[Libvir] update after changing XML

Maxwell Bottiger maxwell.bottiger at itt.com
Tue Jan 29 19:53:57 UTC 2008

Thank you very much for your help.  I have submitted a bugzilla report
asking to update the documentation to fix the bridging XML problem, as
well as perhaps look at the associated error message.

At this point I have my ethernet bridge br0 configured with the IP and my host network looks great.  When I start qemu the
vnet0 adapter is added to the system, and added to br0.  My guest copy
of linux comes up with one ethernet adapter called eth0 and I set the
guest ethernet address to

With all this in place however the guest machine cannot see the network.
Am I still missing a configuration step?

On Tue, 2008-01-29 at 17:59 +0000, Daniel P. Berrange wrote:
> On Tue, Jan 29, 2008 at 05:57:51PM +0000, Richard W.M. Jones wrote:
> > Richard W.M. Jones wrote:
> > >My bridge section looks like this:
> > >
> > >    <interface type='bridge'>
> > >      <source dev='br0'/>
> > >      <target dev='vnet7'/>
> > >      <mac address="11:22:33:44:EE:FC"/>
> > >    </interface>
> > >
> > >Do I need to create the vnet7 device before hand?  I thought this might be
> > >something libvirt created on startup.  Or, is the define error related to
> > >something else?  My current XML file appears to be well formed.
> >
> > Looking at the code, I think the error message is misleading.  In fact
> > the problem appears to be that you need to have:
> >
> >      <interface type='bridge'>
> >        <source bridge='br0'/>  <!-- NB -->
> >        <target dev='vnet7'/>
> >        <mac address="11:22:33:44:EE:FC"/>
> >      </interface>
> >
> > Dan is this intended behaviour or a bug?
> The error message is wrong - the syntax you show with bridge='br0' is
> the intended format.
> Regards,
> Dan.

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