With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cRFHistoryPrevActiveUnitId
Cisco RF History Prev Active Unit Id
1.3.6.1.4.1.9.9.176.1.3.2.1.2
Indicates the primary redundant unit that went down.
Back to CISCO-RF-MIB MIB page.
IPHost Network monitor allows you to monitor cRFHistoryPrevActiveUnitId on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.
