Unambiguous QinQ termination configuration example

As shown in Figure 22:

• Layer 2 Switch C supports only single VLAN-tagged packets.

• On Layer 2 Switch B, GigabitEthernet 2/1/2 is enabled with QinQ to adds an SVLAN tag 100 to the packets with CVLAN ID 11.

Configure unambiguous QinQ termination so that Host A can communicate with Host B.

In this example, Layer 2 Switch C uses the factory configuration.

1. Configure Host A and Host B:

   # On Host A, specify 1.1.1.1/24 and 1.1.1.11/24 as its IP address and gateway IP address, respectively. (Details not shown.)

   # On Host B, specify 1.1.2.1/24 and 1.1.2.11/24 as its IP address and gateway IP address, respectively. (Details not shown.)

2. Configure Layer 2 Switch A:

   # Create VLAN 11.

   <L2_SwitchA> system-view
   [L2_SwitchA] vlan 11
   

   # Assign GigabitEthernet 2/1/2 to VLAN 11.

   [L2_SwitchA-vlan11] port gigabitethernet 2/1/2
   [L2_SwitchA-vlan11] quit
   

   # Configure GigabitEthernet 2/1/1 as a trunk port, and assign the port to VLAN 11.

   [L2_SwitchA] interface gigabitethernet 2/1/1
   [L2_SwitchA-GigabitEthernet2/1/1] port link-type trunk
   [L2_SwitchA-GigabitEthernet2/1/1] port trunk permit vlan 11
   

3. Configure Layer 2 Switch B:

   # Configure GigabitEthernet 2/1/2 as a trunk port, and assign the port to VLAN 11 and VLAN 100.

   <L2_SwitchB> system-view
   [L2_SwitchB] interface gigabitethernet 2/1/2
   [L2_SwitchB-GigabitEthernet2/1/2] port link-type trunk
   [L2_SwitchB-GigabitEthernet2/1/2] port trunk permit vlan 11 100
   

   # Set the PVID of GigabitEthernet 2/1/2 to VLAN 100.

   [L2_SwitchB-GigabitEthernet2/1/2] port trunk pvid vlan 100
   

   # Enable QinQ on GigabitEthernet 2/1/2.

   [L2_SwitchB-GigabitEthernet2/1/2] qinq enable
   [L2_SwitchB-GigabitEthernet2/1/2] quit
   

   # Configure GigabitEthernet 2/1/1 as a trunk port, and assign the port to VLAN 100.

   [L2_SwitchB] interface gigabitethernet 2/1/1
   [L2_SwitchB-GigabitEthernet2/1/1] port link-type trunk
   [L2_SwitchB-GigabitEthernet2/1/1] port trunk permit vlan 100
   

4. Configure the router:

   # Create Ethernet subinterface GigabitEthernet 2/1/1.10, and assign an IP address to the subinterface.

   <Router> system-view
   [Router] interface gigabitethernet 2/1/1.10
   [Router-GigabitEthernet2/1/1.10] ip address 1.1.1.11 255.255.255.0
   

   # Enable QinQ termination on GigabitEthernet 2/1/1.10 to terminate the VLAN-tagged packets with the Layer 1 VLAN ID 100 and the Layer 2 VLAN ID 11.

   [Router-GigabitEthernet2/1/1.10] vlan-type dot1q vid 100 second-dot1q 11
   [Router-GigabitEthernet2/1/1.10] quit
   

   # Assign an IP address to GigabitEthernet 2/1/2.

   [Router] interface gigabitethernet 2/1/2
   [Router-GigabitEthernet2/1/2] ip address 1.1.2.11 255.255.255.0
   

# Verify that Host A and Host B can ping each other. (Details not shown.)