With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
redundantApsIpAddress
redundant Aps Ip Address
1.3.6.1.4.1.351.110.1.1.20
the IP address of the redundant APS
Back to BASIS-SHELF-MIB MIB page.
IPHost Network monitor allows you to monitor redundantApsIpAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.