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Too bigs are sacred, was: Re: IPv6 addressing for core network



On 9 feb 2011, at 18:30, David Freedman wrote:

> (yes, even ICMP TOOBIG
> can be filtered safely if you have designed things in a sane way)

NO.

Even if you run with 1280-byte MTUs everywhere so you'd think path MTU discovery wouldn't be needed, this can still cause problems with IPv6-to-IPv4 translators.