu>> wrote:
>
>     Working Group,
>
>     February 1st the MPLS working Group requested that draft-ietf-mpls-
>     spring-entropy-label should be published as an Informational RFC.
>
>     During the RTG Directorate and AD reviews the question whether the
>     document should instead be published as a RFC on the Standards Track
>     has been raised.
>
>     The decision to make the document Informational was taken "a long time
>     ago", based on discussions between the authors and involving the
>     document shepherd, on the wg mailing list. At that point it we were
>     convinced that the document should be progressed as an Informational
>     document.
>
>     It turns out that there has been such changes to the document that we
>     now would like to request input from the working group if we
>     should make
>     the document a Standards Track RFC.
>
>     Daniele's RTG Directorate review can be found at at:
>     https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/
>     <https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/>
>
>     All the issues, with the exception whether it should be Informational
>     or Standards track, has been resolved as part AD review.
>
>     If the document is progressed as a Standard Tracks document then we
>     also need to answer the question whether this is an update RFC 6790.
>
>     This mail starts a one week poll (ending May 9) to see if we have
>     support to make the document a Standards Track document. If you
>     support
>     placing it on the Standards Track also consider if it is an update to
>     RFC 6790.
>
>     Please send your comments to the MPLS wg mailing list (
>     mpls@ietf.org <mailto:mpls@ietf.org> ).
>
>     /Loa
>     for the mpls wf co-chairs
>
>     PS
>
>     I'm copying the spring working group on this mail.
>     -- 
>
>
>     Loa Andersson                        email: loa@pi.nu
>     <mailto:loa@pi.nu>
>     Senior MPLS Expert
>     Bronze Dragon Consulting             phone: +46 739 81 21 64
>
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    <p>Be careful.</p>
    <p>There is text in the draft that talks about ECMP behaviour in
      different parts of the path, which implies an expectation that the
      EL is the sole source of entropy. If we make this ST then we will
      be implicitly standardizing that behaviour. Now as it happens, I
      thing we need to update the EL behaviour to make it the sole
      source of entropy, because that solves a number of problems,
      particularly in network instrumentation, but we need to do that
      explicitly and not as an artefact of this draft.</p>
    <p>So the way I see it, either this draft is published as
      informational, or it is published as ST without any text that
      implies that the EL is the sole source of entropy, or we harden
      the EL behaviour (which I think we need to do) and this draft is
      published with a normative reference to an RFC that specifies the
      stricter EL behaviour.<br>
    </p>
    <p>- Stewart<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 02/05/2018 14:01, Andrew G. Malis
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAA=duU3Xc3BvYT1cmVN97vsEYQMsmm6kGqZaibuGOr6QrX42_w@mail.gmail.com">
      <div dir="ltr">Loa,
        <div><br>
        </div>
        <div>There’s plenty of RFC 2119 language in the draft, so I
          support making this standards track.</div>
        <div><br>
        </div>
        <div>Cheers,</div>
        <div>Andy</div>
        <div><br>
        </div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Wed, May 2, 2018 at 3:44 AM, Loa
          Andersson <span dir="ltr">&lt;<a href="mailto:loa@pi.nu"
              target="_blank" moz-do-not-send="true">loa@pi.nu</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">Working
            Group,<br>
            <br>
            February 1st the MPLS working Group requested that
            draft-ietf-mpls-<br>
            spring-entropy-label should be published as an Informational
            RFC.<br>
            <br>
            During the RTG Directorate and AD reviews the question
            whether the<br>
            document should instead be published as a RFC on the
            Standards Track<br>
            has been raised.<br>
            <br>
            The decision to make the document Informational was taken "a
            long time<br>
            ago", based on discussions between the authors and involving
            the<br>
            document shepherd, on the wg mailing list. At that point it
            we were<br>
            convinced that the document should be progressed as an
            Informational<br>
            document.<br>
            <br>
            It turns out that there has been such changes to the
            document that we<br>
            now would like to request input from the working group if we
            should make<br>
            the document a Standards Track RFC.<br>
            <br>
            Daniele's RTG Directorate review can be found at at:<br>
            <a
href="https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/"
              rel="noreferrer" target="_blank" moz-do-not-send="true">https://datatracker.ietf.org/d<wbr>oc/review-ietf-mpls-spring-ent<wbr>ropy-label-08-rtgdir-lc-ceccar<wbr>elli-2018-02-21/</a><br>
            <br>
            All the issues, with the exception whether it should be
            Informational<br>
            or Standards track, has been resolved as part AD review.<br>
            <br>
            If the document is progressed as a Standard Tracks document
            then we<br>
            also need to answer the question whether this is an update
            RFC 6790.<br>
            <br>
            This mail starts a one week poll (ending May 9) to see if we
            have<br>
            support to make the document a Standards Track document. If
            you support<br>
            placing it on the Standards Track also consider if it is an
            update to<br>
            RFC 6790.<br>
            <br>
            Please send your comments to the MPLS wg mailing list ( <a
              href="mailto:mpls@ietf.org" target="_blank"
              moz-do-not-send="true">mpls@ietf.org</a> ).<br>
            <br>
            /Loa<br>
            for the mpls wf co-chairs<br>
            <br>
            PS<br>
            <br>
            I'm copying the spring working group on this mail.<span
              class="HOEnZb"><font color="#888888"><br>
                -- <br>
                <br>
                <br>
                Loa Andersson                        email: <a
                  href="mailto:loa@pi.nu" target="_blank"
                  moz-do-not-send="true">loa@pi.nu</a><br>
                Senior MPLS Expert<br>
                Bronze Dragon Consulting             phone: +46 739 81
                21 64<br>
                <br>
                ______________________________<wbr>_________________<br>
                mpls mailing list<br>
                <a href="mailto:mpls@ietf.org" target="_blank"
                  moz-do-not-send="true">mpls@ietf.org</a><br>
                <a href="https://www.ietf.org/mailman/listinfo/mpls"
                  rel="noreferrer" target="_blank"
                  moz-do-not-send="true">https://www.ietf.org/mailman/l<wbr>istinfo/mpls</a><br>
              </font></span></blockquote>
        </div>
        <br>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
spring mailing list
<a class="moz-txt-link-abbreviated" href="mailto:spring@ietf.org">spring@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/spring">https://www.ietf.org/mailman/listinfo/spring</a>
</pre>
    </blockquote>
    <br>
  </body>
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To: Stewart Bryant <stewart.bryant@gmail.com>, "Andrew G. Malis" <agmalis@gmail.com>, Loa Andersson <loa@pi.nu>
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Thread-Topic: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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From: Eric Gray <eric.gray@ericsson.com>
To: Eric Gray <eric.gray@ericsson.com>, Stewart Bryant <stewart.bryant@gmail.com>, "Andrew G. Malis" <agmalis@gmail.com>, "Loa Andersson" <loa@pi.nu>
CC: "mpls@ietf.org" <mpls@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "mpls-ads@ietf.org" <mpls-ads@ietf.org>, "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>
Thread-Topic: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
Thread-Index: AQHT4hy3nBpUETEN9EO3oF7JnpeWQaQceAowgAANrbA=
Date: Wed, 2 May 2018 14:52:46 +0000
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Subject: Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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From nobody Wed May  2 07:58:53 2018
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To: Eric Gray <eric.gray@ericsson.com>, Stewart Bryant <stewart.bryant@gmail.com>, "Andrew G. Malis" <agmalis@gmail.com>
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From: Loa Andersson <loa@pi.nu>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/rI3WPy66a2_PkxuQp3JhjyuZAGA>
Subject: Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Eric, Stewart, wg,

Wouldn't just a few words in the draft saying something along the lines

"This document should not be interpreted in such a way that the ECMP
  behavior is limited to rely on EL only."

Go a long way to clarify Stewart's concerns?

/Loa

On 2018-05-02 16:52, Eric Gray wrote:
> Stewart, et al,
> 
>                  Loa just pointed out that I made a typo in the original 
> mail below.  In the second paragraph, I meant to say:
> 
>                  “Explicitly limiting ECMP behavior to …”
> 
> --
> 
> Eric
> 
> *From:*mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Eric Gray
> *Sent:* Wednesday, May 02, 2018 10:28 AM
> *To:* Stewart Bryant <stewart.bryant@gmail.com>; Andrew G. Malis 
> <agmalis@gmail.com>; Loa Andersson <loa@pi.nu>
> *Cc:* mpls@ietf.org; spring@ietf.org; mpls-ads@ietf.org; 
> draft-ietf-mpls-spring-entropy-label@ietf.org
> *Subject:* Re: [mpls] [spring] should 
> draft-ietf-mpls-spring-entropy-label be published as a RFC on the 
> standards track?
> 
> Stewart,
> 
>                  At least one view of the purpose of an Entropy label is 
> that it _/adds/_ entropy to the process of path selection.
> 
>                  Explicitly limiting EL behavior to rely exclusively on 
> use of the entropy label would also explicitly _/limit/_ the total 
> entropy to whatever the implementation that provided the entropy label 
> was implemented to treat as _/sufficient/_ among all paths in the ECMP 
> gestalt, possibly including branches that implementation might not know 
> about.
> 
>                  I doubt very much that many of the problems you refer 
> to would have arisen if folks generally felt that the entropy label – by 
> itself – provides sufficient entropy.
> 
>                  It might make sense to impose this restriction – 
> optionally – when a deployment occurs in which any particular 
> pathological behavior might be expected to occur.
> 
>                  In that case, it might be very important to ensure that 
> the limited approaches available for maximizing efficient load 
> distribution via explicit and exclusive use of the entropy label are 
> acceptable to a reasonably diverse set of implementers, as support for 
> at least one of those approaches would then become a mandatory part of 
> every standard implementation.
> 
>                  Even so, I don’t believe it is a good idea to restrict 
> implementations from using other approaches in every case.
> 
>                  The simplest example possible (where doing so is a big 
> problem) is one where the entropy labels provided have N possible 
> values  and there are M possible paths, where M>N. In any scenario where 
> this occurs, M-N paths simply will not be used.
> 
> --
> 
> Eric
> 
> *From:*mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Stewart Bryant
> *Sent:* Wednesday, May 02, 2018 9:52 AM
> *To:* Andrew G. Malis <agmalis@gmail.com <mailto:agmalis@gmail.com>>; 
> Loa Andersson <loa@pi.nu <mailto:loa@pi.nu>>
> *Cc:* mpls@ietf.org <mailto:mpls@ietf.org>; spring@ietf.org 
> <mailto:spring@ietf.org>; mpls-ads@ietf.org <mailto:mpls-ads@ietf.org>; 
> draft-ietf-mpls-spring-entropy-label@ietf.org 
> <mailto:draft-ietf-mpls-spring-entropy-label@ietf.org>
> *Subject:* Re: [mpls] [spring] should 
> draft-ietf-mpls-spring-entropy-label be published as a RFC on the 
> standards track?
> 
> Be careful.
> 
> There is text in the draft that talks about ECMP behaviour in different 
> parts of the path, which implies an expectation that the EL is the sole 
> source of entropy. If we make this ST then we will be implicitly 
> standardizing that behaviour. Now as it happens, I thing we need to 
> update the EL behaviour to make it the sole source of entropy, because 
> that solves a number of problems, particularly in network 
> instrumentation, but we need to do that explicitly and not as an 
> artefact of this draft.
> 
> So the way I see it, either this draft is published as informational, or 
> it is published as ST without any text that implies that the EL is the 
> sole source of entropy, or we harden the EL behaviour (which I think we 
> need to do) and this draft is published with a normative reference to an 
> RFC that specifies the stricter EL behaviour.
> 
> - Stewart
> 
> On 02/05/2018 14:01, Andrew G. Malis wrote:
> 
>     Loa,
> 
>     There’s plenty of RFC 2119 language in the draft, so I support
>     making this standards track.
> 
>     Cheers,
> 
>     Andy
> 
>     On Wed, May 2, 2018 at 3:44 AM, Loa Andersson <loa@pi.nu
>     <mailto:loa@pi.nu>> wrote:
> 
>         Working Group,
> 
>         February 1st the MPLS working Group requested that draft-ietf-mpls-
>         spring-entropy-label should be published as an Informational RFC.
> 
>         During the RTG Directorate and AD reviews the question whether the
>         document should instead be published as a RFC on the Standards Track
>         has been raised.
> 
>         The decision to make the document Informational was taken "a
>         long time
>         ago", based on discussions between the authors and involving the
>         document shepherd, on the wg mailing list. At that point it we were
>         convinced that the document should be progressed as an Informational
>         document.
> 
>         It turns out that there has been such changes to the document
>         that we
>         now would like to request input from the working group if we
>         should make
>         the document a Standards Track RFC.
> 
>         Daniele's RTG Directorate review can be found at at:
>         https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/
> 
>         All the issues, with the exception whether it should be
>         Informational
>         or Standards track, has been resolved as part AD review.
> 
>         If the document is progressed as a Standard Tracks document then we
>         also need to answer the question whether this is an update RFC 6790.
> 
>         This mail starts a one week poll (ending May 9) to see if we have
>         support to make the document a Standards Track document. If you
>         support
>         placing it on the Standards Track also consider if it is an
>         update to
>         RFC 6790.
> 
>         Please send your comments to the MPLS wg mailing list (
>         mpls@ietf.org <mailto:mpls@ietf.org> ).
> 
>         /Loa
>         for the mpls wf co-chairs
> 
>         PS
> 
>         I'm copying the spring working group on this mail.
>         -- 
> 
> 
>         Loa Andersson                        email: loa@pi.nu
>         <mailto:loa@pi.nu>
>         Senior MPLS Expert
>         Bronze Dragon Consulting             phone: +46 739 81 21 64
> 
>         _______________________________________________
>         mpls mailing list
>         mpls@ietf.org <mailto:mpls@ietf.org>
>         https://www.ietf.org/mailman/listinfo/mpls
> 
> 
> 
>     _______________________________________________
> 
>     spring mailing list
> 
>     spring@ietf.org <mailto:spring@ietf.org>
> 
>     https://www.ietf.org/mailman/listinfo/spring
> 

-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Bronze Dragon Consulting             phone: +46 739 81 21 64


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From: John E Drake <jdrake@juniper.net>
To: Eric Gray <eric.gray@ericsson.com>, Stewart Bryant <stewart.bryant@gmail.com>, "Andrew G. Malis" <agmalis@gmail.com>, Loa Andersson <loa@pi.nu>
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Thread-Topic: [spring] [mpls] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Subject: Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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From: Rob Shakir <robjs@google.com>
Date: Wed, 02 May 2018 15:15:31 +0000
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To: John E Drake <jdrake@juniper.net>
Cc: Eric Gray <eric.gray@ericsson.com>, Stewart Bryant <stewart.bryant@gmail.com>,  "Andrew G. Malis" <agmalis@gmail.com>, Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>,  "spring@ietf.org" <spring@ietf.org>, "mpls-ads@ietf.org" <mpls-ads@ietf.org>,  "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/ZKKGsuGYEuLHo6GLHP5vj_e0Ezg>
Subject: Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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I agree with adding such a statement here if this document should be
standards track. It's not clear to me that such an implication is intended
by the draft.

r.

