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Configuration Guide - Ethernet Switching

S1720, S2700, S5700, and S6720 V200R012(C00 and C20)

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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Configuring 2-to-1 QinQ Mapping

Configuring 2-to-1 QinQ Mapping


2-to-1 QinQ mapping is configured on a sub-interface to map an outer VLAN tag in a received double-tagged packet to a specified VLAN tag and leave the inner VLAN tag intact.


  1. 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

    The system view is displayed.

  5. Run interface interface-type interface-number.subinterface-number

    The view of the CE-side Ethernet or Eth-Trunk sub-interface of the PE is displayed.

  6. Run qinq mapping pe-vid vlan-id1 ce-vid vlan-id2 [ to vlan-id3 ] map-vlan vid vlan-id4

    The sub-interface is configured to map the outer VLAN tag of double-tagged packets to a specified VLAN tag.

    The original outer VLAN ID of double-tagged packets specified in the command must be different from outer VLAN IDs specified on all the other sub-interfaces.

    • QinQ mapping cannot be used with stacking, QinQ termination, or Dot1q termination commands on the same sub-interface.

    • If the PW-side routing interface is a Layer 3 interface switched by the undo portswitch command, the AC-side interface cannot be a Layer 3 routing interface or its sub-interface belonging to a Layer 3 interface; otherwise, traffic fails to be forwarded. This rule applies to S5720EI, S6720EI, and S6720S-EI.

Updated: 2018-12-24

Document ID: EDOC1100038339

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