Last Call Review of draft-ietf-idr-cpr-07
review-ietf-idr-cpr-07-opsdir-lc-dunbar-2025-02-07-00

I have reviewed this document as part of the Ops area directorate's ongoing
effort to review all IETF documents being processed by the IESG.  These
comments were written primarily for the benefit of the Ops area directors.
Document editors and WG chairs should treat these comments just like any other
last-call comments.

The document is written very clear.
However, I have a few questions. Hope the authors can answer:
1) The draft mentions that color values may need to be mapped differently
across AS boundaries but does not specify how operators should coordinate
color-mapping policies. For example: If AS1 represents "low latency" as color
10, but AS2 uses color 20 for the same intent, how is policy coordination
ensured?

2) The draft does not specify how CPR interacts with the BGP Best Path
Selection process when multiple paths exist with different colors. If an AS
receives multiple CPR advertisements for the same prefix but with different
colors, how does the AS decide which path to prefer?

Thank you very much!

Linda Dunbar