VPLS services are designed to carry Ethernet frame payloads, so the services can provide connectivity between any SAPs and SDPs that pass Ethernet frames. The following SAP encapsulations are supported on the 7450 ESS, 7750 SR, and 7950 XRS VPLS services:
Ethernet null
Ethernet dot1q
Ethernet QinQ
SONET/SDH BCP-null
SONET/SDH BCP-dot1q
ATM VC with RFC 2684 Ethernet bridged encapsulation (See ATM/Frame Relay PVC Access and Termination on a VPLS Service).
FR VC with RFC 2427 Ethernet bridged encapsulation (See ATM/Frame Relay PVC Access and Termination on a VPLS Service).