You can configure customer edges (CEs) as customers and provider edges (PEs) as providers and configure interface-based bridge protocol data unit (BPDU) tunneling on the CEs and PEs.
You can configure both customer edges (CEs) and provider edges (PEs) as customers and configure interface-based bridge protocol data unit (BPDU) tunneling on the CEs and PEs.
In this example, provider edges (PEs) function as aggregation devices. An interface on a PE may receive bridge protocol data units (BPDUs) from different user networks, and the customer edges (CEs) add different virtual local area network (VLAN) IDs to the BPDUs to differentiate the user networks. To transparently transmit the BPDUs over the carrier network, you can deploy VLAN-based BPDU tunneling on the PEs and CEs.
In this example, provider edges (PEs) function as aggregation devices. When the PEs are connected to a large number of user networks, you can configure 802.1Q in 802.1Q (QinQ)-based bridge protocol data unit (BPDU) tunneling. QinQ-based BPDU tunneling enables the customer edges (CEs) to allocate different virtual local area network (VLAN) tags to BPDUs and enables the PEs to allocate different outer VLAN tags to the BPDUs based on the CE VLAN IDs. QinQ-based BPDU tunneling differentiates BPDUs from different user networks and saves VLAN ID resources for the carrier network.