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Re: [spring] Chair Review of draft-ietf-spring-srv6-srh-compression-11

Robert Raszuk <robert@raszuk.net> Mon, 25 March 2024 16:40 UTC

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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 25 Mar 2024 17:40:38 +0100
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To: Andrew Alston - IETF <andrew-ietf@liquid.tech>
Cc: Tom Herbert <tom=40herbertland.com@dmarc.ietf.org>, Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>, "spring@ietf.org" <spring@ietf.org>
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Subject: Re: [spring] Chair Review of draft-ietf-spring-srv6-srh-compression-11
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Actually looking at this from the perspective where SRH may be omitted I
see in the subject draft this clearly stated:

A source node steers a packet into an SR Policy. *If the SR Policy results
in a Segment List containing a single segment*, and there is no need to add
information to the SRH flag or add TLV; the DA is set to the single Segment
List entry, and the SRH MAY be omitted.¶
<https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-srh-compression#section-6.2-13.1>

That to me indicated that host computed checksum will be correct all along
the transit nodes. So no issue either here.

Could someone illustrate with a drawing of packet's traversing the
network their assumed header format and forseen issues ?

Thx,
R,

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