On Thu, 26 Mar 2009 15:59:08 -0400, Michael DeHaan
<mdehaan(a)redhat.com>
wrote:
> virbr0 as created by libvirt is a private network, it's not a real
>
bridge.
> If you want your guests to be reachable, you need to create a real
> bridge on your virtual hosts and use that as the --virt-bridge in
>
Cobbler.
> Instructions are here:
>
>
https://fedorahosted.org/cobbler/wiki/VirtNetworkingSetupForUseWithKoan
>
> Making a snippet that automatically makes a bridge for the first
> interface seems like a nice thing to do (or finding some way to do this
> with interface objects).
>
> --Michael
>
FWIW, I run xen on RHEL5.2 and this is all pretty much setup for you there.
The networking scripts handle the creation of the "bridge" for you, but I
believe it is still up to you to setup the sysctl/iptables correctly so
that natting/forwarding work. It's been a few months since I got it setup
though, so I forget if I had to do any voodoo, but I have my vm's hiding
quietly behind a private network here at work (the desktop team does not
appreciate rogue dhcp servers breaking things...)
Yes,
xenbr0 is a real bridge.
If you have that, using xenbr0 is fine. I'll update the docs to make
that clearer.
--Michael