Transparent VLAN Tagging with libvirt and Open vSwitch

As of version 0.10.0 of libvirt, transparent VLAN tagging is fully supported with Open vSwitch (OVS). This feature allow to transparently forward tagged VM traffic to the ethernet network, providing functionality similar to a switch's VLAN trunk. Transparent VLAN tagging is particularly interesting if you want to directly and easily terminates VLANs on your virtual machines (say virtual routers or gateways), while keeping your host configuration as simple as possible, and so without messing up with tens or even hundreds of bridges.

Read More