Hello, at http://libvirt.org/formatdomain.html#elementsNICS there are three examples of interfaces with a particular MAC address specified. I understand the provided mac address is more a placeholder than a real value; but since '11:22:33:44:55:66' seems to be a multicast address[1], I would suggest providing '00:11:22:33:44:55' as example. Best regards [1] http://en.wikipedia.org/wiki/MAC_address#Address_details -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list