nanog mailing list archives

RE: IPv6 day and tunnels


From: "Templin, Fred L" <Fred.L.Templin () boeing com>
Date: Mon, 4 Jun 2012 14:55:10 -0700

I just want to know if we can expect IPv6 to devolve into 1280 standard
mtu and at what gigabit rates.

1280 is the minimum IPv6 MTU. If people allow pMTU to work, aka accept
and process ICMPv6 Packet-Too-Big messages everything will just work.

This whole thread is about people who cannot be bothered to know what
they are filtering and that they might just randomly block PtB as they
are doing with IPv4 today. Yes, in that case their network breaks if the
packets are suddenly larger than a link somewhere else, that is the same
as in IPv4 ;)

But, it is not necessarily the person that filters the PTBs
that suffers the breakage. It is the original source that
may be many IP hops further down the line, who would have
no way of knowing that the filtering is even happening.

Thanks - Fred
fred.l.templin () boeing com 

Greets,
 Jeroen



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