With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgkZoneEndpointTimeouts
Cisco Gatekeeper Zone Endpoint Timeouts
1.3.6.1.4.1.9.10.40.1.1.1.1.10
The number of times the cgkEpTimeToLive has expired for an endpoint in this zone.
Back to CISCO-GATEKEEPER-MIB MIB page.
IPHost Network monitor allows you to monitor cgkZoneEndpointTimeouts 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.