With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cisco Data Link Switching T Connection Statistics Close Idles
The number of times transport connections in this node exited the connected state with zero active circuits on the transport connection.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswTConnStatCloseIdles on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.