Configuring a VLAN Tag Termination Sub-interface

A VLAN tag termination sub-interface can be a dot1q VLAN tag termination sub-interface or a QinQ VLAN tag termination sub-interface. In dot1q/QinQ termination, a device identifies whether a packet has one tag or two tags. The device then forwards the packet after stripping one or both tags or discards the packet.

Procedure

Configure a dot1q VLAN tag termination sub-interface.
1. Run system-view
  
  The system view is displayed.
2. Run interface interface-type interface-number.subinterface-number
  
  The view of an Ethernet sub-interface on the user side of a PE is displayed
3. (Optional) Create a user VLAN group.
  1. Run vlan-group group-id
    
    A user VLAN group is created.
  2. Run group mode { single | multiple }
    
    The working mode of the VLAN group is configured.
    - single: A VLAN group is considered as a user. This means that you cannot collect statistics about QinQ packets or deploy quality of service (QoS) policies based on a VLAN or a VLAN range.
    - multiple: VLANs and VLAN ranges in a VLAN group are considered as different users. This means that you can collect statistics about QinQ packets or deploy QoS policies based on a VLAN or VLAN range to implement refined management.
  3. Run quit
    
    Return to the view of the Ethernet sub-interface on the user side of the PE.
  Configuring a VLAN group allows you to achieve the following purposes:
  - Deploy QoS policies based on services or users so that higher priority service traffic is preferentially forwarded, improving user experience.
  - View statistics about QinQ packets to check whether a device is functioning properly.
4. Run control-vid vid dot1q-termination [ rt-protocol ] or encapsulation dot1q-termination [ rt-protocol ]
  
  The encapsulation type for a VLAN tag termination sub-interface is configured to be dot1q.
  
  Specify rt-protocol so that the dot1q VLAN tag termination sub-interface supports routing protocols.
5. Run dot1q termination vid low-pe-vid [ to high-pe-vid ] [ vlan-group group-id ]
  
  The VLAN tag termination function is configured for the dot1q VLAN tag termination sub-interface.
  
  After you specify rt-protocol, the dot1q VLAN tag termination sub-interface terminates packets carrying a fixed-value VLAN tag.
6. Run commit
  
  The configuration is committed.
Configure a QinQ VLAN tag termination sub-interface.
1. Run system-view
  
  The system view is displayed.
2. Run interface interface-type interface-number.subinterface-number
  
  The view of an Ethernet sub-interface on the user side of a PE is displayed
3. (Optional) Create a user VLAN group.
  1. Run vlan-group group-id
    
    A user VLAN group is created.
  2. Run group mode { single | multiple }
    
    The working mode of the VLAN group is configured.
    - single: A VLAN group is considered as a user. This means that you cannot collect statistics about QinQ packets or deploy quality of service (QoS) policies based on a VLAN or a VLAN range.
    - multiple: VLANs and VLAN ranges in a VLAN group are considered as different users. This means that you can collect statistics about QinQ packets or deploy QoS policies based on a VLAN or VLAN range to implement refined management.
  3. Run quit
    
    Return to the view of the Ethernet sub-interface on the user side of the PE.
  Configuring a VLAN group allows you to achieve the following purposes:
  - Deploy QoS policies based on services or users so that higher priority service traffic is preferentially forwarded, improving user experience.
  - View statistics about QinQ packets to check whether a device is functioning properly.
4. Run control-vid vid qinq-termination [ local-switch | rt-protocol ] or encapsulation qinq-termination [ local-switch | rt-protocol ]
  
  The encapsulation type for a VLAN tag termination sub-interface is configured to be QinQ.
  - Specify local-switch so that the QinQ VLAN tag termination sub-interface supports local switching.
  - Specify rt-protocol so that the QinQ VLAN tag termination sub-interface supports routing protocols.
5. Run qinq termination pe-vid pe-vid [ to high-pe-vid ] ce-vid ce-vid [ to high-ce-vid ] [ vlan-group group-id ]
  
  The VLAN tag termination function is configured for the QinQ VLAN tag termination sub-interface.
  
  After you specify rt-protocol, the QinQ VLAN tag termination sub-interface terminates packets carrying two fixed-value VLAN tags.
6. Run commit
  
  The configuration is committed.