Re: [RFC] "CIPE ethernet devices should have an MTU of 1500"|
Lennert Buytenhek <buytenh,AT,gnu,DOT,org>|
Tue, 13 Nov 2001 19:44:27 +0100|
On Tue, Nov 06, 2001 at 08:56:34PM +0100, Olaf Titz wrote:
> > group, the CIPE device will have to 'emulate' an MTU of 1500, since a lot
> > things downright depend on this. IMHO, the fact that this causes
> > fragmentation at the UDP level is secondary. For a vanilla IP tunnel I'll
> > buy the argument that not fragmenting the encrypted-and-encapsulated
> > packet is important, but in the case of ethernet, I think the MTU
> > is sacred.
> > Opinions?
> > I'm using the attached (shoddy) patch for this. If people agree with me
> > this I'll make a clean patch, conditional on the protocol version et al.
> That needs a configuration option, IMHO, since it is one of the things
> people might legitimately want either way.
Oh? Can you give an example? I honestly can't imagine you would want
to have an ethernet device have an MTU < 1500, but then again, that could