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AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S V200R009 CLI-based Configuration Guide - Ethernet Switching

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Configuring a QinQ VLAN Tag Termination Sub-interface

Configuring a QinQ VLAN Tag Termination Sub-interface

Context

A QinQ VLAN tag termination sub-interface can terminate double-tagged user packets.

A QinQ VLAN tag termination sub-interface connects to an L2VPN in symmetrical or asymmetrical mode. User packets are transmitted over an L2VPN in different modes. PEs process these packets in the ways described in the following tables.
Table 8-3  Packet processing on the inbound interface

Mode

VLL/PWE3

Ethernet Encapsulation

VLAN Encapsulation

Symmetrical

Strips the outer tag.

Reserves the double tags, and takes no action.

Asymmetrical

Strips the double tags.

Strips two tags and adds one tag.

Table 8-4  Packet processing on the outbound interface

Mode

VLL/PWE3

Ethernet Encapsulation

VLAN Encapsulation

Symmetrical

Adds the outer tag.

Replaces the outer tag.

Asymmetrical

Adds double tags.

Strips one tag and adds double tags.

Perform the following operations on a user-side interface of a PE.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface { ethernet | gigabitethernet } interface-number.subinterface-number

    The Ethernet sub-interface view is displayed.

  3. Run qinq termination l2 { symmetry | asymmetry }

    A mode of the QinQ VLAN tag termination sub-interface is configured.

    By default, a QinQ termination sub-interface uses the asymmetrical mode.

  4. Run qinq termination pe-vid pe-vid ce-vid ce-vid1 [ to ce-vid2 ]

    The sub-interface is configured to terminate double-tagged packets.

    NOTE:
    • high-pe-vid is supported by only the AR3200-S.

    • You can specify high-pe-vid only after the termination-vid batch enable command is used to enable a sub-interface to batch terminate VLAN tags.

    • The value of high-pe-vid must be greater than or equal to the value of low-pe-vid.

    • When this command is executed on an Eth-Trunk sub-interface, you cannot specify high-pe-vid.

    • After a VLAN tag termination sub-interface is configured, ensure that ARP broadcast is enabled on the sub-interface. For details, see the arp broadcast enable command.

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Updated: 2019-05-17

Document ID: EDOC1000174108

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