On Mon, 26 Feb 2001, David S. Miller wrote:

> Not to my knowledge.  Routers already change the time to live field,
> so I see no reason why they can't do smart things with special IP
> options either (besides efficiency concerns :-).

A number of ISPs patch the MSS value to 1492 due to the ridiculous number
of PMTU black holes out on the net.  Since the ip header fits in the cache
of some CPUs (like the P4), this becoming a cheaper operation than ever
before.

                -ben

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