With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cGgsnExtTraceStatusReference
cisco Gateway GPRS Support Node Ext Trace Status Reference
1.3.6.1.4.1.9.9.647.1.3.7.1.4
This object represents the trace reference of the subscriber who is being traced currently on this gateway.
Back to CISCO-GGSN-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cGgsnExtTraceStatusReference 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.