QinQ Traffic Forwarding Fails Because the Outer VLAN Is Not Created

Fault Symptom

After selective QinQ is configured on an interface, traffic forwarding fails.

Procedure

1. Run the display this command in the view of the interface with selective QinQ configured to check the outer VLAN ID.
2. Run the display vlan summary command in any view to check whether the outer VLAN has been created.

   <HUAWEI> display vlan summary
   Static vlan:                                                                    
   Total 3 static vlan.                                                            
     1 9 to 10                                                                     
                                                                                   
   Dynamic vlan:                                                                     
   Total 0 dynamic vlan.                                                           
                                                                                   
   Reserved vlan:
   Total 0 reserved vlan.

   • If the command output contains the outer VLAN ID, the outer VLAN has been created. Continue to check for other common misconfigurations.
   • If the command output does not contain the outer VLAN ID, the outer VLAN is not created. Run the vlan batch command to create the outer VLAN and check whether QinQ traffic can be correctly transmitted. If traffic forwarding still fails, continue to check for other common misconfigurations.