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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R011C10

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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Configuring Basic QinQ

Configuring Basic QinQ


Basic QinQ enables the device to add a public tag to incoming packets so that user packets can be forwarded on the public network. To separate private networks from public networks and conserve VLAN resources, configure double 802.1Q tags on QinQ interfaces of the device. Private VLAN tags are used on private networks such as enterprise networks, and public VLAN tags are used on external networks such as ISP networks. QinQ expands VLAN space to 4094x4094 and allows packets on different private networks with the same VLAN IDs to be transparently transmitted.


  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    A VLAN used on the public network is created.

  3. Run quit

    Exit from the VLAN view.

  4. Run interface interface-type interface-number

    The interface view is displayed.

    The interface can be a physical interface or an Eth-Trunk interface.

  5. Run port link-type dot1q-tunnel

    The link type of the interface is set to Dot1q-tunnel.

    By default, the link type of an interface is negotiation-desirable.

    Dot1q-tunnel interfaces do not support Layer 2 multicast.

  6. Run port default vlan vlan-id

    The VLAN ID of the public VLAN tag, that is, the default VLAN of the interface, is configured.

    By default, VLAN 1 is the default VLAN of all interfaces.

Verifying the Configuration

  • Run the display current-configuration interface interface-type interface-number command to check the QinQ configuration on the interface.
Updated: 2019-10-18

Document ID: EDOC1000178310

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