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Re: [Xen-users] VLANs in domU?

On Thu, Jun 25, 2009 at 3:11 AM, Peter Mellon<knascent@xxxxxxxxx> wrote:
> Hello,
> I'm using Xen 3.1 that comes with the Fedora 7 DVD. It turns out that it
> only supports 3 network interfaces in domU,

F7 is old and supported. If you want to try out Xen on live CD, you'd
be better with Xen Live CD :P

> so I want to try making VLANs in
> domU to compensate. Here is my setup:

> Computer B dom0 (Xen 3.0 installed)
> ---eth0 (physical)
> ---eth0.400 (VLAN)
> ---vif1.0
> ---br0 (bridges eth0.400 and vif1.0)
> Computer B domU
> ---eth0 (bound to vif1.0)
> ---eth0.400 (VLAN) ---

That won't work. If you've already carved out vlan400 in dom0, then
domU won't have it. You should either :
- use vlan ONLY in dom0, and bridge the vlan interface, or
- use vlan ONLY in domU, and bridge the trunk

Note that lots of things can also go wrong, like NIC driver not
supporting vlan+bridge. You'd be better off with recent OS/kernel
where many bugs have been fixed. Plus you're no longer limited to
3-NIC on domU.


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