With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cagwCurrentFlows
Cisco's ASN Gateway Current Flows
1.3.6.1.4.1.9.9.638.1.2.1.1.8
The current number of flows for all sessions active on this ASN-GW.
Back to CISCO-ASN-GATEWAY-MIB MIB page.
IPHost Network monitor allows you to monitor cagwCurrentFlows 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.