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IPv6 day and tunnels

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