> > the assumption made in RFC2461 is that the link MTU is constant
> > over the link, i guess. i don't think it is necessary to make
> > MTU negotiable between peers, it would complicate too many things.
> What would it complicate?
> Obviously nobody is going to force anyone to implement such an option;
> it would only be used between consenting hosts.
you need to have a mechanism if the peer is capable of handling the
option or not (since it is optional, if i read your comment correctly).
then, neighbor cache management has to be changed to handle per-peer
MTU value.
itojun
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