On Wed, Aug 08, 2001 at 10:22:22AM -0400, Mike Tancsa wrote:
>
> Just wondering, is there a reason why the MTU of the gif interface defaults
> to 1280 ? Why not 1500 ?
It can't be 1500 because the tunneling protocol is designed to use an
MTU which insures that packets don't get fragmented (except in one weird
edge case.) Since there is a wrapping IP header, the MTU of an IP over
IP tunnel can be no more then 1480 in the common case.
-- Brooks
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