I am running KVM guests under Redhat 6. I tried to setup a bridge
device to an interface with a vlan trunk connected to a Juniper switch.
On the KVM host, I am able to define vlans and access them via the vlan
trunk. I was not able to access a vlan from the kvm guest connected to
the bridged interface. I believe this would be what is commonly called
QinQ or 802.1ad. Is this possible to do? I am using virtio drivers.
If I can't do this, I guess I will end up with alot of bridged vlans. I
tried doing this a while back under the vmware server and it did not
work either. I think the reason that it did not work had something to
do with arp resolution. I believe I read some where that it may be
possible under ESXi.
Grokbase › Groups › CentOS › centos-virt › March 2011