On Wed, May 2, 2018 at 8:04 AM John E Drake <jdrake@juniper.net> wrote:

> Stewart,
>
>
>
> Realistically, I think your proposal is an example of closing the barn
> door after the horse has bolted.
>
>
>
> Yours Irrespectively,
>
>
>
> John
>
>
>
> *From:* spring <spring-bounces@ietf.org> *On Behalf Of *Eric Gray
> *Sent:* Wednesday, May 2, 2018 10:28 AM
> *To:* Stewart Bryant <stewart.bryant@gmail.com>; Andrew G. Malis <
> agmalis@gmail.com>; Loa Andersson <loa@pi.nu>
>
>
> *Cc:* mpls@ietf.org; spring@ietf.org; mpls-ads@ietf.org;
> draft-ietf-mpls-spring-entropy-label@ietf.org
>
> *Subject:* Re: [spring] [mpls] should
> draft-ietf-mpls-spring-entropy-label be published as a RFC on the standar=
ds
> track?
>
>
>
> Stewart,
>
>
>
>                 At least one view of the purpose of an Entropy label is
> that it _*adds*_ entropy to the process of path selection.
>
>
>
>                 Explicitly limiting EL behavior to rely exclusively on us=
e
> of the entropy label would also explicitly _*limit*_ the total entropy to
> whatever the implementation that provided the entropy label was implement=
ed
> to treat as _*sufficient*_ among all paths in the ECMP gestalt, possibly
> including branches that implementation might not know about.
>
>
>
>                 I doubt very much that many of the problems you refer to
> would have arisen if folks generally felt that the entropy label =E2=80=
=93 by
> itself =E2=80=93 provides sufficient entropy.
>
>
>
>                 It might make sense to impose this restriction =E2=80=93
> optionally =E2=80=93 when a deployment occurs in which any particular pat=
hological
> behavior might be expected to occur.
>
>
>
>                 In that case, it might be very important to ensure that
> the limited approaches available for maximizing efficient load distributi=
on
> via explicit and exclusive use of the entropy label are acceptable to a
> reasonably diverse set of implementers, as support for at least one of
> those approaches would then become a mandatory part of every standard
> implementation.
>
>
>
>                 Even so, I don=E2=80=99t believe it is a good idea to res=
trict
> implementations from using other approaches in every case.
>
>
>
>                 The simplest example possible (where doing so is a big
> problem) is one where the entropy labels provided have N possible values
> and there are M possible paths, where M>N. In any scenario where this
> occurs, M-N paths simply will not be used.
>
>
>
> --
>
> Eric
>
>
>
> *From:* mpls [mailto:mpls-bounces@ietf.org <mpls-bounces@ietf.org>] *On
> Behalf Of *Stewart Bryant
> *Sent:* Wednesday, May 02, 2018 9:52 AM
> *To:* Andrew G. Malis <agmalis@gmail.com>; Loa Andersson <loa@pi.nu>
> *Cc:* mpls@ietf.org; spring@ietf.org; mpls-ads@ietf.org;
> draft-ietf-mpls-spring-entropy-label@ietf.org
> *Subject:* Re: [mpls] [spring] should
> draft-ietf-mpls-spring-entropy-label be published as a RFC on the standar=
ds
> track?
>
>
>
> Be careful.
>
> There is text in the draft that talks about ECMP behaviour in different
> parts of the path, which implies an expectation that the EL is the sole
> source of entropy. If we make this ST then we will be implicitly
> standardizing that behaviour. Now as it happens, I thing we need to updat=
e
> the EL behaviour to make it the sole source of entropy, because that solv=
es
> a number of problems, particularly in network instrumentation, but we nee=
d
> to do that explicitly and not as an artefact of this draft.
>
> So the way I see it, either this draft is published as informational, or
> it is published as ST without any text that implies that the EL is the so=
le
> source of entropy, or we harden the EL behaviour (which I think we need t=
o
> do) and this draft is published with a normative reference to an RFC that
> specifies the stricter EL behaviour.
>
> - Stewart
>
>
>
> On 02/05/2018 14:01, Andrew G. Malis wrote:
>
> Loa,
>
>
>
> There=E2=80=99s plenty of RFC 2119 language in the draft, so I support ma=
king this
> standards track.
>
>
>
> Cheers,
>
> Andy
>
>
>
>
>
> On Wed, May 2, 2018 at 3:44 AM, Loa Andersson <loa@pi.nu> wrote:
>
> Working Group,
>
> February 1st the MPLS working Group requested that draft-ietf-mpls-
> spring-entropy-label should be published as an Informational RFC.
>
> During the RTG Directorate and AD reviews the question whether the
> document should instead be published as a RFC on the Standards Track
> has been raised.
>
> The decision to make the document Informational was taken "a long time
> ago", based on discussions between the authors and involving the
> document shepherd, on the wg mailing list. At that point it we were
> convinced that the document should be progressed as an Informational
> document.
>
> It turns out that there has been such changes to the document that we
> now would like to request input from the working group if we should make
> the document a Standards Track RFC.
>
> Daniele's RTG Directorate review can be found at at:
>
> https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08=
-rtgdir-lc-ceccarelli-2018-02-21/
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatracker.ietf.=
org_doc_review-2Dietf-2Dmpls-2Dspring-2Dentropy-2Dlabel-2D08-2Drtgdir-2Dlc-=
2Dceccarelli-2D2018-2D02-2D21_&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-n=
db3voDTXcWzoCI&r=3DCRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&m=3D7_r3cJDG=
9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&s=3D8uWamWCicXKfKdzVgZT8gX3j8YO9Yo2Eb3m=
ZxOCMNnI&e=3D>
>
> All the issues, with the exception whether it should be Informational
> or Standards track, has been resolved as part AD review.
>
> If the document is progressed as a Standard Tracks document then we
> also need to answer the question whether this is an update RFC 6790.
>
> This mail starts a one week poll (ending May 9) to see if we have
> support to make the document a Standards Track document. If you support
> placing it on the Standards Track also consider if it is an update to
> RFC 6790.
>
> Please send your comments to the MPLS wg mailing list ( mpls@ietf.org ).
>
> /Loa
> for the mpls wf co-chairs
>
> PS
>
> I'm copying the spring working group on this mail.
> --
>
>
> Loa Andersson                        email: loa@pi.nu
> Senior MPLS Expert
> Bronze Dragon Consulting             phone: +46 739 81 21 64
>
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls
> <https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mail=
man_listinfo_mpls&d=3DDwMGaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoC=
I&r=3DCRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&m=3D7_r3cJDG9p57NRbEtEFwA=
yBK-8a5dmfxyolD2L0t-NY&s=3D7zu_z-7g4wBIOav02jUg5eWNVpu_UbyFhy3Ea7r7wKA&e=3D=
>
>
>
>
>
>
> _______________________________________________
>
> spring mailing list
>
> spring@ietf.org
>
> https://www.ietf.org/mailman/listinfo/spring <https://urldefense.proofpoi=
nt.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailman_listinfo_spring&d=3DDwMGaQ=
&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DCRB2tJiQePk0cT-h5LGhEW=
H-s_xXXup3HzvBSMRj5VE&m=3D7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&s=3DB=
re3I6DpvXPKYT12vpNTyKEsnhA6jqbAP4Pc59KLc3c&e=3D>
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--0000000000006acb31056b3a8f01
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">I agree with adding such a statement here if this document=
 should be standards track. It&#39;s not clear to me that such an implicati=
on is intended by the draft.<div><br></div><div>r.</div></div><br><div clas=
s=3D"gmail_quote"><div dir=3D"ltr">On Wed, May 2, 2018 at 8:04 AM John E Dr=
ake &lt;<a href=3D"mailto:jdrake@juniper.net">jdrake@juniper.net</a>&gt; wr=
ote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">





<div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-7339806995996779205WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Stewart,<u></u><u></u>=
</span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Realistically, I think=
 your proposal is an example of closing the barn door after the horse has b=
olted.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Yours Irrespectively,<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">John<u></u><u></u></sp=
an></p>
</div>
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></=
span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> spring &lt;<a href=3D"mailto:spring-bounc=
es@ietf.org" target=3D"_blank">spring-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Eric Gray<br>
<b>Sent:</b> Wednesday, May 2, 2018 10:28 AM<br>
<b>To:</b> Stewart Bryant &lt;<a href=3D"mailto:stewart.bryant@gmail.com" t=
arget=3D"_blank">stewart.bryant@gmail.com</a>&gt;; Andrew G. Malis &lt;<a h=
ref=3D"mailto:agmalis@gmail.com" target=3D"_blank">agmalis@gmail.com</a>&gt=
;; Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@pi.=
nu</a>&gt;</span></p></div></div></div></div></div><div bgcolor=3D"white" l=
ang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div class=3D"m_-7339806995996=
779205WordSection1"><div style=3D"border:none;border-left:solid blue 1.5pt;=
padding:0in 0in 0in 4.0pt"><div><div style=3D"border:none;border-top:solid =
#e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in"><p class=3D"MsoNormal"><span style=
=3D"color:windowtext"><br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org=
</a>; <a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org<=
/a>; <a href=3D"mailto:mpls-ads@ietf.org" target=3D"_blank">mpls-ads@ietf.o=
rg</a>; <a href=3D"mailto:draft-ietf-mpls-spring-entropy-label@ietf.org" ta=
rget=3D"_blank">draft-ietf-mpls-spring-entropy-label@ietf.org</a><br>
</span></p></div></div></div></div></div><div bgcolor=3D"white" lang=3D"EN-=
US" link=3D"blue" vlink=3D"purple"><div class=3D"m_-7339806995996779205Word=
Section1"><div style=3D"border:none;border-left:solid blue 1.5pt;padding:0i=
n 0in 0in 4.0pt"><div><div style=3D"border:none;border-top:solid #e1e1e1 1.=
0pt;padding:3.0pt 0in 0in 0in"><p class=3D"MsoNormal"><span style=3D"color:=
windowtext"><b>Subject:</b> Re: [spring] [mpls] should draft-ietf-mpls-spri=
ng-entropy-label be published as a RFC on the standards track?<u></u><u></u=
></span></p>
</div>
</div></div></div></div><div bgcolor=3D"white" lang=3D"EN-US" link=3D"blue"=
 vlink=3D"purple"><div class=3D"m_-7339806995996779205WordSection1"><div st=
yle=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Stewart,<u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 At=
 least one view of the purpose of an Entropy label is that it _<i>adds</i>_=
 entropy to the process of path selection.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Ex=
plicitly limiting EL behavior to rely exclusively on use of the entropy lab=
el would also explicitly _<i>limit</i>_ the total entropy to whatever the i=
mplementation that provided the entropy
 label was implemented to treat as _<i>sufficient</i>_ among all paths in t=
he ECMP gestalt, possibly including branches that implementation might not =
know about.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 I =
doubt very much that many of the problems you refer to would have arisen if=
 folks generally felt that the entropy label =E2=80=93 by itself =E2=80=93 =
provides sufficient entropy.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 It=
 might make sense to impose this restriction =E2=80=93 optionally =E2=80=93=
 when a deployment occurs in which any particular pathological behavior mig=
ht be expected to occur.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 In=
 that case, it might be very important to ensure that the limited approache=
s available for maximizing efficient load distribution via explicit and exc=
lusive use of the entropy label are acceptable
 to a reasonably diverse set of implementers, as support for at least one o=
f those approaches would then become a mandatory part of every standard imp=
lementation.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Ev=
en so, I don=E2=80=99t believe it is a good idea to restrict implementation=
s from using other approaches in every case.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Th=
e simplest example possible (where doing so is a big problem) is one where =
the entropy labels provided have N possible values=C2=A0 and there are M po=
ssible paths, where M&gt;N. In any scenario where
 this occurs, M-N paths simply will not be used.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">--<u></u><u></u></s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext">Eric<u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"color:windowtext"><u></u>=C2=A0<u></u=
></span></p>
<div>
<div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"color:windowtext">From:</span></b>=
<span style=3D"color:windowtext"> mpls [<a href=3D"mailto:mpls-bounces@ietf=
.org" target=3D"_blank">mailto:mpls-bounces@ietf.org</a>]
<b>On Behalf Of </b>Stewart Bryant<br>
<b>Sent:</b> Wednesday, May 02, 2018 9:52 AM<br>
<b>To:</b> Andrew G. Malis &lt;<a href=3D"mailto:agmalis@gmail.com" target=
=3D"_blank">agmalis@gmail.com</a>&gt;; Loa Andersson &lt;<a href=3D"mailto:=
loa@pi.nu" target=3D"_blank">loa@pi.nu</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org=
</a>; <a href=3D"mailto:spring@ietf.org" target=3D"_blank">
spring@ietf.org</a>; <a href=3D"mailto:mpls-ads@ietf.org" target=3D"_blank"=
>mpls-ads@ietf.org</a>; <a href=3D"mailto:draft-ietf-mpls-spring-entropy-la=
bel@ietf.org" target=3D"_blank">
draft-ietf-mpls-spring-entropy-label@ietf.org</a><br>
<b>Subject:</b> Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-l=
abel be published as a RFC on the standards track?<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p>Be careful.<u></u><u></u></p>
<p>There is text in the draft that talks about ECMP behaviour in different =
parts of the path, which implies an expectation that the EL is the sole sou=
rce of entropy. If we make this ST then we will be implicitly standardizing=
 that behaviour. Now as it happens,
 I thing we need to update the EL behaviour to make it the sole source of e=
ntropy, because that solves a number of problems, particularly in network i=
nstrumentation, but we need to do that explicitly and not as an artefact of=
 this draft.<u></u><u></u></p>
<p>So the way I see it, either this draft is published as informational, or=
 it is published as ST without any text that implies that the EL is the sol=
e source of entropy, or we harden the EL behaviour (which I think we need t=
o do) and this draft is published
 with a normative reference to an RFC that specifies the stricter EL behavi=
our.<u></u><u></u></p>
<p>- Stewart<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On 02/05/2018 14:01, Andrew G. Malis wrote:<u></u><u=
></u></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">Loa, <u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">There=E2=80=99s plenty of RFC 2119 language in the d=
raft, so I support making this standards track.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Andy<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, May 2, 2018 at 3:44 AM, Loa Andersson &lt;<a=
 href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@pi.nu</a>&gt; wrote:<u></u=
><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-=
bottom:5.0pt">
<p class=3D"MsoNormal">Working Group,<br>
<br>
February 1st the MPLS working Group requested that draft-ietf-mpls-<br>
spring-entropy-label should be published as an Informational RFC.<br>
<br>
During the RTG Directorate and AD reviews the question whether the<br>
document should instead be published as a RFC on the Standards Track<br>
has been raised.<br>
<br>
The decision to make the document Informational was taken &quot;a long time=
<br>
ago&quot;, based on discussions between the authors and involving the<br>
document shepherd, on the wg mailing list. At that point it we were<br>
convinced that the document should be progressed as an Informational<br>
document.<br>
<br>
It turns out that there has been such changes to the document that we<br>
now would like to request input from the working group if we should make<br=
>
the document a Standards Track RFC.<br>
<br>
Daniele&#39;s RTG Directorate review can be found at at:<br>
<a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__datatrack=
er.ietf.org_doc_review-2Dietf-2Dmpls-2Dspring-2Dentropy-2Dlabel-2D08-2Drtgd=
ir-2Dlc-2Dceccarelli-2D2018-2D02-2D21_&amp;d=3DDwMGaQ&amp;c=3DHAkYuh63rsuhr=
6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DCRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvB=
SMRj5VE&amp;m=3D7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&amp;s=3D8uWamWC=
icXKfKdzVgZT8gX3j8YO9Yo2Eb3mZxOCMNnI&amp;e=3D" target=3D"_blank">https://da=
tatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-c=
eccarelli-2018-02-21/</a><br>
<br>
All the issues, with the exception whether it should be Informational<br>
or Standards track, has been resolved as part AD review.<br>
<br>
If the document is progressed as a Standard Tracks document then we<br>
also need to answer the question whether this is an update RFC 6790.<br>
<br>
This mail starts a one week poll (ending May 9) to see if we have<br>
support to make the document a Standards Track document. If you support<br>
placing it on the Standards Track also consider if it is an update to<br>
RFC 6790.<br>
<br>
Please send your comments to the MPLS wg mailing list ( <a href=3D"mailto:m=
pls@ietf.org" target=3D"_blank">
mpls@ietf.org</a> ).<br>
<br>
/Loa<br>
for the mpls wf co-chairs<br>
<br>
PS<br>
<br>
I&#39;m copying the spring working group on this mail.<span style=3D"color:=
#888888"><br>
<span class=3D"m_-7339806995996779205hoenzb">-- </span><br>
<br>
<br>
<span class=3D"m_-7339806995996779205hoenzb">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@pi.nu" target=3D"_blank">
loa@pi.nu</a></span><br>
<span class=3D"m_-7339806995996779205hoenzb">Senior MPLS Expert</span><br>
<span class=3D"m_-7339806995996779205hoenzb">Bronze Dragon Consulting=C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0phone: +46 739 81 21 64</span><br=
>
<br>
<span class=3D"m_-7339806995996779205hoenzb">______________________________=
_________________</span><br>
<span class=3D"m_-7339806995996779205hoenzb">mpls mailing list</span><br>
<span class=3D"m_-7339806995996779205hoenzb"><a href=3D"mailto:mpls@ietf.or=
g" target=3D"_blank">mpls@ietf.org</a></span><br>
<span class=3D"m_-7339806995996779205hoenzb"><a href=3D"https://urldefense.=
proofpoint.com/v2/url?u=3Dhttps-3A__www.ietf.org_mailman_listinfo_mpls&amp;=
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To: John E Drake <jdrake@juniper.net>, Eric Gray <eric.gray@ericsson.com>, "Andrew G. Malis" <agmalis@gmail.com>, Loa Andersson <loa@pi.nu>
Cc: "mpls@ietf.org" <mpls@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "mpls-ads@ietf.org" <mpls-ads@ietf.org>, "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>
References: <a3dbc94b-061c-8eb8-7302-3a60f3db4a3f@pi.nu> <CAA=duU3Xc3BvYT1cmVN97vsEYQMsmm6kGqZaibuGOr6QrX42_w@mail.gmail.com> <c8b84f45-80a8-a79f-acd7-0c3b54d0765e@gmail.com> <48E1A67CB9CA044EADFEAB87D814BFF64BA5F0DE@eusaamb107.ericsson.se> <CO2PR0501MB9022E7A5C7B89A423F20B28C7800@CO2PR0501MB902.namprd05.prod.outlook.com>
From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Wed, 2 May 2018 16:50:46 +0100
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Subject: Re: [mpls] [spring] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Well, yes and no.

