H3C Technologies H3C MSR 5600 - Manual (Page 56)

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Multiple masters appear in a VRRP group
Symptom
Multiple masters appear in a VRRP group.
Analysis
It is normal for a VRRP group to have multiple masters for a short time, and this situation requires no
manual intervention.
If multiple masters coexist for a longer period, it might be because the masters cannot receive
advertisements from each other, or because the received advertisements are illegitimate.
Solution
Ping between these masters, and do the following checks:
• If the ping fails, examine network connectivity.
• If the ping succeeds, check for configuration inconsistencies in the number of virtual IP addresses,
virtual IP addresses, and authentication. For IPv4 VRRP, also make sure a consistent version of VRRP
is configured on all routers in the VRRP group. For VRRPv2, make sure consistent VRRP
advertisement interval is configured on the routers in the VRRP group.
Fast VRRP state flapping
Symptom
Fast VRRP state flapping occurs.
Analysis
The VRRP advertisement interval is set too short.
Solution
Increase the interval for sending VRRP advertisements or introduce a preemption delay.