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CLI-based Configuration Guide - Reliability

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document provides guidance for configuring reliability services, including interface backup, BFD, VRRP, and EFM.
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Configuring an Interface Monitoring Group

Configuring an Interface Monitoring Group


In a dual-system backup scenario, an interface monitoring group can be configured to associate the network-side interface status with the access-side interface status in order to trigger a master/backup switchover of access-side links.


  1. Run system-view

    The system view is displayed.

  2. Run monitor-group monitor-group-name

    An interface monitoring group is created and the view of the interface monitoring group is displayed.


    The undo monitor-group command deletes all configurations of an interface monitoring group. If an interface monitoring group has track interfaces, the interface monitoring group cannot be deleted.

  3. (Optional) Run trigger-up-delay trigger-up-delay-value

    A delay for a track interface of the interface monitoring group to restore the Up state is set.

    By default, a track interface becomes Up immediately after the corresponding binding interface becomes Up.

  4. Run monitor enable

    Enable an interface monitoring group.

  5. Run binding interface interface-type interface-number [ down-weight down-weight-value ]

    A network-side interface is added to the interface monitoring group.


    An Eth-Trunk cannot be added to an interface monitoring group together with any member interfaces.

    Performing Step 5 in duplicate can add multiple network-side interfaces to an interface monitoring group. An interface monitoring group has a maximum of 32 binding interfaces.

  6. Run quit

    Return to the system view.

  7. Run interface interface-type interface-number

    The view of the specified access-side interface is displayed.

  8. Run track monitor-group monitor-group-name [ trigger-down-weight trigger-down-weight-value ]

    An access-side interface is configured to track the interface monitoring group.

    By default, an access-side interface does not track any interface monitoring group.

    If a track interface is an Eth-Trunk interface, the Eth-Trunk interface and its member interfaces cannot be associated with the same interface monitoring group.

    Status changes of binding interfaces trigger the status of corresponding track interface to change.


    The trigger-down-weight of a track interface must be smaller than the sum of the down-weight values of all binding interfaces in an interface monitoring group.

  9. Run quit

    Return to the system view.

    Perform Steps 7 to 8 in duplicate to configure multiple track interfaces to track an interface monitoring group. An interface monitoring group can be tracked by a maximum of 256 track interfaces. A track interface, however, can track only one interface monitoring group.

Checking the Configuration

  • Run the display monitor-group [ monitor-group-name ] command to check information about interface monitoring groups.

Updated: 2019-08-12

Document ID: EDOC1100034076

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