With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cGgsnExtTraceActSesActivations
cisco Gateway GPRS Support Node Ext Trace Act Ses Activations
1.3.6.1.4.1.9.9.647.1.1.21.5
This object represents the total number of traces initiated for existing sessions.
Back to CISCO-GGSN-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cGgsnExtTraceActSesActivations 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.