With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cGtpPathModifyBearerRsps
Cisco GPRS Tunneling Protocol Path Modify Bearer Rsps
1.3.6.1.4.1.9.9.734.1.1.2.3.1.5
This object represents the total number of Modify-Bearer response messages handled on a GTP path.
Back to CISCO-GTPV2-MIB MIB page.
IPHost Network monitor allows you to monitor cGtpPathModifyBearerRsps 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.