Configuring QinQ-based Layer 2 Protocol Tunneling

When each interface of a backbone device is connected to multiple user networks and Layer 2 protocol packets sent from user networks contain VLAN tags, configure QinQ-based Layer 2 protocol tunneling. This configuration allows Layer 2 protocol packets to be transparently transmitted on the backbone network and reduces VLAN IDs that the carrier uses.

Pre-configuration Tasks

Before configuring QinQ-based Layer 2 protocol tunneling, complete the following task:

Set link layer protocol parameters and IP addresses for interfaces to ensure that the link layer protocol on the interfaces is Up.
Use the bpdu enable command to enable the interfaces to send BPDUs to the CPU.

(Optional) Defining Characteristic Information About a Layer 2 Protocol

Configuring Layer 2 Protocol Tunneling Mode

Enabling QinQ-based Layer 2 Transparent Transmission on an Interface

Verifying the Configuration of Layer 2 Protocol Tunneling