Presumably routers know what they are load balancing on and can report 
that to the control & management plane, a path can be chosen that 
explicitly takes a path based on the desired behaviour.

Also presumably if there is a need, the ECMP behaviour could be modified 
to only use the EL.

My big concern is that there are a number of instrumentation (and maybe 
path construction) cases where we really would like to see EL only ECMP.

- Stewart


On 02/05/2018 16:03, John E Drake wrote:
>
> Stewart,
>
> Realistically, I think your proposal is an example of closing the barn 
> door after the horse has bolted.
>
> Yours Irrespectively,
>
> John
>
> *From:*spring <spring-bounces@ietf.org> *On Behalf Of *Eric Gray
> *Sent:* Wednesday, May 2, 2018 10:28 AM
> *To:* Stewart Bryant <stewart.bryant@gmail.com>; Andrew G. Malis 
> <agmalis@gmail.com>; Loa Andersson <loa@pi.nu>
> *Cc:* mpls@ietf.org; spring@ietf.org; mpls-ads@ietf.org; 
> draft-ietf-mpls-spring-entropy-label@ietf.org
> *Subject:* Re: [spring] [mpls] should 
> draft-ietf-mpls-spring-entropy-label be published as a RFC on the 
> standards track?
>
> Stewart,
>
> At least one view of the purpose of an Entropy label is that it 
> _/adds/_ entropy to the process of path selection.
>
> Explicitly limiting EL behavior to rely exclusively on use of the 
> entropy label would also explicitly _/limit/_ the total entropy to 
> whatever the implementation that provided the entropy label was 
> implemented to treat as _/sufficient/_ among all paths in the ECMP 
> gestalt, possibly including branches that implementation might not 
> know about.
>
> I doubt very much that many of the problems you refer to would have 
> arisen if folks generally felt that the entropy label – by itself – 
> provides sufficient entropy.
>
> It might make sense to impose this restriction – optionally – when a 
> deployment occurs in which any particular pathological behavior might 
> be expected to occur.
>
> In that case, it might be very important to ensure that the limited 
> approaches available for maximizing efficient load distribution via 
> explicit and exclusive use of the entropy label are acceptable to a 
> reasonably diverse set of implementers, as support for at least one of 
> those approaches would then become a mandatory part of every standard 
> implementation.
>
> Even so, I don’t believe it is a good idea to restrict implementations 
> from using other approaches in every case.
>
> The simplest example possible (where doing so is a big problem) is one 
> where the entropy labels provided have N possible values  and there 
> are M possible paths, where M>N. In any scenario where this occurs, 
> M-N paths simply will not be used.
>
> --
>
> Eric
>
> *From:*mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Stewart Bryant
> *Sent:* Wednesday, May 02, 2018 9:52 AM
> *To:* Andrew G. Malis <agmalis@gmail.com <mailto:agmalis@gmail.com>>; 
> Loa Andersson <loa@pi.nu <mailto:loa@pi.nu>>
> *Cc:* mpls@ietf.org <mailto:mpls@ietf.org>; spring@ietf.org 
> <mailto:spring@ietf.org>; mpls-ads@ietf.org 
> <mailto:mpls-ads@ietf.org>; 
> draft-ietf-mpls-spring-entropy-label@ietf.org 
> <mailto:draft-ietf-mpls-spring-entropy-label@ietf.org>
> *Subject:* Re: [mpls] [spring] should 
> draft-ietf-mpls-spring-entropy-label be published as a RFC on the 
> standards track?
>
> Be careful.
>
> There is text in the draft that talks about ECMP behaviour in 
> different parts of the path, which implies an expectation that the EL 
> is the sole source of entropy. If we make this ST then we will be 
> implicitly standardizing that behaviour. Now as it happens, I thing we 
> need to update the EL behaviour to make it the sole source of entropy, 
> because that solves a number of problems, particularly in network 
> instrumentation, but we need to do that explicitly and not as an 
> artefact of this draft.
>
> So the way I see it, either this draft is published as informational, 
> or it is published as ST without any text that implies that the EL is 
> the sole source of entropy, or we harden the EL behaviour (which I 
> think we need to do) and this draft is published with a normative 
> reference to an RFC that specifies the stricter EL behaviour.
>
> - Stewart
>
> On 02/05/2018 14:01, Andrew G. Malis wrote:
>
>     Loa,
>
>     There’s plenty of RFC 2119 language in the draft, so I support
>     making this standards track.
>
>     Cheers,
>
>     Andy
>
>     On Wed, May 2, 2018 at 3:44 AM, Loa Andersson <loa@pi.nu
>     <mailto:loa@pi.nu>> wrote:
>
>         Working Group,
>
>         February 1st the MPLS working Group requested that
>         draft-ietf-mpls-
>         spring-entropy-label should be published as an Informational RFC.
>
>         During the RTG Directorate and AD reviews the question whether the
>         document should instead be published as a RFC on the Standards
>         Track
>         has been raised.
>
>         The decision to make the document Informational was taken "a
>         long time
>         ago", based on discussions between the authors and involving the
>         document shepherd, on the wg mailing list. At that point it we
>         were
>         convinced that the document should be progressed as an
>         Informational
>         document.
>
>         It turns out that there has been such changes to the document
>         that we
>         now would like to request input from the working group if we
>         should make
>         the document a Standards Track RFC.
>
>         Daniele's RTG Directorate review can be found at at:
>         https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/
>         <https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_review-2Dietf-2Dmpls-2Dspring-2Dentropy-2Dlabel-2D08-2Drtgdir-2Dlc-2Dceccarelli-2D2018-2D02-2D21_&d=DwMGaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=CRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&m=7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&s=8uWamWCicXKfKdzVgZT8gX3j8YO9Yo2Eb3mZxOCMNnI&e=>
>
>         All the issues, with the exception whether it should be
>         Informational
>         or Standards track, has been resolved as part AD review.
>
>         If the document is progressed as a Standard Tracks document
>         then we
>         also need to answer the question whether this is an update RFC
>         6790.
>
>         This mail starts a one week poll (ending May 9) to see if we have
>         support to make the document a Standards Track document. If
>         you support
>         placing it on the Standards Track also consider if it is an
>         update to
>         RFC 6790.
>
>         Please send your comments to the MPLS wg mailing list (
>         mpls@ietf.org <mailto:mpls@ietf.org> ).
>
>         /Loa
>         for the mpls wf co-chairs
>
>         PS
>
>         I'm copying the spring working group on this mail.
>         -- 
>
>
>         Loa Andersson         email: loa@pi.nu <mailto:loa@pi.nu>
>         Senior MPLS Expert
>         Bronze Dragon Consulting        phone: +46 739 81 21 64
>
>         _______________________________________________
>         mpls mailing list
>         mpls@ietf.org <mailto:mpls@ietf.org>
>         https://www.ietf.org/mailman/listinfo/mpls
>         <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_mpls&d=DwMGaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=CRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&m=7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&s=7zu_z-7g4wBIOav02jUg5eWNVpu_UbyFhy3Ea7r7wKA&e=>
>
>
>
>     _______________________________________________
>
>     spring mailing list
>
>     spring@ietf.org <mailto:spring@ietf.org>
>
>     https://www.ietf.org/mailman/listinfo/spring
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_spring&d=DwMGaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=CRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&m=7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&s=Bre3I6DpvXPKYT12vpNTyKEsnhA6jqbAP4Pc59KLc3c&e=>
>


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    <p><br>
    </p>
    <p>Well, yes and no.</p>
    <p>Presumably routers know what they are load balancing on and can
      report that to the control &amp; management plane, a path can be
      chosen that explicitly takes a path based on the desired
      behaviour.</p>
    <p>Also presumably if there is a need, the ECMP behaviour could be
      modified to only use the EL.</p>
    <p>My big concern is that there are a number of instrumentation (and
      maybe path construction) cases where we really would like to see
      EL only ECMP.</p>
    <p>- Stewart<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 02/05/2018 16:03, John E Drake
      wrote:<br>
    </div>
    <blockquote type="cite"
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        <p class="MsoNormal"><span style="color:#1F497D">Stewart,<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Realistically,
            I think your proposal is an example of closing the barn door
            after the horse has bolted.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <p class="MsoNormal"><span style="color:#1F497D">Yours
              Irrespectively,<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:#1F497D">John<o:p></o:p></span></p>
        </div>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <div style="border:none;border-left:solid blue 1.5pt;padding:0in
          0in 0in 4.0pt">
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span
                  style="color:windowtext"> spring
                  <a class="moz-txt-link-rfc2396E" href="mailto:spring-bounces@ietf.org">&lt;spring-bounces@ietf.org&gt;</a>
                  <b>On Behalf Of </b>Eric Gray<br>
                  <b>Sent:</b> Wednesday, May 2, 2018 10:28 AM<br>
                  <b>To:</b> Stewart Bryant
                  <a class="moz-txt-link-rfc2396E" href="mailto:stewart.bryant@gmail.com">&lt;stewart.bryant@gmail.com&gt;</a>; Andrew G. Malis
                  <a class="moz-txt-link-rfc2396E" href="mailto:agmalis@gmail.com">&lt;agmalis@gmail.com&gt;</a>; Loa Andersson
                  <a class="moz-txt-link-rfc2396E" href="mailto:loa@pi.nu">&lt;loa@pi.nu&gt;</a><br>
                  <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:mpls@ietf.org">mpls@ietf.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:spring@ietf.org">spring@ietf.org</a>;
                  <a class="moz-txt-link-abbreviated" href="mailto:mpls-ads@ietf.org">mpls-ads@ietf.org</a>;
                  <a class="moz-txt-link-abbreviated" href="mailto:draft-ietf-mpls-spring-entropy-label@ietf.org">draft-ietf-mpls-spring-entropy-label@ietf.org</a><br>
                  <b>Subject:</b> Re: [spring] [mpls] should
                  draft-ietf-mpls-spring-entropy-label be published as a
                  RFC on the standards track?<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal"><span style="color:windowtext">Stewart,<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">               
              At least one view of the purpose of an Entropy label is
              that it _<i>adds</i>_ entropy to the process of path
              selection.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">               
              Explicitly limiting EL behavior to rely exclusively on use
              of the entropy label would also explicitly _<i>limit</i>_
              the total entropy to whatever the implementation that
              provided the entropy label was implemented to treat as _<i>sufficient</i>_
              among all paths in the ECMP gestalt, possibly including
              branches that implementation might not know about.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">               
              I doubt very much that many of the problems you refer to
              would have arisen if folks generally felt that the entropy
              label – by itself – provides sufficient entropy.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">               
              It might make sense to impose this restriction –
              optionally – when a deployment occurs in which any
              particular pathological behavior might be expected to
              occur.
              <o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">               
              In that case, it might be very important to ensure that
              the limited approaches available for maximizing efficient
              load distribution via explicit and exclusive use of the
              entropy label are acceptable to a reasonably diverse set
              of implementers, as support for at least one of those
              approaches would then become a mandatory part of every
              standard implementation.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">               
              Even so, I don’t believe it is a good idea to restrict
              implementations from using other approaches in every case.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">               
              The simplest example possible (where doing so is a big
              problem) is one where the entropy labels provided have N
              possible values  and there are M possible paths, where
              M&gt;N. In any scenario where this occurs, M-N paths
              simply will not be used.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">--<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext">Eric<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
          <div>
            <div style="border:none;border-top:solid #E1E1E1
              1.0pt;padding:3.0pt 0in 0in 0in">
              <p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span
                  style="color:windowtext"> mpls [<a
                    href="mailto:mpls-bounces@ietf.org"
                    moz-do-not-send="true">mailto:mpls-bounces@ietf.org</a>]
                  <b>On Behalf Of </b>Stewart Bryant<br>
                  <b>Sent:</b> Wednesday, May 02, 2018 9:52 AM<br>
                  <b>To:</b> Andrew G. Malis &lt;<a
                    href="mailto:agmalis@gmail.com"
                    moz-do-not-send="true">agmalis@gmail.com</a>&gt;;
                  Loa Andersson &lt;<a href="mailto:loa@pi.nu"
                    moz-do-not-send="true">loa@pi.nu</a>&gt;<br>
                  <b>Cc:</b> <a href="mailto:mpls@ietf.org"
                    moz-do-not-send="true">mpls@ietf.org</a>; <a
                    href="mailto:spring@ietf.org" moz-do-not-send="true">
                    spring@ietf.org</a>; <a
                    href="mailto:mpls-ads@ietf.org"
                    moz-do-not-send="true">mpls-ads@ietf.org</a>; <a
                    href="mailto:draft-ietf-mpls-spring-entropy-label@ietf.org"
                    moz-do-not-send="true">
                    draft-ietf-mpls-spring-entropy-label@ietf.org</a><br>
                  <b>Subject:</b> Re: [mpls] [spring] should
                  draft-ietf-mpls-spring-entropy-label be published as a
                  RFC on the standards track?<o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p>Be careful.<o:p></o:p></p>
          <p>There is text in the draft that talks about ECMP behaviour
            in different parts of the path, which implies an expectation
            that the EL is the sole source of entropy. If we make this
            ST then we will be implicitly standardizing that behaviour.
            Now as it happens, I thing we need to update the EL
            behaviour to make it the sole source of entropy, because
            that solves a number of problems, particularly in network
            instrumentation, but we need to do that explicitly and not
            as an artefact of this draft.<o:p></o:p></p>
          <p>So the way I see it, either this draft is published as
            informational, or it is published as ST without any text
            that implies that the EL is the sole source of entropy, or
            we harden the EL behaviour (which I think we need to do) and
            this draft is published with a normative reference to an RFC
            that specifies the stricter EL behaviour.<o:p></o:p></p>
          <p>- Stewart<o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <div>
            <p class="MsoNormal">On 02/05/2018 14:01, Andrew G. Malis
              wrote:<o:p></o:p></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <p class="MsoNormal">Loa, <o:p></o:p></p>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal">There’s plenty of RFC 2119 language
                  in the draft, so I support making this standards
                  track.<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal">Cheers,<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal">Andy<o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal"><o:p> </o:p></p>
              </div>
            </div>
            <div>
              <p class="MsoNormal"><o:p> </o:p></p>
              <div>
                <p class="MsoNormal">On Wed, May 2, 2018 at 3:44 AM, Loa
                  Andersson &lt;<a href="mailto:loa@pi.nu"
                    target="_blank" moz-do-not-send="true">loa@pi.nu</a>&gt;
                  wrote:<o:p></o:p></p>
                <blockquote style="border:none;border-left:solid #CCCCCC
                  1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
                  <p class="MsoNormal">Working Group,<br>
                    <br>
                    February 1st the MPLS working Group requested that
                    draft-ietf-mpls-<br>
                    spring-entropy-label should be published as an
                    Informational RFC.<br>
                    <br>
                    During the RTG Directorate and AD reviews the
                    question whether the<br>
                    document should instead be published as a RFC on the
                    Standards Track<br>
                    has been raised.<br>
                    <br>
                    The decision to make the document Informational was
                    taken "a long time<br>
                    ago", based on discussions between the authors and
                    involving the<br>
                    document shepherd, on the wg mailing list. At that
                    point it we were<br>
                    convinced that the document should be progressed as
                    an Informational<br>
                    document.<br>
                    <br>
                    It turns out that there has been such changes to the
                    document that we<br>
                    now would like to request input from the working
                    group if we should make<br>
                    the document a Standards Track RFC.<br>
                    <br>
                    Daniele's RTG Directorate review can be found at at:<br>
                    <a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_review-2Dietf-2Dmpls-2Dspring-2Dentropy-2Dlabel-2D08-2Drtgdir-2Dlc-2Dceccarelli-2D2018-2D02-2D21_&amp;d=DwMGaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=CRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&amp;m=7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&amp;s=8uWamWCicXKfKdzVgZT8gX3j8YO9Yo2Eb3mZxOCMNnI&amp;e="
                      target="_blank" moz-do-not-send="true">https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/</a><br>
                    <br>
                    All the issues, with the exception whether it should
                    be Informational<br>
                    or Standards track, has been resolved as part AD
                    review.<br>
                    <br>
                    If the document is progressed as a Standard Tracks
                    document then we<br>
                    also need to answer the question whether this is an
                    update RFC 6790.<br>
                    <br>
                    This mail starts a one week poll (ending May 9) to
                    see if we have<br>
                    support to make the document a Standards Track
                    document. If you support<br>
                    placing it on the Standards Track also consider if
                    it is an update to<br>
                    RFC 6790.<br>
                    <br>
                    Please send your comments to the MPLS wg mailing
                    list ( <a href="mailto:mpls@ietf.org"
                      target="_blank" moz-do-not-send="true">
                      mpls@ietf.org</a> ).<br>
                    <br>
                    /Loa<br>
                    for the mpls wf co-chairs<br>
                    <br>
                    PS<br>
                    <br>
                    I'm copying the spring working group on this mail.<span
                      style="color:#888888"><br>
                      <span class="hoenzb">-- </span><br>
                      <br>
                      <br>
                      <span class="hoenzb">Loa Andersson               
                                email: <a href="mailto:loa@pi.nu"
                          target="_blank" moz-do-not-send="true">
                          loa@pi.nu</a></span><br>
                      <span class="hoenzb">Senior MPLS Expert</span><br>
                      <span class="hoenzb">Bronze Dragon Consulting     
                               phone: +46 739 81 21 64</span><br>
                      <br>
                      <span class="hoenzb">_______________________________________________</span><br>
                      <span class="hoenzb">mpls mailing list</span><br>
                      <span class="hoenzb"><a
                          href="mailto:mpls@ietf.org" target="_blank"
                          moz-do-not-send="true">mpls@ietf.org</a></span><br>
                      <span class="hoenzb"><a
href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_mpls&amp;d=DwMGaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=CRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&amp;m=7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&amp;s=7zu_z-7g4wBIOav02jUg5eWNVpu_UbyFhy3Ea7r7wKA&amp;e="
                          target="_blank" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/mpls</a></span></span><o:p></o:p></p>
                </blockquote>
              </div>
              <p class="MsoNormal"><o:p> </o:p></p>
            </div>
            <p class="MsoNormal" style="margin-bottom:12.0pt"><br>
              <br>
              <o:p></o:p></p>
            <pre>_______________________________________________<o:p></o:p></pre>
            <pre>spring mailing list<o:p></o:p></pre>
            <pre><a href="mailto:spring@ietf.org" moz-do-not-send="true">spring@ietf.org</a><o:p></o:p></pre>
            <pre><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_spring&amp;d=DwMGaQ&amp;c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=CRB2tJiQePk0cT-h5LGhEWH-s_xXXup3HzvBSMRj5VE&amp;m=7_r3cJDG9p57NRbEtEFwAyBK-8a5dmfxyolD2L0t-NY&amp;s=Bre3I6DpvXPKYT12vpNTyKEsnhA6jqbAP4Pc59KLc3c&amp;e=" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/spring</a><o:p></o:p></pre>
          </blockquote>
          <p class="MsoNormal"><o:p> </o:p></p>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

