With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alL2tpStatsTunnelTotalSessions
ALTIGA L2tp Statistics Tunnel Total Sessions
1.3.6.1.4.1.3076.2.1.2.16.2.1.27
This object contains the total number of sessions that this tunnel has successfully connected through to its tunnel peer since this tunnel was created.
Back to ALTIGA-L2TP-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor alL2tpStatsTunnelTotalSessions on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.