A、EPTL B、EPL C、EVPL
A、Data/Ethernet B、Data/Etnernet/GFP/SDH C、Data/Ethernet/MPLS/Ethernet D、Data/Ethernet/MPLS/SDH
A、Auto自動(dòng) B、Manual手動(dòng) C、Signal based基于信令 D、Cross connectionbased基于交叉連接