With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alL2tpStatsControlSendPackets
ALTIGA L2tp Statistics Control Send Packets
1.3.6.1.4.1.3076.2.1.2.16.1.17
This object returns the number of control packets that were transmitted to tunnel endpoints.
Back to ALTIGA-L2TP-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor alL2tpStatsControlSendPackets 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.