Gunter Van de Velde has entered the following ballot position for
draft-ietf-spring-srv6-security-17: No Objection

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COMMENT:
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# Gunter Van de Velde, RTG AD, comments for review of
draft-ietf-spring-srv6-security-17

# Many thanks to Henning Rogge and Andrew Alston for the RTGDIR review.

# Thanks for the nice useful writeup. While reviewing i found two easy to
resolve items to discuss and few observations you may want to comment upon.

# Through the document please replace the reference to the "last SRH entry"
with an explicit field expression. For an ordinary uncompressed SRH, the final
policy segment is Segment List[0], not the entry indexed by Last Entry. Please
also look into guidance for packets without an SRH and for compressed segment
lists. A general instruction to read one SRH entry does not cover those cases,
and that should be made explicit within the text.

# Within Sections 1 and 3: Make SRH optionality clear from the introduction.
Please describe SRv6 as "potentially" using an SRH. This will align the opening
explanation with the later filtering discussion and avoid suggesting that SRH
detection identifies all SRv6 traffic.

# Section 2: Explain how the listed specifications were assessed.
RFC 9491 and RFC 9524 are identified as part of the assessment, but their
specific behaviors deserve a short explicit explanation of how the general
analysis covers them.

# Section 6.3.2: Cite the SRv6-specific MSD definitions.
It is correct that RFC 8476 supplies the OSPF MSD advertisement framework, but
it is insufficient as the sole reference for the SRv6 example.

For completeness you could consider to add RFC 9352, Section 4, and RFC 9513,
Section 4. They distinguish Maximum Segments Left, Maximum End Pop, Maximum
H.Encaps, and Maximum End D MSD types.

Brgds,
Gunter Van de Velde
Routing Area Director



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