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S12700 V200R010C00 Configuration Guide - Reliability

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.
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Configuring Association Between VRRP and Routing to Monitor the Uplink Status

Configuring Association Between VRRP and Routing to Monitor the Uplink Status


Because VRRP cannot detect faults on the uplink of a VRRP group, services may be interrupted. The VRRP group monitors the number of routes on the uplink forwarding path. When the route is withdrawn or becomes inactive, the master's priority is adjusted and an active/standby switchover is performed. This reduces the effect of a link fault on service forwarding.

When the fault is rectified, the original master restores its priority to become the master again and begins forwarding traffic.

During route association, the link switchover depends on convergence of a routing protocol associated with the VRRP group.

  • When a VRRP group is associated with a static route, the device can detect only faults on the direct uplink.

  • The master and backup in the VRRP group must work in preemption mode. It is recommended that the preemption delay be 0 on the backup and nonzero on the master.


  1. Run:


    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The view of the interface on the master where a VRRP group is configured is displayed.

  3. (Optional) On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

  4. Run:

    vrrp vrid virtual-router-id track ip route ip-address { mask-address | mask-length } [ vpn-instance vpn-instance-name ] [ reduced value-reduced ]

    Association between a route and a VRRP group is configured.

    By default, the master's priority decreases by 10 if the associated route is withdrawn or becomes inactive.

    When setting the value by which the priority decreases, ensure that the priority of the backup is higher than the priority of the master.

Updated: 2019-08-21

Document ID: EDOC1000142090

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