On 10 jul 2011, at 17:20, Masataka Ohta wrote: I was wondering what kind of unique perspective you would have here, and I wasn't disappointed: > It means that rational operators MUST filter some ICMP > and, not surprisingly, some operators will block all > ICMP or all packet too big ICMPs That is more or less ok as long as they don't send any packets larger than 1280 bytes. If you want to send 1281-byte packets you MUST use PMTUD and thus you MUST accept incoming packet too big messages. _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf