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AR500, AR510, and AR530 V200R007 CLI-based Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring transparent bridge, MAC table, link aggregation, VLANs, STP/RSTP/MSTP, and so on.The document provides the configuration procedures and configuration examples to illustrate the service configuration methods and application scenario.
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Configuring a Dot1q Termination Sub-interface to Implement Inter-VLAN Communication

Configuring a Dot1q Termination Sub-interface to Implement Inter-VLAN Communication

When a router connects to users located in different VLANs through a Layer 3 Ethernet interface, configure Dot1q termination sub-interfaces on this Layer 3 Ethernet interface to implement inter-VLAN communication.


When a router connects to users on different network segments across different VLANs, configure Dot1q termination and IP addresses for the sub-interfaces to implement Layer 3 connectivity.


To implement inter-VLAN communication, hosts in each VLAN must use the IP address of the corresponding sub-interface as the default gateway address.


  1. Run:


    The system view is displayed.

  2. Run:

    interface interface-type interface-number.subinterface-number

    The sub-interface view is displayed.

  3. Run:

    ip address ip-address { mask | mask-length } [ sub ]

    An IP address is assigned to the sub-interface.

  4. Run:

    dot1q termination vid pe-vid

    Dot1q termination is configured on the sub-interface.

    Each sub-interface can only terminate one VLAN.

    Sub-interfaces of different main interfaces can be associated with the same VLAN, but sub-interfaces of the same main interface cannot be associated with the same VLAN.

  5. Run:

    arp broadcast enable

    ARP broadcast is enabled on the sub-interface.

    When you enable or disable ARP broadcast on a sub-interface, the routing status on the sub-interface alternates between Down and Up. This may result in route flapping on the entire network, and affects normal operation of services.

Updated: 2019-05-25

Document ID: EDOC1000097279

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