When backbone network edge devices receive untagged Layer 2 protocol data units (PDUs) from user networks, configure untagged Layer 2 protocol tunneling to allow the Layer 2 PDUs to be tunneled across the backbone network. Layer 2 PDUs from the user networks then travel through different Layer 2 tunnels to reach the destinations to perform Layer 2 protocol calculation. This example uses the Spanning Tree Protocol (STP).
When backbone network edge devices receive Layer 2 protocol data units (PDUs) that carry a single VLAN tag from user networks, configure VLAN-based Layer 2 protocol tunneling to allow the Layer 2 PDUs to be tunneled across the backbone network. Layer 2 PDUs from the user networks then travel through different Layer 2 tunnels to reach the destinations to perform Layer 2 protocol calculation. This example uses the Spanning Tree Protocol (STP).
When backbone network edge devices receive tagged Layer 2 protocol data units (PDUs) from user networks, configure QinQ-based Layer 2 protocol tunneling to allow the Layer 2 PDUs to be tunneled across the backbone network and also reduce the consumption of VLAN resources on the backbone network. Layer 2 PDUs from the user networks then travel through different Layer 2 tunnels to reach the destinations to perform Layer 2 protocol calculation. This example uses the Spanning Tree Protocol (STP).
CE1 and CE2 are non-Huawei devices. Both CEs support the Cisco Discovery Protocol (CDP). To ensure that these CEs can work with NetEngine 8000 Fs, you must establish a VPWS PW between PE1 and PE2. In this manner, CE1 and CE2 can transparently transmit CDP packets between each other over the PW and use CDP to discover each other.
CE1 and CE2 are non-Huawei devices. Both CEs support the Cisco Discovery Protocol (CDP). To ensure that these CEs can work with NetEngine 8000 Fs, you must establish a VPLS PW between PE1 and PE2. In this manner, CE1 and CE2 can transparently transmit CDP packets between each other over the PW and use CDP to discover each other.