> Also, if you assign MACs to your VMs at installation time (I do, for > DHCP- and DNS-related reasons), you should note that KVM MACs lives in > a different namespace: 54:52:00:xx:xx:xx. You can change the allocated MAC address by editing the files in /etc/libvirt/qemu . Edit the <mac address='54:52:00:19:f2:ef'/> section and you're all set. I am not sure if you need to restart libvirtd after making the changes, as I have not got a machine I can test that at the moment.