With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoDlswTConnTcpOperKeepAliveInt
cisco Data Link Switching T Connection Tcp Operation Keep Alive Interval
1.3.6.1.4.1.9.10.9.1.2.4.1.2.1.1
The time in seconds between TCP keepAlive messages when no traffic is flowing. Zero signifies no keepAlive protocol is operating.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswTConnTcpOperKeepAliveInt 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.