With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgkLZoneStatsTimeoutSentUnregistrationRequests
Cisco Gatekeeper L Zone Stats Timeout Sent Unregistration Requests
1.3.6.1.4.1.9.10.40.1.1.4.4.1.3
The number of forced Unregistration Requests sent for the local zone due to Timeout.
Back to CISCO-GATEKEEPER-MIB MIB page.
IPHost Network monitor allows you to monitor cgkLZoneStatsTimeoutSentUnregistrationRequests on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.