Configuring a QinQ Sub-interface

When a VPN network connects to an ISP network through a sub-interface, the sub-interface needs to terminate VLAN tags. When data packets sent by CEs to PEs carry double VLAN tags, the sub-interface terminates double VLAN tags. This sub-interface is called QinQ termination sub-interface.

Procedure

• Configure an IPv4 address for a sub-interface.
  1. On the PE device, run:

     system-view

     The system view is displayed.

  2. Run:

     interface interface-type interface-number

     The interface view is displayed.

  3. Run:

     port link-type { hybrid | trunk }

     The port link-type is set.

  4. Run:

     quit

     Return to the system view.

  5. Run:

     interface interface-type interface-number.subinterface-number

     The view of the sub-interface connecting the PE to the CE is displayed.

  6. Run:

     ip address ip-address { mask | mask-length }

     An IPV4 address is configured for the sub-interface.

  7. Run:

     qinq termination pe-vid pe-vid ce-vid ce-vid1 [ to ce-vid2 ]

     QinQ termination is configured on the sub-interface.

     After a VLANIF interface is configured, the corresponding VLAN cannot be configured as an outer VLAN for the sub-interface for QinQ VLAN tag termination.

  8. Run:

     arp broadcast enable

     The sub-interface is enabled to forward ARP broadcast packets.

• Configure an IPv6 address for a sub-interface.
  1. On the PE device, run:

     system-view

     The system view is displayed.

  2. Run:

     ipv6

     IPv6 packet forwarding is enabled.

  3. Run:

     interface interface-type interface-number

     The interface view is displayed.

  4. Run:

     port link-type { hybrid | trunk }

     The port link-type is set.

  5. Run:

     quit

     Return to the system view.

  6. Run:

     interface interface-type interface-number.subinterface-number

     The view of the sub-interface connecting the PE to the CE is displayed.

  7. Run:

     ipv6 enable

     The IPv6 function is enabled on the interface.

  8. Run:

     ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length }

     An IPV6 address is configured for the sub-interface.

  9. Run:

     qinq termination pe-vid pe-vid ce-vid ce-vid1 [ to ce-vid2 ]

     QinQ termination is configured on the sub-interface.

     After a VLANIF interface is configured, the corresponding VLAN cannot be configured as an outer VLAN for the sub-interface for QinQ VLAN tag termination.

  10. Run:

      ipv6 nd ns multicast-enable

      The sub-interface is enabled to sending NS multicast packets.