On 16.7.2011 2.15, Trey Dockendorf wrote: > Yes, the name matches, the KVM hosts both used br0 on 5.6 and now on 6.0. > Here's what's in the XML file > > <interface type='bridge'> > <mac address='52:54:00:31:6f:16'/> > <source bridge='br0'/> > <target dev='vnet0'/> > <model type='virtio'/> > <alias name='net0'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </interface> I am not sure if yo have the same kind of virtual network structure as I have. Anyway, my xml file (CentOS 5.6 on both host and guest) says simply: <interface type='bridge'> <mac address='54:52:00:3d:aa:46'/> <source bridge='br0'/> <model type='virtio'/> </interface> I have one physical nic, one bridge (br0), one external ip address per guest. No NAT. BTW, I now notice that I have wrong MAC address (54:52), and you have it right (52:54), I probably got mine from "man virt-install" which contains an error: https://bugzilla.redhat.com/show_bug.cgi?id=620838 Anyway, my vguests work fine. - Jussi