[libvirt-users] Fake Network Interface

Hello, Is there a supported method for creating a fake network interface in a VM's configuration file? I was using the below construct, however it is no longer working for me in recent versions of libvirt (libvirt 1.0.2 with qemu-kvm 1.4.0). Is there a different, preferred method for creating a fake virtual interface on the guest which does not exist on the host? <interface type='network'> <mac address='aa:aa:aa:aa:aa:aa'/> <source network='fake'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> Thanks, Andrew