With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
vrrpOperIpAddrCount
vrrp Operation Ip Address Count
1.3.6.1.2.1.68.1.3.1.6
The number of IP addresses that are associated with this virtual router. This number is equal to the number of rows in the vrrpAssoIpAddrTable that correspond to a given IF index/VRID pair.
Back to ibm-vrrp MIB page.
IPHost Network monitor allows you to monitor vrrpOperIpAddrCount on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM Flex systems right now.