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From: Eric Gray <eric.gray@ericsson.com>
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Thread-Topic: [mpls] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Subject: Re: [mpls] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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From nobody Wed May  2 12:00:17 2018
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From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Wed, 2 May 2018 14:59:44 -0400
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To: Eric Gray <eric.gray@ericsson.com>
Cc: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  "mpls-ads@ietf.org" <mpls-ads@ietf.org>,  "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>
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Subject: Re: [mpls] should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Content-Type: text/plain; charset="UTF-8"
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Eric,

That=E2=80=99s a fair point, and a matter of interpretation of the draft. I=
t would
be more obvious that standards track was necessary if the draft defined new
message formats or TLVs on the wire, or if any requests were being made of
IANA. Neither is the case in this draft.

However, there is quite a bit of RFC 2119 language. That means that
interoperability requirements are being made of implementers of a
draft/RFC. An implementation MUST do the =E2=80=9CMUST=E2=80=9Ds, and so on=
, if they want
to play nicely with other implementations.

Informational status is great for documents like architectures, problem
statements, or to document how a particular vendor or operator did
something interesting. However, right in the abstract, this draft says
=E2=80=9CThis document examines and describes how ELs are to be applied to =
Segment
Routing MPLS.=E2=80=9D That, in combination with the RFC 2119 language, sou=
nds very
standards tracky, rather than informational, to me.

Cheers,
Andy


On Wed, May 2, 2018 at 2:23 PM, Eric Gray <eric.gray@ericsson.com> wrote:

> Andy,
>
>
>
>                 Don=E2=80=99t you feel that this is just a bit of a flip
> observation?
>
>
>
>                 Personally I agree that RFC 2119 =E2=80=9Clanguage=E2=80=
=9D and even a
> reference to RFC 2119 itself seems inappropriate in an =E2=80=9CFYI=E2=80=
=9D RFC.
>
>
>
>                 But I have been over-ridden on that before.
>
>
>
>                 I have to say, however that making something a standards
> track document _*because*_ it has RFC 2119 =E2=80=9Clanguage=E2=80=9D in =
it is a tad
> extreme.
>
>
>
>                 Know another RFC that has a lot of RFC 2119 =E2=80=9Clang=
uage=E2=80=9D in
> it that is not a standards track RFC?  RFC 2119=E2=80=A6
>
>
>
>                 =F0=9F=98=8A
>
>
>
> --
>
> Eric
>
>
>
> *From:* mpls [mailto:mpls-bounces@ietf.org] *On Behalf Of *Andrew G. Mali=
s
> *Sent:* Wednesday, May 02, 2018 9:01 AM
> *To:* Loa Andersson <loa@pi.nu>
> *Cc:* mpls@ietf.org; spring@ietf.org; mpls-ads@ietf.org;
> draft-ietf-mpls-spring-entropy-label@ietf.org
> *Subject:* Re: [mpls] should draft-ietf-mpls-spring-entropy-label be
> published as a RFC on the standards track?
>
>
>
> Loa,
>
>
>
> There=E2=80=99s plenty of RFC 2119 language in the draft, so I support ma=
king this
> standards track.
>
>
>
> Cheers,
>
> Andy
>
>
>
>
>
> On Wed, May 2, 2018 at 3:44 AM, Loa Andersson <loa@pi.nu> wrote:
>
> Working Group,
>
> February 1st the MPLS working Group requested that draft-ietf-mpls-
> spring-entropy-label should be published as an Informational RFC.
>
> During the RTG Directorate and AD reviews the question whether the
> document should instead be published as a RFC on the Standards Track
> has been raised.
>
> The decision to make the document Informational was taken "a long time
> ago", based on discussions between the authors and involving the
> document shepherd, on the wg mailing list. At that point it we were
> convinced that the document should be progressed as an Informational
> document.
>
> It turns out that there has been such changes to the document that we
> now would like to request input from the working group if we should make
> the document a Standards Track RFC.
>
> Daniele's RTG Directorate review can be found at at:
> https://datatracker.ietf.org/doc/review-ietf-mpls-spring-
> entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/
>
> All the issues, with the exception whether it should be Informational
> or Standards track, has been resolved as part AD review.
>
> If the document is progressed as a Standard Tracks document then we
> also need to answer the question whether this is an update RFC 6790.
>
> This mail starts a one week poll (ending May 9) to see if we have
> support to make the document a Standards Track document. If you support
> placing it on the Standards Track also consider if it is an update to
> RFC 6790.
>
> Please send your comments to the MPLS wg mailing list ( mpls@ietf.org ).
>
> /Loa
> for the mpls wf co-chairs
>
> PS
>
> I'm copying the spring working group on this mail.
> --
>
>
> Loa Andersson                        email: loa@pi.nu
> Senior MPLS Expert
> Bronze Dragon Consulting             phone: +46 739 81 21 64
>
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls
>
>
>

--000000000000daf417056b3db128
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Eric,<div><br></div><div>That=E2=80=99s a fair point, and =
a matter of interpretation of the draft. It would be more obvious that stan=
dards track was necessary if the draft defined new message formats or TLVs =
on the wire, or if any requests were being made of IANA. Neither is the cas=
e in this draft.<br><div><br></div><div>However, there is quite a bit of RF=
C 2119 language. That means that interoperability requirements are being ma=
de of implementers of a draft/RFC. An implementation MUST do the =E2=80=9CM=
UST=E2=80=9Ds, and so on, if they want to play nicely with other implementa=
tions.</div></div><div><br></div><div>Informational status is great for doc=
uments like architectures, problem statements, or to document how a particu=
lar vendor or operator did something interesting. However, right in the abs=
tract, this draft says =E2=80=9CThis document examines and describes how EL=
s are to be applied to Segment Routing MPLS.=E2=80=9D That, in combination =
with the RFC 2119 language, sounds very standards tracky, rather than infor=
mational, to me.</div><div><br></div><div>Cheers,</div><div>Andy</div><div>=
<br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">O=
n Wed, May 2, 2018 at 2:23 PM, Eric Gray <span dir=3D"ltr">&lt;<a href=3D"m=
ailto:eric.gray@ericsson.com" target=3D"_blank">eric.gray@ericsson.com</a>&=
gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 =
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-US" link=3D"blue" vlink=3D"purple">
<div class=3D"m_1760510505894215229WordSection1">
<p class=3D"MsoNormal">Andy,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Don=E2=80=99t you feel that this is=
 just a bit of a flip observation?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Personally I agree that RFC 2119 =
=E2=80=9Clanguage=E2=80=9D and even a reference to RFC 2119 itself seems in=
appropriate in an =E2=80=9CFYI=E2=80=9D RFC.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 But I have been over-ridden on that=
 before.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 I have to say, however that making =
something a standards track document _<i>because</i>_ it has RFC 2119 =E2=
=80=9Clanguage=E2=80=9D in it is a tad extreme.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Know another RFC that has a lot of =
RFC 2119 =E2=80=9Clanguage=E2=80=9D in it that is not a standards track RFC=
?=C2=A0 RFC 2119=E2=80=A6<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <span style=3D"font-family:&quot;Se=
goe UI Emoji&quot;,sans-serif">
=F0=9F=98=8A</span><u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">--<u></u><u></u></p>
<p class=3D"MsoNormal">Eric<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><b>From:</b> mpls [mailto:<a href=3D"mailto:mpls-bou=
nces@ietf.org" target=3D"_blank">mpls-bounces@ietf.org</a>] <b>On Behalf Of
</b>Andrew G. Malis<br>
<b>Sent:</b> Wednesday, May 02, 2018 9:01 AM<br>
<b>To:</b> Loa Andersson &lt;<a href=3D"mailto:loa@pi.nu" target=3D"_blank"=
>loa@pi.nu</a>&gt;<span class=3D""><br>
<b>Cc:</b> <a href=3D"mailto:mpls@ietf.org" target=3D"_blank">mpls@ietf.org=
</a>; <a href=3D"mailto:spring@ietf.org" target=3D"_blank">spring@ietf.org<=
/a>; <a href=3D"mailto:mpls-ads@ietf.org" target=3D"_blank">mpls-ads@ietf.o=
rg</a>; <a href=3D"mailto:draft-ietf-mpls-spring-entropy-label@ietf.org" ta=
rget=3D"_blank">draft-ietf-mpls-spring-<wbr>entropy-label@ietf.org</a><br>
</span><b>Subject:</b> Re: [mpls] should draft-ietf-mpls-spring-<wbr>entrop=
y-label be published as a RFC on the standards track?<u></u><u></u></p><div=
><div class=3D"h5">
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">Loa,<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">There=E2=80=99s plenty of RFC 2119 language in the d=
raft, so I support making this standards track.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Andy<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">On Wed, May 2, 2018 at 3:44 AM, Loa Andersson &lt;<a=
 href=3D"mailto:loa@pi.nu" target=3D"_blank">loa@pi.nu</a>&gt; wrote:<u></u=
><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0i=
n 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<p class=3D"MsoNormal">Working Group,<br>
<br>
February 1st the MPLS working Group requested that draft-ietf-mpls-<br>
spring-entropy-label should be published as an Informational RFC.<br>
<br>
During the RTG Directorate and AD reviews the question whether the<br>
document should instead be published as a RFC on the Standards Track<br>
has been raised.<br>
<br>
The decision to make the document Informational was taken &quot;a long time=
<br>
ago&quot;, based on discussions between the authors and involving the<br>
document shepherd, on the wg mailing list. At that point it we were<br>
convinced that the document should be progressed as an Informational<br>
document.<br>
<br>
It turns out that there has been such changes to the document that we<br>
now would like to request input from the working group if we should make<br=
>
the document a Standards Track RFC.<br>
<br>
Daniele&#39;s RTG Directorate review can be found at at:<br>
<a href=3D"https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy=
-label-08-rtgdir-lc-ceccarelli-2018-02-21/" target=3D"_blank">https://datat=
racker.ietf.org/<wbr>doc/review-ietf-mpls-spring-<wbr>entropy-label-08-rtgd=
ir-lc-<wbr>ceccarelli-2018-02-21/</a><br>
<br>
All the issues, with the exception whether it should be Informational<br>
or Standards track, has been resolved as part AD review.<br>
<br>
If the document is progressed as a Standard Tracks document then we<br>
also need to answer the question whether this is an update RFC 6790.<br>
<br>
This mail starts a one week poll (ending May 9) to see if we have<br>
support to make the document a Standards Track document. If you support<br>
placing it on the Standards Track also consider if it is an update to<br>
RFC 6790.<br>
<br>
Please send your comments to the MPLS wg mailing list ( <a href=3D"mailto:m=
pls@ietf.org" target=3D"_blank">
mpls@ietf.org</a> ).<br>
<br>
/Loa<br>
for the mpls wf co-chairs<br>
<br>
PS<br>
<br>
I&#39;m copying the spring working group on this mail.<span style=3D"color:=
#888888"><br>
<span class=3D"m_1760510505894215229hoenzb">-- </span><br>
<br>
<br>
<span class=3D"m_1760510505894215229hoenzb">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@pi.nu" target=3D"_blank">
loa@pi.nu</a></span><br>
<span class=3D"m_1760510505894215229hoenzb">Senior MPLS Expert</span><br>
<span class=3D"m_1760510505894215229hoenzb">Bronze Dragon Consulting=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0phone: +46 739 81 21 64</span><br>
<br>
<span class=3D"m_1760510505894215229hoenzb">______________________________<=
wbr>_________________</span><br>
<span class=3D"m_1760510505894215229hoenzb">mpls mailing list</span><br>
<span class=3D"m_1760510505894215229hoenzb"><a href=3D"mailto:mpls@ietf.org=
" target=3D"_blank">mpls@ietf.org</a></span><br>
<span class=3D"m_1760510505894215229hoenzb"><a href=3D"https://www.ietf.org=
/mailman/listinfo/mpls" target=3D"_blank">https://www.ietf.org/mailman/<wbr=
>listinfo/mpls</a></span></span><u></u><u></u></p>
</blockquote>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div></div></div>
</div>

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

--000000000000daf417056b3db128--


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Subject: [mpls] =?utf-8?q?RFC_8372_on_MPLS_Flow_Identification_Considerati?= =?utf-8?q?ons?=
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A new Request for Comments is now available in online RFC libraries.

