Hi,

I have reviewed draft-shore-icmp-aup-09 on behalf of the OPS DIR and believe the document is Ready.

I believe the guidance presented in the document is useful to publish, and having the consensus on the subject written up provides a useful point of reference when certain uses of ICMP are proposed in future draft documents.

A couple of non-blocking nits:

1. One might add at the end of Section 2.3 that filtering of ICMPv6 Packet Too Big messages has caused problems for IPv6 deployment wrt PMTUD, despite the advice of RFC4890. There's actually some good material in RFC4890 on ICMPv6 use cases and issues with its use and its security - is it worth adding a reference to that in this document?

2. I would suggest putting the "AUP" in a separate section, before Section 5, perhaps called "Recommended AUP for ICMP" or similar, making Section 2 called something like "Comments on the existing use of ICMP".  I find the existing structure a little bit odd - I think the recommendation would sit better as the conclusion of the document.  That is just a personal preference however.

Tim