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CLI-based Configuration Guide - Ethernet Switching

AR650, AR1600, and AR6100 V300R003

This document describes how to configure the components for LAN services, including link aggregation groups, VLANs, voice VLANs, MAC address tables, transparent bridging, as well as GVRP, STP/RSTP, and MSTP protocols.
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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 system-view

    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 low-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: 2019-04-12

Document ID: EDOC1100041791

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