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S9300, S9300E, and S9300X V200R012C00 Configuration Guide - Ethernet Switching

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, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol transparent transmission.
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Configuring the Switch to Add Double VLAN Tags to Untagged Packets

Configuring the Switch to Add Double VLAN Tags to Untagged Packets


Generally, two switches are required to add double tags to packets. Configuring one switch to add double VLAN tags to untagged packets can simplify configuration. In addition, a Layer 2 interface can add double tags to untagged packets to differentiate services or users.

This configuration is not supported on the LE0MG24CA and LE0MG24SA cards.


  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    An outer VLAN is created.

  3. Run quit

    Return to the system view.

  4. Run interface interface-type interface-number

    The interface view is displayed.

  5. Run port link-type hybrid

    The link type of the interface is set to hybrid.

    By default, the link type of an interface is hybrid.

  6. Run port hybrid untagged vlan vlan-id

    The interface is added to the outer VLAN.

  7. Run port vlan-stacking untagged stack-vlan vlan-id1 stack-inner-vlan vlan-id2

    The interface is configured to add double VLAN tags to untagged packets.


    To enable an interface to add double VLAN tags to an untagged packet, you must set the link type of the interface to hybrid, and add the interface to the outer VLAN in untagged mode.

    If the PVID of the interface is not VLAN 1, restore the PVID to VLAN 1 before running the port vlan-stacking untagged command.

    The port vlan-stacking untagged command actually configures interface-based VLAN assignment. Different VLAN assignment modes are in the following order of priority: policy-based VLAN assignment > voice VLAN include-untagged > MAC address-based VLAN assignment > IP subnet-based VLAN assignment > protocol-based VLAN assignment > interface-based VLAN assignment.

Updated: 2019-01-18

Document ID: EDOC1100038290

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