H3C Technologies H3C S6800 Series Switches - Manual (Page 53)

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Troubleshooting VRRP
An error prompt is displayed
Symptom
An error prompt "The virtual router detected a VRRP configuration error." is displayed during
configuration.
Analysis
This symptom is probably caused by the following reasons:
• The VRRP advertisement interval in the packet is not the same as that for the current VRRP group.
• The number of virtual IP addresses in the packet is not the same as that for the current VRRP group.
• The virtual IP address list is not the same as that for the current VRRP group.
• A device in the VRRP group receives illegitimate VRRP packets. For example, the IP address owner
receives a VRRP packet with the priority 255.
Solution
• Modify the configuration on routers in VRRP groups to ensure consistent configuration.
• Take fault location and anti-attack measures to eliminate potential threats.
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.