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Configuration Guide - Reliability

S7700 and S9700 V200R011C10

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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Multiple Masters Coexist in a VRRP Group

Multiple Masters Coexist in a VRRP Group

Fault Description

Multiple masters exist in a VRRP group.

Procedure

  1. Ping masters to check network connectivity between masters.

    • If the ping operation fails, check whether the network connection is correct.

    • If the ping operation is successful and the TTL value of the ping packet is 255, go to step 2.

  2. Run the display vrrp protocol-information command in any view to check whether the VRRP version on each master is compatible with the mode in which VRRP Advertisement packets are sent.

    • If the version is incompatible with the mode, run the vrrp version { v2 | v3 } command in the system view to change the version.

    • If the version is compatible with the mode, go to step 3.

    NOTE:
    • A VRRPv2 group can only send and receive VRRPv2 Advertisement packets, and discards the 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 to v2-only, v3-only, or v2v3-both.

  3. Run the display vrrp virtual-router-id command in any view to check whether the masters use the same virtual IP address, interval at which VRRP Advertisement packets are sent, authentication mode, and authentication key.

    • If the configured virtual IP addresses are different, run the vrrp vrid virtual-router-id virtual-ip virtual-address command to set the same virtual IP address.

    • If the intervals are different, run the vrrp vrid virtual-router-id timer advertise advertise-interval command to set the same interval.

    • If the authentication modes and keys are different, run the vrrp vrid virtual-router-id authentication-mode { simple { key | plain key | cipher cipher-key } | md5 md5-key } command to set the same authentication mode and key.

      NOTE:

      To ensure security, you are advised to use MD5 as the authentication algorithm of VRRP.

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Updated: 2019-10-18

N. documento: EDOC1000178318

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