Configuring a QinQ Termination Sub-interface and Connecting It to an L3VPN
When users are connected through an L3VPN and the packets that CEs send to PEs carry double VLAN tags, configure a QinQ termination sub-interface and connect it to the L3VPN.
Pre-configuration Tasks
Before configuring a QinQ termination sub-interface and connecting it to an L3VPN, complete the following tasks:
Ensure that devices are connected correctly.
Configure VLANs to which CEs belong and basic Layer 2 forwarding so that packets sent from CEs to PEs carry double VLAN tags.