On Tue, Mar 5, 2019 at 10:08 PM Joe Touch <[email protected]> wrote:
>
> Isn't the biggest problem with IP fragmentation the inability to NAT
> because the transport headers are in the first fragment only (which may
> go via another path)?
>

Joe,

The size of the IP identifier is mentioned as one of the problems with
IPv4 fragmentation in draft-ietf-intarea-frag-fragile. The fact that
intermediate nodes might fragment in IPv4 and not in IPv6 is another
discrepancy between the protocols. The transport layer not in all
fragments is a problem for NAT, that might addressed by encapsulating
the fragmention in UDP.

Tom

> I.e., 6864 already relaxes the ID field to allow reuse as long as it's
> not within expected reordering, overcoming the speed limit.
>
> Joe
>
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