Re: Last Call: <draft-ietf-6man-rfc1981bis-04.txt> (Path MTU Discovery for IP version 6) to Internet Standard

[Randy Bush <[e-mail]>]

>>>> "Many network security devices block all ICMP messages for perceived
>>>>  security benefits, including the errors that are necessary for the proper
>>>>  operation of PMTUD. This can result in connections that complete the
>>>>  TCP three-way handshake correctly, but then hang when data is transferred.
>>>>  This state is referred to as a black hole connection."
>>>
>>> Yes. What we are asked to do for Internet Standard is show that a protocol
>>> is widely deployed and is interoperable. That's undoubtedly true of RFC1981.
>>> The fact that it also has an important failure mode should certainly be
>>> documented, but I suspect that every Internet Standard has at least
>>> one important failure mode.
>> 
>> the problem is that this particular failure mode is essentially "does
>> not work on the real internet."  perhaps documenting that is useful.
>> but i guess this is ipv6.
> 
> I fully agree that it should be documented, but the details are already
> documented elsewhere. In this document it can be quite short.

i have no problem with terse :)

"Unfortunately, this protocol does not actually work on the real
internet, see \cite{elsewhere}," seems fine to me.

randy