[CentOS-virt] Vlan trunk/QinQ connected to KVM guest

[Nataraj]

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.

Thanks,
Nataraj