[libvirt] [RFC PATCH] set tap mtu

[Herbert Xu]

On Tue, Nov 18, 2008 at 03:16:14PM +0000, Mark McLoughlin wrote:
>
> My take on it is that it needs to be an opt in thing - if path MTU
> discovery was sufficient to deal with all cases then we'd probably have
> an mtu > 1500 everywhere ... Herbert?

PMTU often breaks due to firewalls.  Also even if you have did
a large MTU it is only effective if the entire path supports it.
So for most peers you'll be using an MTU of 1500 or less.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert at gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt