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Configuration Guide - Reliability

S1720, S2700, S5700, and S6720 V200R010C00

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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(Optional) Configuring the VRRP Version Number

(Optional) Configuring the VRRP Version Number


IPv4 VRRP supports VRRPv2 and VRRPv3. If devices in a VRRP group use different VRRP versions, VRRP Advertisement packets will fail to be forwarded.
  • A VRRPv2 group can send and receive only VRRPv2 Advertisement packets, and discards received VRRPv3 Advertisement packets.
  • A VRRPv3 group can send and receive both VRRPv2 and VRRPv3 Advertisement packets. You can configure the mode in which VRRPv3 Advertisement packets are sent as v2-only, v3-only, or v2v3-both.


  1. Run:


    The system view is displayed.

  2. Run:

    vrrp version { v2 | v3 }

    The VRRP version number is set.

    By default, VRRPv2 is used.

    If VRRPv3 is used, run the vrrp version-3 send-packet-mode { v2-only | v3-only | v2v3-both } command to set the mode in which VRRPv3 Advertisement packets are sent. The default mode is v3-only.

Updated: 2019-08-21

Document ID: EDOC1000141941

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