3Com 10014299 manual Many master routers exist within the same standby group

660CHAPTER 46: CONFIGURING VRRP

The console frequently displays messages about configuration mistakes.

This shows that a mistaken VRRP packet has been received. One reason may be inconsistent configuration of another router within the standby group. Another reason may be the attempt of some devices to send out illegal VRRP packets.

The first possibility can be solved through modifying the configuration. The second possibility is caused by the malicious attempt of some devices so non-technical measures should be attempted.

Many master routers exist within the same standby group.

There are also 2 reasons. One is short coexistence of many master routers, which is normal and needs no manual intervention. Another is the long coexistence of many master routers, which may be caused by failure to receive VRRP packets between master routers, or the reception of illegal packets.

To solve these problems, try to ping the many master routers. If that fails, it indicates faults in the links between routers and it is necessary to check the links. If they can be pinged through, it indicates that the problems may be caused by an inconsistent configuration. For the configuration of the same VRRP standby group, complete consistence for the number of virtual IP addresses, each virtual IP address, timer interval and authentication method must be guaranteed.

There is requent switchover of the VRRP state.

Such problems are generally caused by standby group timer intervals that are too short. To solve this problem, extend this interval or configure the preemption delay.