I have configure a MPLS/VPLS Connection over NV2 with frame-priority an 4 Queues.
At the first side i use firewall for pppoe on bridge and with a simple mangle rule i set Voip-traffic from SIP-Server to prio=7 and all other traffic to prio=2 (all on src in filter rule).
On the second side also (destination).
All works fine, but VPN is not going over the link.
The filter sets the MPLS EX-Bit to 7 or 2.
Ros is 5.6 and 5.8