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[spring] Relationship between draft-chen-rtgwg-srv6-midpoint-protection and draft-ietf-spring-segment-protection-sr-te-paths-03

Alexander Vainshtein <Alexander.Vainshtein@rbbn.com> Tue, 08 November 2022 16:50 UTC

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From: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
To: "draft-chen-rtgwg-srv6-midpoint-protection@ietf.org" <draft-chen-rtgwg-srv6-midpoint-protection@ietf.org>, "draft-ietf-spring-segment-protection-sr-te-paths@ietf.org" <draft-ietf-spring-segment-protection-sr-te-paths@ietf.org>
CC: "spring@ietf.org" <spring@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
Thread-Topic: Relationship between draft-chen-rtgwg-srv6-midpoint-protection and draft-ietf-spring-segment-protection-sr-te-paths-03
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Date: Tue, 08 Nov 2022 16:49:36 +0000
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Subject: [spring] Relationship between draft-chen-rtgwg-srv6-midpoint-protection and draft-ietf-spring-segment-protection-sr-te-paths-03
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Hi,
There is some obvious similarity between the problem addressed in  the (expired) draft-ietf-spring-segment-protection-sr-te-paths-03<https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-protection-sr-te-paths-03> and draft-chen-rtgwg-srv6-midpoint-protection<https://datatracker.ietf.org/doc/html/draft-chen-rtgwg-srv6-midpoint-protection-09>.
In the general case, the solutions seem to be quite different because the former draft uses MPLS-specific mechanisms (context label spaces etc.) that are not available with SRv6.
But Section 6 of the  former draft<https://datatracker.ietf.org/doc/html/draft-ietf-spring-segment-protection-sr-te-paths-03#section-6> offers a simple optimization for the special case that looks to me as matching the needs of the latter draft.
If this is indeed so, it would be nice to specify this explicitly in one (or even both) of the drafts.

If this is not so, I would really appreciate the explanation.

Regards, and lots of thanks in advance,
Sasha


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