The solution is, to delete /etc/udev/rules.d/70-persistent-net.rules in the guest and reboot. This is an autogenerated file, which stores the mapping of MAC adresses to interface names. Since my MAC address changed, the interface wasn't automatically added anymore. found at: http://vmfaq.com/entry/24/ Thomas Koch, http://www.koch.ro -- Libvir-list mailing list Libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list