| 摘要 |
A method and Provider Edge Bridge (91, 131) for providing a Virtual C-tagged User Network Interface, VUNI, service interface or a Hairpin Switching service interface, in one embodiment, the Provider Edge Bridge (91) includes a Customer VLAN, C-VLAN, component (94); a first S-VLAN component (95) connected to the C-VLAN component and to a Metro Ethernet Network, MEN (92); and a second S-VLAN component (96) connected to the C-VLAN component (94), to the first S-VLAN component (95), and to an External Network Network Interface, E-NNI (93). in another embodiment, the Provider Edge Bridge (131) includes the C-VLAN component (94) and a single S-VLAN component (132) connected to the C- VLAN component (94), to the MEN (92), and to the E-NNI (93). In both embodiments, the Provider Edge Bridge is configured to provide the VUNI service interface or the Hairpin Switching service interface without utilizing a S-VLAN mapping component. |
