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Re: [Fedora-xen] virbr0 comes from where?



On Sun, Mar 02, 2008 at 10:40:07AM -0500, Tom Horsley wrote:
> Actually I'm on centos, but I figure it probably does things
> similar to fedora. On centos I see a virbr0 bridge that gets
> created and used in clients where I pick virtual network.
> 
> I've been trying to understand Xen networking, and since this
> virbr0 on centos is doing exactly what I tried unsuccessfully
> to do on a debian xen 3.2 system, I thought I'd look and
> see how it works.
> 
> Easy to say, hard to do :-).
> 
> I can't find any place that creates the virbr0 bridge. I don't
> see an ifcfg file to create it at boot time, and I just replaced
> the brctl command with a shell script to log all info about
> brctl calls, then invoke the original brctl, and no brctl command
> is ever issued to create virbr0!
> 
> Where do it come from?

It is the 'default' network shown by:

  virsh net-list

There is no ifcfg file associatwe with it - it is managed directly by
libvirt

Dan.
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