These may be related:
https://bugzilla.redhat.com/show_bug.cgi?id=571991 " libvirt should not use the MAC address assigned to tap devices/vnet interfaces by the TAP/TUN driver."
https://www.redhat.com/archives/libvir-list/2010-July/msg00450.html "[libvirt] [PATCH] Set a stable & high MAC addr for guest TAP devices on host"
These may be related:
https:/ /bugzilla. redhat. com/show_ bug.cgi? id=571991 " libvirt should not use the MAC address assigned to tap devices/vnet interfaces by the TAP/TUN driver."
https:/ /www.redhat. com/archives/ libvir- list/2010- July/msg00450. html "[libvirt] [PATCH] Set a stable & high MAC addr for guest TAP devices on host"