Document: draft-ietf-intarea-icmp-exten-hdr-len Title: ICMP Extension Structure Length Field Reviewer: Linda Dunbar Review result: Ready with Nits I am the assigned Gen-ART reviewer for this draft. The General Area Review Team (Gen-ART) reviews all IETF documents being processed by the IESG for the IETF Chair. Please treat these comments just like any other last call comments. For more information, please see the FAQ at <https://wiki.ietf.org/en/group/gen/GenArtFAQ>. Document: draft-ietf-intarea-icmp-exten-hdr-len-5 Reviewer: Linda Dunbar Review Date: 2025-08-05 IETF LC End Date: 2025-08-12 IESG Telechat date: Not scheduled for a telechat Summary: The document is well written and very clear on adding a new Length field to the ICMP messages Major issues: None Minor issues: None Nits/editorial comments: Some legacy network devices may drop ICMP messages that contain non‑zero values in previously reserved bits, despite RFC 4884’s recommendation that receivers MUST ignore them. Recommendation: In Section 4 (Backwards Compatibility), explicitly note that some non‑compliant RFC 4884 implementations may drop messages when reserved bits are non-zero. Best Regards, Linda Dunbar -- last-call mailing list -- last-call@xxxxxxxx To unsubscribe send an email to last-call-leave@xxxxxxxx
