With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgkLocalZoneStatsLocationTable
Cisco Gatekeeper Local Zone Stats Location Table
1.3.6.1.4.1.9.10.40.1.1.4.2
This table contains the information about Location statistics data for a local zone managed by this Gatekeeper. If cgkZoneLocalZone is 'false' for a particular zone, there will be no entry in this table for that cgkZoneIndex.
Back to CISCO-GATEKEEPER-MIB MIB page.
IPHost Network monitor allows you to monitor cgkLocalZoneStatsLocationTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.