With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cGtpUnsupportedExtHdr
Cisco GPRS Tunneling Protocol Unsupported Ext Hdr
1.3.6.1.4.1.9.9.188.1.3.4.1.12
This object represents the number of create PDP context requests received with unsupported extension headers.
Back to CISCO-GTP-MIB MIB page.
IPHost Network monitor allows you to monitor cGtpUnsupportedExtHdr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.