Peter Yee wrote:
Summary: This draft is almost ready for publication as a proposed
standard but has open issues, described in the review.
The draft is totally broken, because ICMPv6 PTB generated against
a 1280B packet, port numbers of which is located at very end
of the packet, lacks the port numbers, which makes transport
layer PMTUD fail.
If a firewall exists and the ICMPv6 is generated behind the
firewall, the firewall will likely drop the ICMPv6, because
it can not recognize the transport identity of the inner
packet, but that is a minor issue.
The essential problem is that transport layer PMTUD can not get
proper information from ICMPv6.
Though there are other causes to make PMTUD fail, which means
6man should obsolete PMTUD, they don't validate the draft.
Masataka Ohta
PS
ICMPv6 error is, in a sense, IP over IP.