| | 180 | |
| | 181 | * [https://www.redhat.com/archives/libvirt-users/2012-September/msg00038.html Re: [libvirt-users] virtual networking - virbr0-nic interface] |
| | 182 | > > Any pointers on how virbr0 and virbr0-nic work would be really helpful. |
| | 183 | > |
| | 184 | > It's a workaround for kernel bug/feature. The bridge's MAC is copied |
| | 185 | > from the first NIC attached. So if one detach all interfaces from a |
| | 186 | > bridge and then attach just one, the bridge will lost previous MAC and |
| | 187 | > gain a new one - just the same as the attached interface has. |
| | 188 | > |
| | 189 | > So if libvirt has to ensure a MAC for virtual bridge - it creates this |
| | 190 | > dummy device (no traffic is routed through though) and just attach it to |
| | 191 | > the virtual bridge. |
