Re: Last Call: <draft-ietf-6man-rfc1981bis-04.txt> (Path MTU Discovery f

On 2017-2-9, at 8:39, otroan(_at_)employees(_dot_)org wrote:
> "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. This is one significant
> example of how PMTUD is broken on the Internet."
Like it.

Might be worthwhile to point at PLPMTUD as something that works, if the 
app/service meets its requirements.

Lars

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