IETF Last Call Review of draft-ietf-intarea-icmp-exten-hdr-len-05
review-ietf-intarea-icmp-exten-hdr-len-05-genart-lc-dunbar-2025-08-05-00

Request Review of draft-ietf-intarea-icmp-exten-hdr-len
Requested revision No specific revision (document currently at 08)
Type IETF Last Call Review
Team General Area Review Team (Gen-ART) (genart)
Deadline 2025-08-12
Requested 2025-07-22
Authors Ron Bonica , hexiaoming , Xiao Min , Tal Mizrahi
I-D last updated 2026-02-21 (Latest revision 2025-08-20)
Completed reviews Genart IETF Last Call review of -05 by Linda Dunbar (diff)
Opsdir IETF Last Call review of -04 by Jen Linkova (diff)
Tsvart IETF Last Call review of -04 by Dr. Joseph D. Touch (diff)
Secdir IETF Last Call review of -05 by Tim Hollebeek (diff)
Assignment Reviewer Linda Dunbar
State Completed
Request IETF Last Call review on draft-ietf-intarea-icmp-exten-hdr-len by General Area Review Team (Gen-ART) Assigned
Posted at https://mailarchive.ietf.org/arch/msg/gen-art/VJ7BUc0BVUl3oY_kr27_Y6Mc2iU
Reviewed revision 05 (document currently at 08)
Result Ready w/nits
Completed 2025-08-05
review-ietf-intarea-icmp-exten-hdr-len-05-genart-lc-dunbar-2025-08-05-00
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