VRRP advertisement messages contain an IP address count field that indicates the number of IP addresses listed in the sequential IP address fields at the end of the message.
The Nokia routers implementation always logs mismatching events. The decision on where and whether to forward the generated messages depends on the configuration of the event manager.
To facilitate the sending of mismatch log messages, each virtual router instance keeps the mismatch state associated with each source IP address in the VRRP master table. Whenever the state changes, a mismatch log message is generated indicating the source IP address within the message, the mismatch or match event, and the time of the event.
With secondary IP address support, multiple IP addresses can be in the list and each should match the IP address on the virtual router instance. Owner and non-owner virtual router instances have the supported IP addresses explicitly defined, making mismatched supported IP addresses within the interconnected virtual router instances a provisioning issue.