Iljitsch van Beijnum wrote:
> I was wondering what kind of unique perspective you would
> have here, and I wasn't disappointed:
You always outperform me with your imagination.
>> 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.
That's not an assumption on end users' behavior rational
operators can rely on.
> If you want to send 1281-byte packets you MUST use PMTUD and
> thus you MUST accept incoming packet too big messages.
End users might think they can, but operators won't, accept
them.
Note that it's operators who filter.
Masataka Ohta
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