7210 SAS-D and 7210 SAS-Dxp devices support QinQ SAPs or Dot1q SAPs that allows them to connect to upstream PE nodes providing IP/MPLS transport.
VPLS is provided over QinQ/Dot1q SAPs by:
Connecting bridging-capable 7210 SAS devices.
Replicating unknown and broadcast traffic in a service domain.
Enabling MAC learning over QinQ/Dot1q SAPs and access ports (see VPLS MAC learning and packet forwarding).
Using a separate forwarding information base (FIB) per VPLS service.