Troubleshooting Guide

Troubleshooting IPv6 VRRP
The following sections describe troubleshooting information for IPv6 Virtual Router Redundancy
Protocol (VRRP).
VRRP transitions
When a VRRP transition takes place with the backup taking over as the master, look for the
following message in the syslog on the new master, as well as the old master. This message
provides information to allow you to determine the cause of the transition.
IPv6 Vrrp State Transition Trap(Port/Vlan=200, Type=masterToInitialize,
Cause=shutdownReceived, VrId=20,VrIpAddr=fe80:0:0:0:0:0:0:200,
Addr=fe80:0:0:0:224:7fff:fe9d:1a03)
In this message, see the Type and Cause fields.
Note:
Although all of the possible causes and types are listed below, not all of the listed causes and
types appear in the trap/log message.
The following table describes the VRRP transition types.
Table 39: Transition type
Type value Type definition
1 None
2 Master to backup
3 Backup to master
4 Initialize to master
5 Master to initialize
6 Initialize to backup
7 Backup to initialize
8 Backup to backup master
9 Backup master to backup
The following table describes the VRRP transition causes.
Table 40: Transition cause
Cause value Cause definition
1 None
Table continues…
Troubleshooting IPv6 VRRP
January 2017 Troubleshooting 231
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