With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cGgsnExtTraceBufferLimit
cisco Gateway GPRS Support Node Ext Trace Buffer Limit
1.3.6.1.4.1.9.9.647.1.2.12
This object defines buffer limit when tracing is active for a subscriber.
Back to CISCO-GGSN-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cGgsnExtTraceBufferLimit on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.