With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cggsnQosCurrentUsedBandwidth
Cisco Gateway GPRS Support Node Qos Current Used Bandwidth
1.3.6.1.4.1.9.9.241.1.2.2
The current amount of bandwidth resource used on the GGSN. This object can only be retrieved if cggsnQosMappingMethod is set to canonical(2).
Back to CISCO-GGSN-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor cggsnQosCurrentUsedBandwidth on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.