Iljitsch van Beijnum wrote: > But with IPv6 we have a new chance to punish the people creating > the problem rather than the ones implementing PMTUD properly, > so The Right Thing To Do is NOT fix any PMTUD breakage in > properly behaving systems, but rather push people that > configure their systems incorrectly to fix this. Let's see the reality. IPv6 is broken to request packet too big ICMPs must be generated even against multicast packets, which causes serious periodic ICMP implosions when MTUs are, because of tunneling, below 1500 near many receivers and is 1500 at a sender and other part of the network. It means that rational operators MUST filter some ICMP and, not surprisingly, some operators will block all ICMP or all packet too big ICMPs, which means PMTUD won't work. Who are the people to be punished for creating the problem? Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf