Re: [Idr] Éric Vyncke's No Objection on draft-ietf-idr-bgp-ls-segment-routing-msd-17: (with COMMENT)

"Eric Vyncke (evyncke)" <evyncke@cisco.com> Thu, 07 May 2020 14:17 UTC

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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Alvaro Retana <aretana.ietf@gmail.com>, =?utf-8?B?w4lyaWMgVnluY2tlIHZpYSBEYXRhdHJhY2tlcg==?= <noreply@ietf.org>, "The IESG" <iesg@ietf.org>
CC: Susan Hares <shares@ndzh.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "draft-ietf-idr-bgp-ls-segment-routing-msd@ietf.org" <draft-ietf-idr-bgp-ls-segment-routing-msd@ietf.org>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] =?utf-8?q?=C3=89ric_Vyncke=27s_No_Objection_on_draft-ietf-?= =?utf-8?q?idr-bgp-ls-segment-routing-msd-17=3A_=28with_COMMENT=29?=
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Jeff,

I still have some suggested changes / improvements (nothing blocking of course but in the line that this document will / should support SRv6 in the long term), updated based on Alvaro’s reply :

-- Section 1 --
In "doesn't exceed the number of SIDs the node is capable of imposing.", is it "imposing" or "processing" ? Esp. when section 1.1.1 uses the word "supported" and "label imposition" does not really fit SRv6.

If this document is only about SR-MPLS, then suggest to change title, abstract, and introduction to reflect this focus and most of my comments fall off.

-- Section 3 --
Unsure whether "MSD values may be learned via a hardware API or may be provisioned. " provides any added value.

While it is unclear to me whether this document applies only to SR-MPLS, but, if it applies also to SRv6, then is it required to be able to advertise to MSD per node ? One for SR-MPLS and one for SRv6?

Hope this helps to improve the document

-éric


From: Jeff Tantsura <jefftant.ietf@gmail.com>
Date: Thursday, 7 May 2020 at 00:00
To: Alvaro Retana <aretana.ietf@gmail.com>om>, Éric Vyncke via Datatracker <noreply@ietf.org>rg>, The IESG <iesg@ietf.org>rg>, Eric Vyncke <evyncke@cisco.com>
Cc: Susan Hares <shares@ndzh.com>om>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>rg>, "draft-ietf-idr-bgp-ls-segment-routing-msd@ietf.org" <draft-ietf-idr-bgp-ls-segment-routing-msd@ietf.org>rg>, "idr@ietf.org" <idr@ietf.org>
Subject: Re: Éric Vyncke's No Objection on draft-ietf-idr-bgp-ls-segment-routing-msd-17: (with COMMENT)

Eric,

Many thanks for your review and comment.
Great to see - Alvaro has addressed all your questions!

Please let me know if there’s anything else.

Cheers,
Jeff
On May 6, 2020, 2:57 PM -0700, Eric Vyncke (evyncke) <evyncke@cisco.com>om>, wrote:

Alvaro

Thank you for the added piece of information. This clarifies a lot my questions/comments.

Very much appreciated,

Regards

-éric

-----Original Message-----
From: Alvaro Retana <aretana.ietf@gmail.com>
Date: Wednesday, 6 May 2020 at 23:32
To: Éric Vyncke via Datatracker <noreply@ietf.org>rg>, Eric Vyncke <evyncke@cisco.com>om>, The IESG <iesg@ietf.org>
Cc: Susan Hares <shares@ndzh.com>om>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>rg>, "draft-ietf-idr-bgp-ls-segment-routing-msd@ietf.org" <draft-ietf-idr-bgp-ls-segment-routing-msd@ietf.org>rg>, "idr@ietf.org" <idr@ietf.org>
Subject: Re: Éric Vyncke's No Objection on draft-ietf-idr-bgp-ls-segment-routing-msd-17: (with COMMENT)

On May 6, 2020 at 10:43:51 AM, Éric Vyncke wrote:


Eric:

Hi!

...

While it is unclear to me whether this document applies only to SR-MPLS, but,
if it applies also to SRv6...


This document is about the ability to carry the MSD in BGP-LS. The
applicability to SR-MPLS and/or SRv6 depends on the type of MSD
carried -- and with it any requirements about how to advertise, etc.

Right now there are only 2 MSD-Types defined, and both are related to
SR-MPLS [1].

If more types are defined, then those documents will have to describe
how the contents should behave and what they mean.


Thanks!

Alvaro.


[1] https://www.iana.org/assignments/igp-parameters/igp-parameters.xhtml#igp-msd-types