Early Review of draft-ietf-opsawg-discardmodel-09
review-ietf-opsawg-discardmodel-09-intdir-early-matsushima-2025-11-11-00

Request Review of draft-ietf-opsawg-discardmodel
Requested revision No specific revision (document currently at 12)
Type Early Review
Team Internet Area Directorate (intdir)
Deadline 2025-11-11
Requested 2025-10-17
Requested by Joe Clarke
Authors John Evans , Oleksandr Pylypenko , Jeffrey Haas , Aviran Kadosh , Mohamed Boucadair
I-D last updated 2026-03-14 (Latest revision 2026-03-14)
Completed reviews Yangdoctors Early review of -03 by Ladislav Lhotka (diff)
Opsdir Early review of -09 by Sergio Belotti (diff)
Intdir Early review of -09 by Satoru Matsushima (diff)
Yangdoctors Early review of -10 by Ladislav Lhotka (diff)
Assignment Reviewer Satoru Matsushima
State Completed
Request Early review on draft-ietf-opsawg-discardmodel by Internet Area Directorate Assigned
Posted at https://mailarchive.ietf.org/arch/msg/int-dir/ujrkFfTenh76_b09OPIytBQ-Vbo
Reviewed revision 09 (document currently at 12)
Result Ready w/nits
Completed 2025-11-11
review-ietf-opsawg-discardmodel-09-intdir-early-matsushima-2025-11-11-00
Document: draft-ietf-opsawg-discardmodel
Title: Information and Data Models for Packet Discard Reporting
Reviewer: Satoru Matsushima
Review result: Ready with Nits

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

Overall this draft was well written and well covered various discard cases,
TTL expired, exceed MTU size, uRPF, etc., for example.

Nits:
- It would be better to clarify which counter type should be used for SR-MPLS
cases, either invalid-label, or invalid-sid;

- RFC8704 might be considered as an informational reference for uRPF;

- In addition to uRPF, "ingress filtering" in RFC2827/3704 would cover more
wider discard cases at ingress nodes:

- It would be nice if the draft considered that how many ICMP packets were
send, or suppressed to the corresponding discard events,
  such as TTL expired, exceed MTU size, or rejected by policies.