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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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QinQ Traffic Forwarding Fails Because the Interface Does Not Transparently Transmit the Outer VLAN ID

QinQ Traffic Forwarding Fails Because the Interface Does Not Transparently Transmit the Outer VLAN ID

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 configured with selective QinQ to check the outer VLAN tag.
  2. Run the display vlan vlan-id command in any view to check whether the interface configured with selective QinQ belongs to the outer VLAN. vlan-id specifies the outer VLAN ID.
    <HUAWEI> display vlan 3
    --------------------------------------------------------------------------------
    U: Up;         D: Down;         TG: Tagged;         UT: Untagged;               
    MP: Vlan-mapping;               ST: Vlan-stacking;                              
    #: ProtocolTransparent-vlan;    *: Management-vlan;                             
    --------------------------------------------------------------------------------
                                                                                    
    VID  Type    Ports                                                              
    --------------------------------------------------------------------------------
    3    common  UT:GE1/0/2(U)                                                      
                                                                                    
    VID  Status  Property      MAC-LRN Statistics Description                       
    --------------------------------------------------------------------------------
    3    enable  default       enable  disable    VLAN 0003 
    • If the system displays the message "Error:The VLAN does not exist.", the outer VLAN is not created. Run the vlan batch command to create the outer VLAN and run the display vlan vlan-id command to check whether the interface belongs to the VLAN.
    • If there is no interface configured with selective QinQ, run the port hybrid untagged vlan vlan-id command to add the interface to the VLAN in untagged mode.
    • If the command output does not display the interface configured with selective QinQ but the flag before the interface is not UT, run the port hybrid untagged vlan vlan-id command to add the interface to the VLAN in untagged mode.
    • If the command output displays the interface configured with selective QinQ and the interface has joined the VLAN in untagged mode, continue to check for other common misconfigurations.
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Updated: 2019-08-21

Document ID: EDOC1000142081

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