Telechat Review of draft-ietf-6man-snac-router-ra-flag-02
review-ietf-6man-snac-router-ra-flag-02-intdir-telechat-zuniga-2024-11-26-00

I am an assigned INT directorate reviewer for
https://datatracker.ietf.org/doc/html/draft-ietf-6man-snac-router-ra-flag-02
These comments were written primarily for the benefit of the Internet Area
Directors. Document editors and shepherd(s) should treat these comments just
like they would treat comments from any other IETF contributors and resolve
them along with any other Last Call comments that have been received. For more
details on the INT Directorate, see
https://datatracker.ietf.org/group/intdir/about/

The document defines a new IPv6 ND Router Advertisement (RA) flag, the "SNAC
router" flag, which SNAC routers use to identify RAs sent by other SNAC
routers. This is a rather simple (although incomplete at the moment,
potentially waiting for IANA assignment) definition of a flag.

According to reference [draft-ietf-snac-simple-05], the flag is a bit inside
the RA flags field. For completeness, I think the full definition should be
included in a single document (e.g., in this document
draft-ietf-6man-snac-router-ra-flag), and not duplicated.

The behaviour of the SNAC router to use this flag is defined in reference
[draft-ietf-snac-simple-05]. On the other hand, some behaviour of non-SNAC
routers is described in this document draft-ietf-6man-snac-router-ra-flag. I’m
not sure if this behaviour modifies/updates RFC 4681 and 5175? If so, more
information is needed. If not, a reference would be more appropriate.