PPPoE get disconnected

Hi,

I’ve implemented PPPoE + MPLS + VPLS + NV2 with Qos.
Priority informations are crossing all the network for Voip and Video with my rules but…
When a NV2 wireless link in the middle of the MPLS path get to saturation, voice is good but all pppoe-sessions of end-user drop down and does not reconnect until link is desaturated…

Do I need to and how can I set a priority for pppoe beacons ?
Thanks in advance.

Best regards,
Julien Hoppe
Witecom
http://www.witecom.com