With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alL2tpStatsTunnelControlAckTimeouts
ALTIGA L2tp Statistics Tunnel Control Ack Timeouts
1.3.6.1.4.1.3076.2.1.2.16.2.1.21
This object returns a count of the number of control packet timeouts due to the lack of a timely acknowledgement from the tunnel peer.
Back to ALTIGA-L2TP-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor alL2tpStatsTunnelControlAckTimeouts 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.