        
        RFC 8372

        Title:      MPLS Flow Identification Considerations 
        Author:     S. Bryant,
                    C. Pignataro,
                    M. Chen,
                    Z. Li,
                    G. Mirsky
        Status:     Informational
        Stream:     IETF
        Date:       May 2018
        Mailbox:    stewart.bryant@gmail.com, 
                    cpignata@cisco.com, 
                    mach.chen@huawei.com,
                    lizhenbin@huawei.com, 
                    gregimirsky@gmail.com
        Pages:      11
        Characters: 26645
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-mpls-flow-ident-07.txt

        URL:        https://www.rfc-editor.org/info/rfc8372

        DOI:        10.17487/RFC8372

This document discusses aspects to consider when developing a
solution for MPLS flow identification.  The key application that
needs this solution is in-band performance monitoring of MPLS flows
when MPLS is used to encapsulate user data packets.

This document is a product of the Multiprotocol Label Switching Working Group of the IETF.


INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.

This announcement is sent to the IETF-Announce and rfc-dist lists.
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The RFC Editor Team
Association Management Solutions, LLC


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From: Nobo Akiya <nobo.akiya.dev@gmail.com>
Date: Fri, 4 May 2018 09:19:33 +0900
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To: Loa Andersson <loa@pi.nu>
Cc: "mpls@ietf.org" <mpls@ietf.org>,  "draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org" <draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org>,  "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>
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Subject: Re: [mpls] IPR poll on draft-ietf-mpls-lsp-ping-lag-multipath
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--000000000000464084056b56465c
Content-Type: text/plain; charset="UTF-8"

Hi Loa,

I am not aware of any IPR related to this document.

Regards,
Nobo

On Tue, Apr 24, 2018 at 6:42 PM, Loa Andersson <loa@pi.nu> wrote:

> Working Group,
>
> We are currently preparing draft draft-ietf-mpls-lsp-ping-lag-multipath
> for working group last call.
>
> Part of this preparation is to do an IPR poll.
>
> This mail is to start the IPR poll.
>
> Are you aware of any IPR that applies to draft-ietf-mpls-lsp-ping-
> lag-multipath?
>
> If so, has this IPR been disclosed in compliance with IETF IPR rules
> (see RFCs 3979, 4879, 3669 and 5378 for more details).
>
> There are no IPR disclosures against draft-ietf-mpls-lsp-ping-
> lag-multipath.
>
> 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.
>
>
> /Loa
>  mpls wg co-chair
> --
>
>
> Loa Andersson                        email: loa@pi.nu
> Senior MPLS Expert
> Bronze Dragon Consulting             phone: +46 739 81 21 64
>

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<div dir=3D"ltr"><span style=3D"color:rgb(34,34,34);font-family:arial,sans-=
serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font=
-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start=
;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;ba=
ckground-color:rgb(255,255,255);text-decoration-style:initial;text-decorati=
on-color:initial;float:none;display:inline">Hi Loa,</span><br style=3D"colo=
r:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:no=
rmal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400=
;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none=
;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial"><br style=3D"color=
:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:nor=
mal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;=
letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;=
white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-=
decoration-style:initial;text-decoration-color:initial"><span style=3D"colo=
r:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:no=
rmal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400=
;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none=
;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text=
-decoration-style:initial;text-decoration-color:initial;float:none;display:=
inline">I am not aware of any IPR related to this document.</span><br><div>=
<span style=3D"color:rgb(34,34,34);font-family:arial,sans-serif;font-size:1=
2.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:nor=
mal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;=
text-transform:none;white-space:normal;word-spacing:0px;background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial;=
float:none;display:inline"><br></span></div><div><span style=3D"color:rgb(3=
4,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;fo=
nt-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter=
-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-=
space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decora=
tion-style:initial;text-decoration-color:initial;float:none;display:inline"=
>Regards,</span></div><div><span style=3D"color:rgb(34,34,34);font-family:a=
rial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:n=
ormal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-a=
lign:start;text-indent:0px;text-transform:none;white-space:normal;word-spac=
ing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;tex=
t-decoration-color:initial;float:none;display:inline">Nobo</span></div></di=
v><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, Apr 24,=
 2018 at 6:42 PM, 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 cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex"><div class=3D"HOEnZb"><div class=3D"h5">Working Group,<br>
<br>
We are currently preparing draft draft-ietf-mpls-lsp-ping-lag-m<wbr>ultipat=
h for working group last call.<br>
<br>
Part of this preparation is to do an IPR poll.<br>
<br>
This mail is to start the IPR poll.<br>
<br>
Are you aware of any IPR that applies to draft-ietf-mpls-lsp-ping-<br>
lag-multipath?<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>
There are no IPR disclosures against draft-ietf-mpls-lsp-ping-<br>
lag-multipath.<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>
<br>
/Loa<br>
=C2=A0mpls wg co-chair<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@pi.nu" target=3D"_blank"=
>loa@pi.nu</a><br>
Senior MPLS Expert<br>
Bronze Dragon Consulting=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0pho=
ne: +46 739 81 21 64<br>
</div></div></blockquote></div><br></div>

--000000000000464084056b56465c--


From nobody Sun May  6 20:05:39 2018
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Subject: [mpls] I-D Action: draft-ietf-mpls-mldp-mib-04.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 Multiprotocol Label Switching WG of the IETF.

        Title           : Definitions of Managed Objects for the LDP Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths
        Authors         : Kishore Tiruveedhula
                          Uwe Joorde
                          Arvind Venkateswaran
	Filename        : draft-ietf-mpls-mldp-mib-04.txt
	Pages           : 40
	Date            : 2018-05-06

Abstract:
   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols.  In particular it defines
   objects for managing multicast LDP point-to-multipoint (P2MP) and
   multipoint-to-multipoint (MP2MP) Label Switched Paths.  The MIB
   module defined in this document is extension of LDP MIB defined in
   RFC3815 which supports only for LDP point-to-point LSPs.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mpls-mldp-mib/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-mpls-mldp-mib-04
https://datatracker.ietf.org/doc/html/draft-ietf-mpls-mldp-mib-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-mldp-mib-04


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 Mon May  7 04:05:32 2018
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Date: Mon, 7 May 2018 08:05:04 -0300
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Subject: [mpls] =?utf-8?q?Segment_Routing_vs=2E_=E2=80=9CLabel_Stacking?= =?utf-8?q?=E2=80=9D_in_draft-ietf-mpls-sfc-00?=
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--00000000000084101a056b9ba5c4
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The following URL is a diff between draft-farrel-mpls-sfc-04
and draft-farrel-mpls-sfc-05, when section 6 was updated to change Segment
Routing to =E2=80=9CLabel Stacking=E2=80=9D. (Note that the only changes fr=
om
draft-farrel-mpls-sfc-05 to draft-ietf-mpls-sfc-00 were the name and date
change).

https://tools.ietf.org/rfcdiff?url2=3Ddraft-farrel-mpls-sfc-05.txt

If you examine the changes to section 6, it=E2=80=99s pretty clear (at leas=
t to me)
that the changes are really just cosmetic in nature, such as removing a
reference to draft-ietf-spring-segment-routing and changing a few terms
here and there.

That, combined with the fact that the MPLS WG had never discussed =E2=80=9C=
Label
Stacking=E2=80=9D in a draft (never mind an RFC) prior to the introduction =
of
Segment Routing leaves me to conclude that section 6 really does need to be
removed in order to comply with the WG concerns about -04 and earlier
revisions of draft-farrel.

Thanks,
Andy

--00000000000084101a056b9ba5c4
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<div dir=3D"ltr">The following URL is a diff between=C2=A0draft-farrel-mpls=
-sfc-04 and=C2=A0draft-farrel-mpls-sfc-05, when section 6 was updated to ch=
ange Segment Routing to =E2=80=9CLabel Stacking=E2=80=9D. (Note that the on=
ly changes from draft-farrel-mpls-sfc-05 to=C2=A0draft-ietf-mpls-sfc-00 wer=
e the name and date change).<div><br></div><div><a href=3D"https://tools.ie=
tf.org/rfcdiff?url2=3Ddraft-farrel-mpls-sfc-05.txt">https://tools.ietf.org/=
rfcdiff?url2=3Ddraft-farrel-mpls-sfc-05.txt</a><br></div><div><br></div><di=
v>If you examine the changes to section 6, it=E2=80=99s pretty clear (at le=
ast to me) that the changes are really just cosmetic in nature, such as rem=
oving a reference to draft-ietf-spring-segment-routing and changing a few t=
erms here and there.=C2=A0</div><div><br></div><div>That, combined with the=
 fact that the MPLS WG had never discussed =E2=80=9CLabel Stacking=E2=80=9D=
 in a draft (never mind an RFC) prior to the introduction of Segment Routin=
g leaves me to conclude that section 6 really does need to be removed in or=
der to comply with the WG concerns about -04 and earlier revisions of draft=
-farrel.</div><div><br></div><div>Thanks,</div><div>Andy</div><div><br></di=
v></div>

--00000000000084101a056b9ba5c4--


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From: "Andrew G. Malis" <agmalis@gmail.com>
Date: Mon, 7 May 2018 08:15:47 -0300
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Subject: Re: [mpls]  =?utf-8?q?Segment_Routing_vs=2E_=E2=80=9CLabel_Stacking?= =?utf-8?q?=E2=80=9D_in_draft-ietf-mpls-sfc-00?=
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--000000000000e05e6a056b9bcb43
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I just realized that I was a bit more terse in my email than I should have
been. When I said that the MPLS WG had never discussed =E2=80=9CLabel Stack=
ing=E2=80=9D,
well of course we have the label stack, but we had never discussed, prior
to Segment Routing, using the label stack as a method to do source routing
via only popping labels, with no label swapping along the path.

Cheers,
Andy


On Mon, May 7, 2018 at 8:05 AM, Andrew G. Malis <agmalis@gmail.com> wrote:

> The following URL is a diff between draft-farrel-mpls-sfc-04
> and draft-farrel-mpls-sfc-05, when section 6 was updated to change Segmen=
t
> Routing to =E2=80=9CLabel Stacking=E2=80=9D. (Note that the only changes =
from
> draft-farrel-mpls-sfc-05 to draft-ietf-mpls-sfc-00 were the name and date
> change).
>
> https://tools.ietf.org/rfcdiff?url2=3Ddraft-farrel-mpls-sfc-05.txt
>
> If you examine the changes to section 6, it=E2=80=99s pretty clear (at le=
ast to
> me) that the changes are really just cosmetic in nature, such as removing=
 a
> reference to draft-ietf-spring-segment-routing and changing a few terms
> here and there.
>
> That, combined with the fact that the MPLS WG had never discussed =E2=80=
=9CLabel
> Stacking=E2=80=9D in a draft (never mind an RFC) prior to the introductio=
n of
> Segment Routing leaves me to conclude that section 6 really does need to =
be
> removed in order to comply with the WG concerns about -04 and earlier
> revisions of draft-farrel.
>
> Thanks,
> Andy
>
>

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<div dir=3D"ltr">I just realized that I was a bit more terse in my email th=
an I should have been. When I said that the MPLS WG had never discussed =E2=
=80=9CLabel Stacking=E2=80=9D, well of course we have the label stack, but =
we had never discussed, prior to Segment Routing, using the label stack as =
a method to do source routing via only popping labels, with no label swappi=
ng along the path.<div><br></div><div>Cheers,</div><div>Andy</div><div><br>=
</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mo=
n, May 7, 2018 at 8:05 AM, Andrew G. Malis <span dir=3D"ltr">&lt;<a href=3D=
"mailto:agmalis@gmail.com" target=3D"_blank">agmalis@gmail.com</a>&gt;</spa=
n> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr">The following =
URL is a diff between=C2=A0draft-farrel-mpls-sfc-<wbr>04 and=C2=A0draft-far=
rel-mpls-sfc-05, when section 6 was updated to change Segment Routing to =
=E2=80=9CLabel Stacking=E2=80=9D. (Note that the only changes from draft-fa=
rrel-mpls-sfc-05 to=C2=A0draft-ietf-mpls-sfc-00 were the name and date chan=
ge).<div><br></div><div><a href=3D"https://tools.ietf.org/rfcdiff?url2=3Ddr=
aft-farrel-mpls-sfc-05.txt" target=3D"_blank">https://tools.ietf.org/<wbr>r=
fcdiff?url2=3Ddraft-farrel-<wbr>mpls-sfc-05.txt</a><br></div><div><br></div=
><div>If you examine the changes to section 6, it=E2=80=99s pretty clear (a=
t least to me) that the changes are really just cosmetic in nature, such as=
 removing a reference to draft-ietf-spring-segment-<wbr>routing and changin=
g a few terms here and there.=C2=A0</div><div><br></div><div>That, combined=
 with the fact that the MPLS WG had never discussed =E2=80=9CLabel Stacking=
=E2=80=9D in a draft (never mind an RFC) prior to the introduction of Segme=
nt Routing leaves me to conclude that section 6 really does need to be remo=
ved in order to comply with the WG concerns about -04 and earlier revisions=
 of draft-farrel.</div><div><br></div><div>Thanks,</div><div>Andy</div><div=
><br></div></div>
</blockquote></div><br></div>

--000000000000e05e6a056b9bcb43--


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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: <mpls@ietf.org>
Date: Tue, 8 May 2018 14:07:35 +0100
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Subject: [mpls] Proposed text changes to draft-ietf-mpls-sfc
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Hi WG,

There were two areas of discussion about this document. The first concerned
whether it would really be possible to use the "MPLS-encoded logical NSH" as a
transition technology utilising existing MPLS devices. The second was to give
some use-case explanation for a label stack approach that is distinctly not
Segment Routing.

On April 4th I offered to draft some text on these topics and since no one
demurred I have (finally) done so and discussed it with my co-authors.

Here are the proposed changes.

Cheers,
Adrian

===

Section 1, near the end
ADD
   Section 4 provides a short overview of several use case scenarios
   that help to explain the relationship between the MPLS label
   operations (swapping, popping, stacking) and the MPLS encoding of
   the logical NSH described in this document).
END

---

New Section 4
ADD
4.  Use Case Scenarios

   There are five scenarios that can be considered for the use of an
   MPLS encoding in support of SFC.  These are set out in the following
   sub-sections.

4.1.  Label Swapping for Logical NSH

   The primary use case for SFC is described in [RFC7665] and delivered
   using the NSH which, as described in [RFC8300], uses an encapsulation
   that is modified at each SFC hop along the chain to indicate the next
   hop.

   The label swapping use case scenario effectively replaces the NSH
   with an MPLS encapsulation as described in Section 6.  The MPLS
   labels encode the same information as the NSH to form a logical NSH.
   The labels are modified (swapped per [RFC3031]) at each SFC hop along
   the chain to indicate the next hop.  The processing and forwarding
   state for a chain (i.e., the actions to take on a received label) are
   programmed in to the network using a control plane or management
   plane.

