H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 39)

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Auth Type : None
Virtual IP : 202.38.160.200
Virtual MAC : 0000-5e00-0102
Master IP : 202.38.160.131
The output shows that in VRRP group 1 AC 1 is the master, AC 2 is the backup and the hosts with
the default gateway of 202.38.160.100/25 access the Internet through AC 1. In VRRP group 2
AC 1 is the backup, AC 2 is the master and the hosts with the default gateway of
202.38.160.200/25 access the Internet through AC 2.
Troubleshooting VRRP
Symptom 1:
The screen frequently displays error prompts.
Analysis:
This error is probably caused by:
• Inconsistent configuration of the devices in the VRRP group.
• A device is attempting to send illegitimate VRRP packets.
Solution:
• In the first case, modify the configuration.
• In the latter case, resort to non-technical measures.
Symptom 2:
Multiple masters are present in the same VRRP group.
Analysis:
• Multiple masters coexist for a short period: This is normal and requires no manual intervention.
• Multiple masters coexist for a long period: This is because devices in the VRRP group cannot receive
VRRP packets, or the received VRRP packets are illegal.
Solution:
Ping between these masters, and do the following:
• If the ping fails, check network connectivity.
• If the ping succeeds, check that their configurations are consistent in terms of number of virtual IP
addresses, virtual IP addresses, advertisement interval, and authentication.
Symptom 3:
Frequent VRRP state transition.
Analysis:
The VRRP advertisement interval is set too short.
Solution:
Increase the interval to sent VRRP advertisement or introduce a preemption delay.