[153318] in North American Network Operators' Group
Re: IPv6 day and tunnels
daemon@ATHENA.MIT.EDU (Masataka Ohta)
Mon Jun 4 20:35:15 2012
Date: Tue, 05 Jun 2012 09:33:01 +0900
From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
To: nanog@nanog.org
In-Reply-To: <4FCD5115.7090003@ttec.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Joe Maimon wrote:
> pMTU has been broken in IPv4 since the early days.
> It is still broken. It is also broken in IPv6. It will likely
> still be broken for the forseeable future. This is
> Relying on ICMP exception messages was always wrong for normal network operation.
Agreed.
The proper solution is to have a field in IPv7 header to
measure PMTU. It can be a 8 bit field, if fragment granularity
is 256B.
Masataka Ohta
