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S12700 V200R013C00 Configuration Guide - Reliability

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, NSR Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, MAC Swap Loopback Configuration, EFM Configuration, CFM Configuration, Y.1731 Configuration.
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(Optional) Enabling the Backup Device in a VRRP Group to Forward Traffic

(Optional) Enabling the Backup Device in a VRRP Group to Forward Traffic


On large aggregation networks of enterprises, terminal users use active and standby links to access aggregation devices that have a VRRP group deployed. The aggregation device connects to the active link is the master device, and that connects to the standby link is the backup device. If the active link or the master device fails, a link switchover occurs. However, the master/backup switchover in the VRRP group has not yet completed. Therefore, a traffic interruption occurs and lasts for a short period.

To prevent traffic interruptions in such scenarios, enable the backup device in a VRRP group to forward traffic. This configuration ensures carrier-class reliability.

Figure 3-12  Configuring the backup device in a VRRP group to forward traffic


  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number.subinterface-number

    The view of the sub-interface on which a VRRP group is configured is displayed.

  3. Run vrrp vrid virtual-router-id backup-forward

    The backup device in the VRRP group is enabled to forward traffic.

    By default, the backup device in a VRRP group is disabled from forwarding traffic.

Updated: 2019-04-08

Document ID: EDOC1100065654

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