4.2.  Hierarchical Encapsulation

   [I-D.ietf-sfc-hierarchical] describes an architecture for
   hierarchical encapsulation using the NSH.  It facilitates
   partitioning of SFC domains for administrative reasons, and allows
   concatenation of service function chains under the control of a
   service classifier.

   The same function can be achieved in an MPLS network using an MPLS
   encoding of the logical NSH, and label stacking as defined in
   [RFC3031] and described in Section 7.  In this model, swapping is
   used per Section 4.1 to navigate one chain, and when the end of the
   chain is reached, the final label is popped revealing the label for
   another chain.  Thus, the primary mode is swapping, but stacking is
   used to enable the ingress classifier to control concatenation of
   service function chains.

4.3.  Fine Control of Service Function Instances

   It may be that a service function chain (as described in Section 4.1
   allows some leeway in the choice of service function instances along
   the chain.  However, it may be that a service classifier wishes to
   constrain the choice and this can be achieved using chain
   concatenation so that the first chain ends at the point of choice,
   the next label in the stack indicates the specific service function
   instance to be executed, and the next label in the stack starts a new
   chain.  Thus, a mixture of label swapping and stacking is used.

4.4.  Micro Chains and Label Stacking

   The scenario in Section 4.2 may be extended to its logical extreme by
   making each concatenated chain as short as it can be: one service
   function.  Each label in the stack indicates the next service
   function to be executed, and the network is programmed through the
   control plane or management plane to know how to route to the next
   (i.e., first) hop in each chain just as it would be to support the
   scenarios in Section 4.1 and Section 4.2.

4.5.  SFC and Segment Routing

   Segment Routing (SR) in an MPLS network (known as MPLS-SR) uses a
   stack of MPLS labels to encode information about the path and network
   functions that a packet should traverse.  MPLS-SR is achieved by
   applying control plane and management plane techniques to program the
   MPLS forwarding plane, and by imposing labels on packets at the
   entrance to the MPLS-SR network.

   The application of SR to SFC was considered in early versions of the
   SR architecture [I-D.ietf-spring-segment-routing] and the MPLS-SR
   specification [I-D.ietf-spring-segment-routing-mpls], but has since
   been moved out of those documents.  An implementation proposal for
   achieving SFC using MPLS-SR can be found in
   [I-D.xuclad-spring-sr-service-chaining] and is not discussed further
   in this document.
END

---

Section 13 (was 12) new first paragraph
ADD
   This section reverts to the simplified descriptions of networks that
   rely wholly on label swapping or label stacking.  As described in
   Section 4, actual deployment scenarios may depend on the use of both
   mechanisms and utilize a mixed mode as described in Section 8.
END

---

New Section 14
ADD
14.  Implementation Notes

   It is not the job of an IETF specification to describe the internals
   of an implementation except where that directly impacts upon the bits
   on the wire that change the likelihood of interoperability, or where
   the availability of configuration or security options directly affect
   the utility of an implementation.

   However, in view of the objective of this document to acknowledge
   that there may be a need for an interim deployment of SFC
   functionality in brownfield MPLS networks, this section provides some
   observations about how an SFF might utilize MPLS features that are
   available in existing routers.  This section is not intended to be
   definitive or technically complete, but is indicative.

   Consider the mechanism used to indicate to which Virtual Routing and
   Forwarding (VRF) an incoming MPLS packet should be routed in a Layer
   3 Virtual Private Network (L3VPN) [RFC4364].  In this case, the top
   MPLS label is an indicator of the VRF that is to be used to route the
   payload.

   A similar approach can be taken with the label swapping SFC technique
   described in Section 6 such that the SFC Context Label identifies a
   routing table specific to the SFP.  The SF Label can be looked up in
   the context of this routing table to determine to which SF to direct
   the packet, and how to forward it to the next SFF.

   Advanced features (such as metadata) are not inspected by SFFs.  The
   packets are passed to SFIs that are MPLS-SFC-aware or to SFC proxies,
   and those components are responsible for handling all metadata
   issues.

   Of course, an actual implementation might make considerable
   optimizations on this approach, but this section should provide hints
   about how MPLS-based SFC might be achieved with relatively small
   modifications to deployed MPLS devices.
END


From nobody Tue May  8 06:14:11 2018
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From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [mpls] Proposed text changes to draft-ietf-mpls-sfc - proposed 4.1
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The opening sentence you have proposed for section 4.1 is technically 
accurate, but seems misleading.  One of the benefits of NSH is that it 
has a path identifier that SFF do not change, while using an explicit 
position indicator.  I suggest a small text change below.

Thank you,
Joel

On 5/8/18 9:07 AM, Adrian Farrel wrote:
...
> 
> 4.1.  Label Swapping for Logical NSH
> 
>     The primary use case for SFC is described in [RFC7665] and delivered
>     using the NSH which, as described in [RFC8300], uses an encapsulation
>     that is modified at each SFC hop along the chain to indicate the next
>     hop.

s/that is modified at each SFC hop/with a position indicator that is 
modified at each SFC hod/

...


From nobody Tue May  8 07:40:37 2018
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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Joel M. Halpern'" <jmh@joelhalpern.com>
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Date: Tue, 8 May 2018 15:40:14 +0100
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Subject: Re: [mpls] Proposed text changes to draft-ietf-mpls-sfc - proposed 4.1
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Thanks Joel,

Yes, that is a good refinement.

A
> -----Original Message-----
> From: Joel M. Halpern [mailto:jmh@joelhalpern.com]
> Sent: 08 May 2018 14:14
> To: adrian@olddog.co.uk; mpls@ietf.org
> Subject: Re: [mpls] Proposed text changes to draft-ietf-mpls-sfc - proposed 4.1
> 
> The opening sentence you have proposed for section 4.1 is technically
> accurate, but seems misleading.  One of the benefits of NSH is that it
> has a path identifier that SFF do not change, while using an explicit
> position indicator.  I suggest a small text change below.
> 
> Thank you,
> Joel
> 
> On 5/8/18 9:07 AM, Adrian Farrel wrote:
> ...
> >
> > 4.1.  Label Swapping for Logical NSH
> >
> >     The primary use case for SFC is described in [RFC7665] and delivered
> >     using the NSH which, as described in [RFC8300], uses an encapsulation
> >     that is modified at each SFC hop along the chain to indicate the next
> >     hop.
> 
> s/that is modified at each SFC hop/with a position indicator that is
> modified at each SFC hod/
> 
> ...


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From: Vishnu Pavan Beeram <vishnupavan@gmail.com>
Date: Fri, 11 May 2018 17:02:47 -0400
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Subject: [mpls] Fwd: WG adoption poll - draft-deshmukh-teas-rsvp-rmr-extension
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FYI - the following adoption poll is taking place in the TEAS WG.

---------- Forwarded message ----------
From: Vishnu Pavan Beeram <vishnupavan@gmail.com>
Date: Fri, May 11, 2018 at 5:01 PM
Subject: WG adoption poll - draft-deshmukh-teas-rsvp-rmr-extension
To: TEAS WG <teas@ietf.org>
Cc: TEAS WG Chairs <teas-chairs@ietf.org>


All,

This is start of a two week poll on making
draft-deshmukh-teas-rsvp-rmr-extension-00 a TEAS working group document.
Please send email to the list indicating "yes/support" or "no/do not
support". If indicating no, please state your reservations with the
document. If yes, please also feel free to provide comments you'd
like to see addressed once the document is a WG document.

The poll ends May 25th.

Thanks,
Pavan and Lou
ps: Note that this draft is an import from the MPLS WG

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<div dir=3D"ltr">FYI - the following <span class=3D"gmail-il">adoption</spa=
n> <span class=3D"gmail-il">poll</span> is taking place in the TEAS WG.<br>=
<br><div class=3D"gmail_quote">---------- Forwarded message ----------<br>F=
rom: <b class=3D"gmail_sendername">Vishnu Pavan Beeram</b> <span dir=3D"ltr=
">&lt;<a href=3D"mailto:vishnupavan@gmail.com">vishnupavan@gmail.com</a>&gt=
;</span><br>Date: Fri, May 11, 2018 at 5:01 PM<br>Subject: WG adoption poll=
 - draft-deshmukh-teas-rsvp-rmr-extension<br>To: TEAS WG &lt;<a href=3D"mai=
lto:teas@ietf.org">teas@ietf.org</a>&gt;<br>Cc: TEAS WG Chairs &lt;<a href=
=3D"mailto:teas-chairs@ietf.org">teas-chairs@ietf.org</a>&gt;<br><br><br><d=
iv dir=3D"ltr"><div>All,<br>
<br>
This is start of a two week <span class=3D"m_8739115075534797896gmail-m_176=
8382976739990145gmail-m_-8969735202532587428gmail-il">poll</span> on making=
<br>draft-deshmukh-teas-rsvp-rmr-<wbr>extension-00 a TEAS working group doc=
ument.<br>
Please send email to the list indicating &quot;yes/support&quot; or &quot;n=
o/do not<br>
support&quot;. If indicating no, please state your reservations with the<br=
>
document. If yes, please also feel free to provide comments you&#39;d<br>
like to see addressed once the document is a WG document.<br>
<br>
The <span class=3D"m_8739115075534797896gmail-m_1768382976739990145gmail-m_=
-8969735202532587428gmail-il">poll</span> ends May 25th.<br>
<br>
Thanks,<br>
Pavan and Lou<br></div><div>ps: Note that this draft is an import from the =
MPLS WG<br></div><br></div>
</div><br></div>

--000000000000552b96056bf47598--


From nobody Sun May 13 03:04:03 2018
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From: Loa Andersson <loa@pi.nu>
To: "mpls@ietf.org" <mpls@ietf.org>
Cc: "spring@ietf.org" <spring@ietf.org>, "draft-ietf-mpls-spring-entropy-label@ietf.org" <draft-ietf-mpls-spring-entropy-label@ietf.org>, "mpls-ads@ietf.org" <mpls-ads@ietf.org>
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Subject: [mpls] Closed: should draft-ietf-mpls-spring-entropy-label be published as a RFC on the standards track?
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Working Group,

This poll has been closed.

We have no objections to publishing draft-ietf-mpls-spring-entropy-label
as a RFC on the standards track. We also seem to have some support for
adding information that an entropy label is not necessarily the only
method handling ECMP.

I will forward this to Deborah (AD responsible for this document).

/Loa

On 2018-05-02 09:44, Loa Andersson wrote:
> Working Group,
> 
> February 1st the MPLS working Group requested that draft-ietf-mpls-
> spring-entropy-label should be published as an Informational RFC.
> 
> During the RTG Directorate and AD reviews the question whether the
> document should instead be published as a RFC on the Standards Track
> has been raised.
> 
> The decision to make the document Informational was taken "a long time
> ago", based on discussions between the authors and involving the
> document shepherd, on the wg mailing list. At that point it we were
> convinced that the document should be progressed as an Informational
> document.
> 
> It turns out that there has been such changes to the document that we
> now would like to request input from the working group if we should make
> the document a Standards Track RFC.
> 
> Daniele's RTG Directorate review can be found at at:
> https://datatracker.ietf.org/doc/review-ietf-mpls-spring-entropy-label-08-rtgdir-lc-ceccarelli-2018-02-21/ 
> 
> 
> All the issues, with the exception whether it should be Informational
> or Standards track, has been resolved as part AD review.
> 
> If the document is progressed as a Standard Tracks document then we
> also need to answer the question whether this is an update RFC 6790.
> 
> This mail starts a one week poll (ending May 9) to see if we have
> support to make the document a Standards Track document. If you support
> placing it on the Standards Track also consider if it is an update to
> RFC 6790.
> 
> Please send your comments to the MPLS wg mailing list ( mpls@ietf.org ).
> 
> /Loa
> for the mpls wf co-chairs
> 
> PS
> 
> I'm copying the spring working group on this mail.

-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Bronze Dragon Consulting             phone: +46 739 81 21 64


From nobody Tue May 15 01:38:36 2018
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To: "Andrew G. Malis" <agmalis@gmail.com>, mpls@ietf.org, sfc@ietf.org
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From: Loa Andersson <loa@pi.nu>
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Subject: Re: [mpls]  =?utf-8?q?Segment_Routing_vs=2E_=E2=80=9CLabel_Stacking?= =?utf-8?q?=E2=80=9D_in_draft-ietf-mpls-sfc-00?=
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 >chair-hat off>

Andy,

Inlime please.

On 2018-05-07 13:15, Andrew G. Malis wrote:
> I just realized that I was a bit more terse in my email than I should 
> have been. When I said that the MPLS WG had never discussed “Label 
> Stacking”, well of course we have the label stack, but we had never 
> discussed, prior to Segment Routing, using the label stack as a method 
> to do source routing via only popping labels, with no label swapping 
> along the path.

I think that this would be an argument if

    POP'n'go == SR

but an entirely different case if

    POP'n'go > SR

I think we can see from the uses case proposed by the authors of
draft-ietf-mpls-sfc there are a lot of additional things for POP'n'go,
and that it motivates its place in an MPLS wg draft.

Please send comments on Adrian mail with proposed changes.

/Loa


> 
> Cheers,
> Andy
> 
> 
> On Mon, May 7, 2018 at 8:05 AM, Andrew G. Malis <agmalis@gmail.com 
> <mailto:agmalis@gmail.com>> wrote:
> 
>     The following URL is a diff between draft-farrel-mpls-sfc-04
>     and draft-farrel-mpls-sfc-05, when section 6 was updated to change
>     Segment Routing to “Label Stacking”. (Note that the only changes
>     from draft-farrel-mpls-sfc-05 to draft-ietf-mpls-sfc-00 were the
>     name and date change).
> 
>     https://tools.ietf.org/rfcdiff?url2=draft-farrel-mpls-sfc-05.txt
>     <https://tools.ietf.org/rfcdiff?url2=draft-farrel-mpls-sfc-05.txt>
> 
>     If you examine the changes to section 6, it’s pretty clear (at least
>     to me) that the changes are really just cosmetic in nature, such as
>     removing a reference to draft-ietf-spring-segment-routing and
>     changing a few terms here and there.
> 
>     That, combined with the fact that the MPLS WG had never discussed
>     “Label Stacking” in a draft (never mind an RFC) prior to the
>     introduction of Segment Routing leaves me to conclude that section 6
>     really does need to be removed in order to comply with the WG
>     concerns about -04 and earlier revisions of draft-farrel.
> 
>     Thanks,
>     Andy
> 
> 
> 
> 
> _______________________________________________
> mpls mailing list
> mpls@ietf.org
> https://www.ietf.org/mailman/listinfo/mpls
> 

-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Bronze Dragon Consulting             phone: +46 739 81 21 64


From nobody Tue May 15 02:42:19 2018
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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 Multiprotocol Label Switching WG of the IETF.

        Title           : An MPLS-Based Forwarding Plane for Service Function Chaining
        Authors         : Adrian Farrel
                          Stewart Bryant
                          John Drake
	Filename        : draft-ietf-mpls-sfc-01.txt
	Pages           : 28
	Date            : 2018-05-15

Abstract:
   Service Function Chaining (SFC) is the process of directing packets
   through a network so that they can be acted on by an ordered set of
   abstract service functions before being delivered to the intended
   destination.  An architecture for SFC is defined in RFC7665.

   The Network Service Header (NSH) can be inserted into packets to
   steer them along a specific path to realize a Service Function Chain.

   Multiprotocol Label Switching (MPLS) is a widely deployed forwarding
   technology that uses labels placed in a packet in a label stack to
   identify the forwarding actions to be taken at each hop through a
   network.  Actions may include swapping or popping the labels as well,
   as using the labels to determine the next hop for forwarding the
   packet.  Labels may also be used to establish the context under which
   the packet is forwarded.

   This document describes how Service Function Chaining can be achieved
   in an MPLS network by means of a logical representation of the NSH in
   an MPLS label stack.  It does not deprecate or replace the NSH, but
   acknowledges that there may be a need for an interim deployment of
   SFC functionality in brownfield networks.


