Subject: Re: Xen & VLANs
To: Sebastian <>
From: Matthias Scheler <>
List: port-xen
Date: 05/03/2007 15:34:47
On Thu, May 03, 2007 at 04:10:58PM +0200, Sebastian wrote:
> Matthias Scheler schrieb:
> >> The parent interface is a normal rtk ethernet interface.
> > 
> > Change its MTU to 1504 bytes and change the MTU of the VLAN interfaces
> > to 1500 bytes afterwards.
> But it seems that I can't change the MTU of the rtk interface to more
> then 1500 Bytes.
> "ifconfig: SIOCSIFMTU: Invalid argument"

It looks like rtk(4) devices don't support that (no big surprise there).
I'm sorry but you have to get a decent ethernet card.

See e.g. ex(4) (using "man 4 ex"), epic(4) or fxp(4) for 100Mb/s NICs
which support that. Or buy a Gigabit Ethernet card preferably with an
Intel chip supported by wm(4) or a RealTek card supported by re(4) if
you are on a really tight Budget.

	Kind regards

Matthias Scheler