Re: [Xen-users] MTU-1492 Permenent Setting for Xen Specific Interfaces

[J D Freeman <xen@xxxxxxxxxxxxxxx>]

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On Tue, Dec 20, 2005 at 08:58:25AM +0100, Erik wrote:
> Steven,
> 
> Why would you want to change the MTU, som applications won't like a non 
> standard (<1500) MTU, we use a MTU of 1504 on our 802.1q interface (an e1000)
> in Dom0 to bridge vlan interfaces to domU and preserve a 1500 byte mtu, mtu 
> 1504 should work without setting it as the kernel support 802.1q framing
> (1500 byte + 4 byte vlan tag).


The main reason you would want to lower the MTU like this is when using
something like PPPoE as part of an ADSL router.

If you have the right settings in iptables, linux doesn't care about the
lower MTU.

HTH

J
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