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

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-mpls-sfc-01
https://datatracker.ietf.org/doc/html/draft-ietf-mpls-sfc-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-sfc-01


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 Tue May 15 02:56:00 2018
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Subject: Re: [mpls] I-D Action: draft-ietf-mpls-sfc-01.txt
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WG,

A week ago I proposed some changes to this document and, hearing no objections,
the authors have made -01 and I have posted it.

Of course, it's a WG document so discussion of the content can continue and
changes can be made.

We hope that the new version will provide some clarity about the use cases for
label-stacking/popping and show how those are not specific to Segment Routing.
Having a discussion about the technical content of the document would be most
welcome.

Thanks,
Adrian
> -----Original Message-----
> From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> Sent: 15 May 2018 10:42
> To: i-d-announce@ietf.org
> Cc: mpls@ietf.org
> Subject: I-D Action: draft-ietf-mpls-sfc-01.txt
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> This draft is a work item of the Multiprotocol Label Switching WG of the IETF.
> 
>         Title           : An MPLS-Based Forwarding Plane for Service Function
Chaining
>         Authors         : Adrian Farrel
>                           Stewart Bryant
>                           John Drake
> 	Filename        : draft-ietf-mpls-sfc-01.txt
> 	Pages           : 28
> 	Date            : 2018-05-15
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-mpls-sfc/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-mpls-sfc-01
> https://datatracker.ietf.org/doc/html/draft-ietf-mpls-sfc-01
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-sfc-01


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From nobody Mon May 21 06:21:50 2018
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From: Loa Andersson <loa@pi.nu>
To: "mpls@ietf.org" <mpls@ietf.org>
Cc: "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "draft-esale-mpls-ldp-rmr-extensions@ietf.org" <draft-esale-mpls-ldp-rmr-extensions@ietf.org>
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Subject: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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Working Group,

We are currently preparing draft draft-esale-mpls-ldp-rmr-extensions
for working group adoption.

Part of this preparation is to do an IPR poll.

This mail is to start the IPR poll.

Are you aware of any IPR that applies to draft-esale-mpls-ldp-
rmr-extensions?

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

There are no IPR disclosures against draft-esale-mpls-ldp-
rmr-extensions.

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.


/Loa
  mpls wg co-chair
-- 


Loa Andersson                        email: loa@pi.nu
Senior MPLS Expert
Bronze Dragon Consulting             phone: +46 739 81 21 64


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From nobody Tue May 22 11:42:23 2018
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From: IETF Secretariat <ietf-ipr@ietf.org>
To: <draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org>
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Subject: [mpls] IPR Disclosure Cisco's Statement about IPR related to draft-ietf-mpls-lsp-ping-lag-multipath
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Dear Nobo Akiya, George Swallow, Stephane Litkowski, Bruno Decraene, John Drake, Mach Chen:


An IPR disclosure that pertains to your Internet-Draft entitled "Label
Switched Path (LSP) Ping/Trace Multipath Support for Link Aggregation Group
(LAG) Interfaces" (draft-ietf-mpls-lsp-ping-lag-multipath) was submitted
to the IETF Secretariat on  and has been posted on the "IETF Page of
Intellectual Property Rights Disclosures"
(https://datatracker.ietf.org/ipr/3192/). The title of the IPR disclosure is
"Cisco's Statement about IPR related to
draft-ietf-mpls-lsp-ping-lag-multipath"


Thank you

IETF Secretariat


From nobody Wed May 23 03:04:14 2018
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From: Mach Chen <mach.chen@huawei.com>
To: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>, "draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org" <draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>
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Thread-Topic: Routing directorate review of draft-ietf-mpls-lsp-ping-lag-multipath-03
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From: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>
To: Mach Chen <mach.chen@huawei.com>, "draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org" <draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>
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Thread-Topic: Routing directorate review of draft-ietf-mpls-lsp-ping-lag-multipath-03
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/_6nI4rqIQGrEgL1UqhFl7CMwv7A>
Subject: Re: [mpls] Routing directorate review of draft-ietf-mpls-lsp-ping-lag-multipath-03
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Subject: [mpls] I-D Action: draft-ietf-mpls-spring-entropy-label-11.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 Multiprotocol Label Switching WG of the IETF.

        Title           : Entropy label for SPRING tunnels
        Authors         : Sriganesh Kini
                          Kireeti Kompella
                          Siva Sivabalan
                          Stephane Litkowski
                          Rob Shakir
                          Jeff Tantsura
	Filename        : draft-ietf-mpls-spring-entropy-label-11.txt
	Pages           : 23
	Date            : 2018-05-23

Abstract:
   Segment Routing (SR) leverages the source routing paradigm.  A node
   steers a packet through an ordered list of instructions, called
   segments.  Segment Routing can be applied to the Multi Protocol Label
   Switching (MPLS) data plane.  Entropy label (EL) is a technique used
   in MPLS to improve load-balancing.  This document examines and
   describes how ELs are to be applied to Segment Routing MPLS.


The IETF datatracker status page for this draft is:
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There are also htmlized versions available at:
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https://datatracker.ietf.org/doc/html/draft-ietf-mpls-spring-entropy-label-11

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A new version (-11) has been submitted for draft-ietf-mpls-spring-entropy-label:
https://www.ietf.org/internet-drafts/draft-ietf-mpls-spring-entropy-label-11.txt


The IETF datatracker page for this Internet-Draft is:
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--00000000000041e558056ce4e005
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Adrian et al,

I just had a chance to review draft-ietf-mpls-sfc-01 in detail, and have a
few comments.

First of all, thanks for including the section 4.5 text.

That said, I=E2=80=99m having a hard time distinguishing between using MPLS=
-SR for
SFC and the =E2=80=9Cmicro chains=E2=80=9D discussed in section 4.4. I agre=
e that the
=E2=80=9Cmicro chains" are a logical extreme of section 4.2, but that said,=
 section
4.2 does include swapping as well as popping, while section 4.4 is pure
popping. It would be greatly appreciated if you could add text that
differentiates =E2=80=9Cmicro chains=E2=80=9D from MPLS-SR, otherwise it=E2=
=80=99s just a different
name for the same functionality. If there is actually is no difference,
then section 4.4 should be removed.

I also have a comment in section 12. The text currently says "It should be
noted that the MPLS encoding is slightly less functional than the direct
use of the NSH.=E2=80=9D In this case, =E2=80=9Cslightly=E2=80=9D is a judg=
ement for the reader to
make, and I see a huge loss of functionality because there=E2=80=99s no sup=
port for
per-packet metadata. Please remove the word =E2=80=9Cslightly=E2=80=9D in t=
his text.
Without the word =E2=80=9Cslightly=E2=80=9D, the text changes from an opini=
on to a fact.

Thanks,
Andy

--00000000000041e558056ce4e005
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Adrian et al,<div><br></div><div>I just had a chance to re=
view draft-ietf-mpls-sfc-01 in detail, and have a few comments.</div><div><=
br></div><div>First of all, thanks for including the section 4.5 text.</div=
><div><br></div><div>That said, I=E2=80=99m having a hard time distinguishi=
ng between using MPLS-SR for SFC and the =E2=80=9Cmicro chains=E2=80=9D dis=
cussed in section 4.4. I agree that the =E2=80=9Cmicro chains&quot; are a l=
ogical extreme of section 4.2, but that said, section 4.2 does include swap=
ping as well as popping, while section 4.4 is pure popping. It would be gre=
atly appreciated if you could add text that differentiates =E2=80=9Cmicro c=
hains=E2=80=9D from MPLS-SR, otherwise it=E2=80=99s just a different name f=
or the same functionality. If there is actually is no difference, then sect=
ion 4.4 should be removed.</div><div><br></div><div>I also have a comment i=
n section 12. The text currently says &quot;It should be noted that the MPL=
S encoding is slightly less functional than the direct use of the NSH.=E2=
=80=9D In this case, =E2=80=9Cslightly=E2=80=9D is a judgement for the read=
er to make, and I see a huge loss of functionality because there=E2=80=99s =
no support for per-packet metadata. Please remove the word =E2=80=9Cslightl=
y=E2=80=9D in this text. Without the word =E2=80=9Cslightly=E2=80=9D, the t=
ext changes from an opinion to a fact.</div><div><br></div><div>Thanks,</di=
v><div>Andy</div><div><br></div></div>

--00000000000041e558056ce4e005--


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Mach -

>>
>> Top of page 13:
>>    The initiator LSR sends two MPLS echo request messages to traverse
>>    the two LAG members at TTL=3D1:
>> =E2=80=9CTTL=3D1=E2=80=9D should be =E2=80=9CTTL=3Dn=E2=80=9D.
>
>Good catch, fixed.

At this point in the procedure you have already reached the node at ttl=3Dn=
.
You are now probing a LAG that extends to the node at TTL=3Dn+1.

S0 the text should be "TTL=3Dn+1".

Thanks,

George

On Wed, May 23, 2018 at 6:03 AM, Mach Chen <mach.chen@huawei.com> wrote:

> Hi Jon,
>
> Thanks for the detailed review and useful comments!
>
> Please see some responses inline...
>
> > From: Jonathan Hardwick [mailto:Jonathan.Hardwick@metaswitch.com]
> > Sent: Tuesday, May 22, 2018 3:39 AM
> > To: draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org; mpls@ietf.org;
> mpls-
> > chairs@ietf.org
> > Cc: rtg-dir@ietf.org
> > Subject: Routing directorate review of draft-ietf-mpls-lsp-ping-lag-
> multipath-03
> >
> > Hello
> >
> > I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=
=9D review of this
> draft.
> > https://datatracker.ietf.org/doc/draft-ietf-mpls-lsp-ping-lag-multipath=
/
> >
> > The routing directorate will, on request from the working group chair,
> perform
> > an =E2=80=9Cearly=E2=80=9D review of a draft before it is submitted for=
 publication to
> the
> > IESG.  The early review can be performed at any time during the draft=
=E2=80=99s
> > lifetime as a working group document.  The purpose of the early review
> > depends on the stage that the document has reached.  As this document i=
s
> close
> > to working group last call, my focus for the review was to determine
> whether
> > the document is ready to be published.  Please consider my comments alo=
ng
> > with the other working group last call comments.
> >
> > For more information about the Routing Directorate, please see
> > http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir
> >
> > Best regards
> > Jon
> >
> >
> > Document: draft-ietf-mpls-lsp-ping-lag-multipath-03.txt
> > Reviewer: Jonathan Hardwick
> > Review Date: 21 May 2018
> > Intended Status: Standards Track
> >
> > Summary
> > This document looks ready for working group last call.  I have a few
> minor
> > issues that I am sure can be resolved during the last call.
> >
> >
> > Section 2
> > First paragraph: the reference to section 3.3 of [RFC8029] looks wrong.
> Should
> > it be a reference to section 4?
>
> It was intended to refer to Section 3.3 RFC4079 (Downstream Mapping).
>
> How about the following text:
> "Reader is expected to be familiar with mechanics of Downstream Mapping
> described in Section 3.3 of RFC8029 and Downstream Detailed Mapping TLV
> (DDMAP) described in Section 3.4 of RFC8029."
>
>
> >
> > Section 3
> > =E2=80=9CWhen the responder LSR receives an MPLS echo reply message=E2=
=80=9D <- you mean
> > =E2=80=9CMPLS echo request message=E2=80=9D.
>
> Yes.
>
> >
> > Section 5.1
> > This is fine, but I found it a bit cumbersome to read.  How about this
> rewording?
> > NEW
> >   If the downstream LSR does not return Remote Interface Index sub-TLVs
> in
> >   the DDMAP, then the initiator LSR validates LAG member link traversal
> by
> >   traversing all available LAG member links and then using the procedur=
e
> > described
> >   below.  This section provides the mechanism for the initiator LSR to
> obtain
> > additional information from the downstream LSRs and describes the
> additional
> > logic in the initiator LSR to validate the L2 ECMP traversal.
> > END
>
> This looks good to me, thanks for the new text!
>
> >
> > Section 5.1.3
> > For my interest, why are you using =E2=80=9Centropy=E2=80=9D here?  It =
sounds like you
> mean
> > =E2=80=9Cprobability=E2=80=9D, but I might have misunderstood your mean=
ing.
>
> The "entropy" is used to select specific LAG member link, it has the
> similar concept as "entropy label".
>
> >
> > Top of page 13:
> >    The initiator LSR sends two MPLS echo request messages to traverse
> >    the two LAG members at TTL=3D1:
> > =E2=80=9CTTL=3D1=E2=80=9D should be =E2=80=9CTTL=3Dn=E2=80=9D.
>
> Good catch, fixed.
>
> >
> > Section 6
> > Typo =E2=80=9Cin the in the=E2=80=9D
>
> Fixed.
>
> >
> > Section 8 and 9
> > This draft only discusses using the new Local & Remote Interface Index
> Sub-
> > TLVs in the context of a DDMAP for a LAG interface, so I was surprised
> to read
> > that it is permissible to set M=3D0 in these TLVs.  You should describe
> how the
> > TLV is used in that case, if you are going to allow it.
> > Does the M flag need to be set consistently in all Local & Remote
> Interface
> > Index Sub-TLVs  in a given DDMAP TLV?
> > In fact, isn=E2=80=99t the M flag redundant, given that the enclosing D=
DMAP has
> the
> > "LAG Description Indicator flag"?
>
> Indeed, seems redundant, I will do double check on it.
>
> >
> > Section 10
> > Why do you need the Sub-TLV length field?  It can be inferred from the
> TLV
> > length and the address type.
>
> Indeed, and I personally agree, I will talk to the co-authors, if there i=
s
> no further reasons, will remove the sub-TLV length field.
>
> > Section 10.1.1 =E2=80=93 if the LSR received no labels (e.g. PHP case) =
then
> should it omit
> > this sub-TLV, or include an empty sub-TLV?
>
> The sub-TLV is derived from Label Stack Sub-TLV defined in 8029, it has
> the same usage as Label Stack Sub-TLV. So, for that case, the sub-TLV
> should be included and an Implicit Null label returned.
>
> >
> > Other nits
> > Throughout, English grammar needs to be fine-tuned e.g. there are
> definite
> > and indefinite articles missing.  However, I found the document perfect=
ly
> > readable, so perhaps this can be left for the RFC editor.
>
> Sure, thanks.
>
> Best regards,
> Mach
>

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

<div dir=3D"ltr"><div><div><div><div>Mach -<br><br></div><span class=3D"gma=
il-im">&gt;&gt; <br>
&gt;&gt; Top of page 13:<br>
&gt;&gt;=C2=A0 =C2=A0 The initiator LSR sends two MPLS echo request message=
s to traverse<br>
&gt;&gt;=C2=A0 =C2=A0 the two LAG members at TTL=3D1:<br>
&gt;&gt; =E2=80=9CTTL=3D1=E2=80=9D should be =E2=80=9CTTL=3Dn=E2=80=9D.<br>
&gt;<br>
</span>&gt;Good catch, fixed.<br><br>At this point in the procedure you hav=
e already reached the node at ttl=3Dn.=C2=A0 You are now probing a LAG that=
 extends to the node at TTL=3Dn+1.=C2=A0 <br><br></div>S0 the text should b=
e &quot;TTL=3Dn+1&quot;.<br><br></div>Thanks,<br><br></div>George<br></div>=
<div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, May 23, 2=
018 at 6:03 AM, Mach Chen <span dir=3D"ltr">&lt;<a href=3D"mailto:mach.chen=
@huawei.com" target=3D"_blank">mach.chen@huawei.com</a>&gt;</span> wrote:<b=
r><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:=
1px #ccc solid;padding-left:1ex">Hi Jon,<br>
<br>
Thanks for the detailed review and useful comments!<br>
<br>
Please see some responses inline...<br>
<br>
&gt; From: Jonathan Hardwick [mailto:<a href=3D"mailto:Jonathan.Hardwick@me=
taswitch.com">Jonathan.Hardwick@<wbr>metaswitch.com</a>]<br>
&gt; Sent: Tuesday, May 22, 2018 3:39 AM<br>
&gt; To: <a href=3D"mailto:draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org"=
>draft-ietf-mpls-lsp-ping-lag-<wbr>multipath@ietf.org</a>; <a href=3D"mailt=
o:mpls@ietf.org">mpls@ietf.org</a>; mpls-<br>
&gt; <a href=3D"mailto:chairs@ietf.org">chairs@ietf.org</a><br>
&gt; Cc: <a href=3D"mailto:rtg-dir@ietf.org">rtg-dir@ietf.org</a><br>
&gt; Subject: Routing directorate review of draft-ietf-mpls-lsp-ping-lag-<w=
br>multipath-03<br>
<div><div class=3D"h5">&gt; <br>
&gt; Hello<br>
&gt; <br>
&gt; I have been selected to do a routing directorate =E2=80=9Cearly=E2=80=
=9D review of this draft.<br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-mpls-lsp-ping-l=
ag-multipath/" rel=3D"noreferrer" target=3D"_blank">https://datatracker.iet=
f.org/<wbr>doc/draft-ietf-mpls-lsp-ping-<wbr>lag-multipath/</a><br>
&gt; <br>
&gt; The routing directorate will, on request from the working group chair,=
 perform<br>
&gt; an =E2=80=9Cearly=E2=80=9D review of a draft before it is submitted fo=
r publication to the<br>
&gt; IESG.=C2=A0 The early review can be performed at any time during the d=
raft=E2=80=99s<br>
&gt; lifetime as a working group document.=C2=A0 The purpose of the early r=
eview<br>
&gt; depends on the stage that the document has reached.=C2=A0 As this docu=
ment is close<br>
&gt; to working group last call, my focus for the review was to determine w=
hether<br>
&gt; the document is ready to be published.=C2=A0 Please consider my commen=
ts along<br>
&gt; with the other working group last call comments.<br>
&gt; <br>
&gt; For more information about the Routing Directorate, please see <br>
&gt; <a href=3D"http://trac.tools.ietf.org/area/rtg/trac/wiki/RtgDir" rel=
=3D"noreferrer" target=3D"_blank">http://trac.tools.ietf.org/<wbr>area/rtg/=
trac/wiki/RtgDir</a><br>
&gt; <br>
&gt; Best regards<br>
&gt; Jon<br>
&gt; <br>
&gt; <br>
&gt; Document: draft-ietf-mpls-lsp-ping-lag-<wbr>multipath-03.txt<br>
&gt; Reviewer: Jonathan Hardwick<br>
&gt; Review Date: 21 May 2018<br>
&gt; Intended Status: Standards Track<br>
&gt; <br>
&gt; Summary<br>
&gt; This document looks ready for working group last call.=C2=A0 I have a =
few minor<br>
&gt; issues that I am sure can be resolved during the last call.<br>
&gt; <br>
&gt; <br>
&gt; Section 2<br>
&gt; First paragraph: the reference to section 3.3 of [RFC8029] looks wrong=
.=C2=A0 Should<br>
&gt; it be a reference to section 4?<br>
<br>
</div></div>It was intended to refer to Section 3.3 RFC4079 (Downstream Map=
ping). <br>
<br>
How about the following text:<br>
&quot;Reader is expected to be familiar with mechanics of Downstream Mappin=
g described in Section 3.3 of RFC8029 and Downstream Detailed Mapping TLV (=
DDMAP) described in Section 3.4 of RFC8029.&quot;<br>
<span class=3D""><br>
<br>
&gt; <br>
&gt; Section 3<br>
&gt; =E2=80=9CWhen the responder LSR receives an MPLS echo reply message=E2=
=80=9D &lt;- you mean<br>
&gt; =E2=80=9CMPLS echo request message=E2=80=9D.<br>
<br>
</span>Yes.<br>
<span class=3D""><br>
&gt; <br>
&gt; Section 5.1<br>
&gt; This is fine, but I found it a bit cumbersome to read.=C2=A0 How about=
 this rewording?<br>
&gt; NEW<br>
&gt;=C2=A0 =C2=A0If the downstream LSR does not return Remote Interface Ind=
ex sub-TLVs in<br>
&gt;=C2=A0 =C2=A0the DDMAP, then the initiator LSR validates LAG member lin=
k traversal by<br>
&gt;=C2=A0 =C2=A0traversing all available LAG member links and then using t=
he procedure<br>
&gt; described<br>
&gt;=C2=A0 =C2=A0below.=C2=A0 This section provides the mechanism for the i=
nitiator LSR to obtain<br>
&gt; additional information from the downstream LSRs and describes the addi=
tional<br>
&gt; logic in the initiator LSR to validate the L2 ECMP traversal.<br>
&gt; END<br>
<br>
</span>This looks good to me, thanks for the new text!<br>
<span class=3D""><br>
&gt; <br>
&gt; Section 5.1.3<br>
&gt; For my interest, why are you using =E2=80=9Centropy=E2=80=9D here?=C2=
=A0 It sounds like you mean<br>
&gt; =E2=80=9Cprobability=E2=80=9D, but I might have misunderstood your mea=
ning.<br>
<br>
</span>The &quot;entropy&quot; is used to select specific LAG member link, =
it has the similar concept as &quot;entropy label&quot;. <br>
<span class=3D""><br>
&gt; <br>
&gt; Top of page 13:<br>
&gt;=C2=A0 =C2=A0 The initiator LSR sends two MPLS echo request messages to=
 traverse<br>
&gt;=C2=A0 =C2=A0 the two LAG members at TTL=3D1:<br>
&gt; =E2=80=9CTTL=3D1=E2=80=9D should be =E2=80=9CTTL=3Dn=E2=80=9D.<br>
<br>
</span>Good catch, fixed.<br>
<span class=3D""><br>
&gt; <br>
&gt; Section 6<br>
&gt; Typo =E2=80=9Cin the in the=E2=80=9D<br>
<br>
</span>Fixed.<br>
<span class=3D""><br>
&gt; <br>
&gt; Section 8 and 9<br>
&gt; This draft only discusses using the new Local &amp; Remote Interface I=
ndex Sub-<br>
&gt; TLVs in the context of a DDMAP for a LAG interface, so I was surprised=
 to read<br>
&gt; that it is permissible to set M=3D0 in these TLVs.=C2=A0 You should de=
scribe how the<br>
&gt; TLV is used in that case, if you are going to allow it.<br>
&gt; Does the M flag need to be set consistently in all Local &amp; Remote =
Interface<br>
&gt; Index Sub-TLVs=C2=A0 in a given DDMAP TLV?<br>
&gt; In fact, isn=E2=80=99t the M flag redundant, given that the enclosing =
DDMAP has the<br>
&gt; &quot;LAG Description Indicator flag&quot;?<br>
<br>
</span>Indeed, seems redundant, I will do double check on it. <br>
<span class=3D""><br>
&gt; <br>
&gt; Section 10<br>
&gt; Why do you need the Sub-TLV length field?=C2=A0 It can be inferred fro=
m the TLV<br>
&gt; length and the address type.<br>
<br>
</span>Indeed, and I personally agree, I will talk to the co-authors, if th=
ere is no further reasons, will remove the sub-TLV length field.<br>
<span class=3D""><br>
&gt; Section 10.1.1 =E2=80=93 if the LSR received no labels (e.g. PHP case)=
 then should it omit<br>
&gt; this sub-TLV, or include an empty sub-TLV?<br>
<br>
</span>The sub-TLV is derived from Label Stack Sub-TLV defined in 8029, it =
has the same usage as Label Stack Sub-TLV. So, for that case, the sub-TLV s=
hould be included and an Implicit Null label returned. <br>
<span class=3D""><br>
&gt; <br>
&gt; Other nits<br>
&gt; Throughout, English grammar needs to be fine-tuned e.g. there are defi=
nite<br>
&gt; and indefinite articles missing.=C2=A0 However, I found the document p=
erfectly<br>
&gt; readable, so perhaps this can be left for the RFC editor.<br>
<br>
</span>Sure, thanks.<br>
<br>
Best regards,<br>
Mach<br>
</blockquote></div><br></div>

--0000000000001beb9c056cf36b17--


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Subject: [mpls] FW: WG Last Call for draft-ietf-spring-segment-routing-mpls-13
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Hi MPLS WG, MPLS chairs,

The SPRING WG is starting the working group last call on draft-ietf-spring-=
segment-routing-mpls-13.

This document instantiates the generic segment routing architecture on the =
MPLS data plane.
This document is expected to be in line with the MPLS architecture and to n=
ot change the MPLS data plane.

You may want to review it. Please send your comments to the _SPRING_ mailin=
g list.

Thank you,
Bruno

From: bruno.decraene@orange.com [mailto:bruno.decraene@orange.com]
Sent: Thursday, May 24, 2018 7:14 PM
To: SPRING WG List
Cc: draft-ietf-spring-segment-routing-mpls@ietf.org
Subject: WG Last Call for draft-ietf-spring-segment-routing-mpls-13


Hello Working Group,



This email starts a Working Group Last Call on draft-ietf-spring-segment-ro=
uting-mpls-13 [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 *June 08*.



As a reminder, this document had already passed a WGLC more than a year ago=
 on version -06 [2], had been sent to the AD but then returned to the WG.

Since then, the document has significantly changed, so please read it again=
. In particular, it now includes the resolution in case of incoming label c=
ollision. Hence it killed draft-ietf-spring-conflict-resolution.



Both co-chairs co-author this document, hence:

- Shraddha has agreed to be the document shepherd. Thank you Shraddha.

- Martin, our AD, has agreed to evaluate the WG consensus.



Thank you,

Bruno, Rob



[1] https://tools.ietf.org/html/draft-ietf-spring-segment-routing-mpls-13

[2] https://mailarchive.ietf.org/arch/msg/spring/STiYsQJWuVXA1C9hK4BiUnyMu7Y



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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Hi MPLS WG, MP=
LS chairs,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">The SPRING WG =
is starting the working group last call on draft-ietf-spring-segment-routin=
g-mpls-13.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">This document =
instantiates the generic segment routing architecture on the MPLS data plan=
e.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">This document =
is expected to be in line with the MPLS architecture and to not change the =
MPLS data plane.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">You may want t=
o review it. Please send your comments to the _<i>SPRING</i>_ mailing list.=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Thank you,<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black">Bruno<o:p></o:=
p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:black"><o:p>&nbsp;</o=
:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;;mso-fareast-language:FR">From:</span><=
/b><span style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;san=
s-serif&quot;;mso-fareast-language:FR"> bruno.decraene@orange.com [mailto:b=
runo.decraene@orange.com]
<br>
<b>Sent:</b> Thursday, May 24, 2018 7:14 PM<br>
<b>To:</b> SPRING WG List<br>
<b>Cc:</b> draft-ietf-spring-segment-routing-mpls@ietf.org<br>
<b>Subject:</b> WG Last Call for draft-ietf-spring-segment-routing-mpls-13<=
o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<pre><span lang=3D"EN-US">Hello Working Group,<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp;&nbsp; <o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">This email starts a Working Group Last Call on dr=
aft-ietf-spring-segment-routing-mpls-13 [1] which is considered mature and =
ready for a final working group review.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp;&nbsp; <o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">Please read this document if you haven't read the=
 most recent version yet, and send your comments to the list, no later than=
 *June 08*.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US">As a reminder, this document had already passed a=
 WGLC more than a year ago on version -06 [2], had been sent to the AD but =
then returned to the WG.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">Since then, the document has significantly change=
d, so please read it again. In particular, it now includes the resolution i=
n case of incoming label collision. Hence it killed draft-ietf-spring-confl=
ict-resolution.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US">Both co-chairs co-author this document, hence:<o:=
p></o:p></span></pre>
<pre><span lang=3D"EN-US">- Shraddha has agreed to be the document shepherd=
. Thank you Shraddha.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">- Martin, our AD, has agreed to evaluate the WG c=
onsensus.<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp;&nbsp; <o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">Thank you,<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">Bruno, Rob<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></pre>
<pre><span lang=3D"EN-US">[1] <a href=3D"https://tools.ietf.org/html/draft-=
ietf-spring-segment-routing-mpls-13">https://tools.ietf.org/html/draft-ietf=
-spring-segment-routing-mpls-13</a><o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">[2] <a href=3D"https://mailarchive.ietf.org/arch/=
msg/spring/STiYsQJWuVXA1C9hK4BiUnyMu7Y">https://mailarchive.ietf.org/arch/m=
sg/spring/STiYsQJWuVXA1C9hK4BiUnyMu7Y</a><o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"font-family:&quot;Arial&quot;,&quot;sans=
-serif&quot;"><o:p>&nbsp;</o:p></span></pre>
</div>
<PRE>______________________________________________________________________=
___________________________________________________

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From: Mach Chen <mach.chen@huawei.com>
To: George Swallow <swallow.ietf@gmail.com>
CC: Jonathan Hardwick <Jonathan.Hardwick@metaswitch.com>, "draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org" <draft-ietf-mpls-lsp-ping-lag-multipath@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>
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From: "Zafar Ali (zali)" <zali@cisco.com>
To: =?utf-8?B?5b6Q5bCP6JmOICAo5LmJ5YWIKQ==?= <xiaohu.xxh@alibaba-inc.com>, mpls <mpls-bounces@ietf.org>, draft-ietf-mpls-sfc <draft-ietf-mpls-sfc@ietf.org>
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Thread-Topic: [sfc] [mpls] Comments on draft-ietf-mpls-sfc-01
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From: Abhishek Deshmukh <adeshmukh@juniper.net>
To: "mpls@ietf.org" <mpls@ietf.org>
CC: "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "draft-esale-mpls-ldp-rmr-extensions@ietf.org" <draft-esale-mpls-ldp-rmr-extensions@ietf.org>
Thread-Topic: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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Subject: Re: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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From: Kireeti Kompella <kireeti@juniper.net>
To: Abhishek Deshmukh <adeshmukh@juniper.net>, "mpls@ietf.org" <mpls@ietf.org>
CC: "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "draft-esale-mpls-ldp-rmr-extensions@ietf.org" <draft-esale-mpls-ldp-rmr-extensions@ietf.org>, Kireeti Kompella <kireeti@juniper.net>
Thread-Topic: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/HkJUw0cCJvYh9dO1KZixWD7UGVg>
Subject: Re: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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From: Ravi Singh <ravis@juniper.net>
To: Kireeti Kompella <kireeti@juniper.net>, Abhishek Deshmukh <adeshmukh@juniper.net>, "mpls@ietf.org" <mpls@ietf.org>
CC: Kireeti Kompella <kireeti@juniper.net>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "draft-esale-mpls-ldp-rmr-extensions@ietf.org" <draft-esale-mpls-ldp-rmr-extensions@ietf.org>
Thread-Topic: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/v2PlBs18T1ENeThRA5Xc4IrPuJI>
Subject: Re: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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From: Santosh Easale <sesale@juniper.net>
To: Loa Andersson <loa@pi.nu>, "mpls@ietf.org" <mpls@ietf.org>
CC: "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, "draft-esale-mpls-ldp-rmr-extensions@ietf.org" <draft-esale-mpls-ldp-rmr-extensions@ietf.org>
Thread-Topic: IPR poll on draft-esale-mpls-ldp-rmr-extensions
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mpls/rv7JSSg59iy83A7Rynojhc9ho7Q>
Subject: Re: [mpls] IPR poll on draft-esale-mpls-ldp-rmr-extensions
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From nobody Wed May 30 13:40:15 2018
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Date: Wed, 30 May 2018 13:40:13 -0700
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Subject: [mpls] The MPLS WG has placed draft-esale-mpls-ldp-rmr-extensions in state "Candidate for WG Adoption"
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The MPLS WG has placed draft-esale-mpls-ldp-rmr-extensions in state
Candidate for WG Adoption (entered by Loa Andersson)

The document is available at
https://datatracker.ietf.org/doc/draft-esale-mpls-ldp-rmr-extensions/

