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