With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dlswNodeStatus
dlsw Node Status
1.3.6.1.4.1.2011.2.34.1.5
The status of the DLSw part of the system. Changing the value from active to inactive causes DLSw to take the following actions - (1) it disconnects all circuits through all DLSw partners, (2) it disconnects all transport connections to all DLSw partners, (3) it disconnects all local DLC connections, and (4) it stops processing all DLC connection set-up traffic. Since these are destructive actions, the user should query the circuit and transport connection tables in advance to understand the effect this action will have. Changing the value from inactive to active causes DLSw to come up in its initial state, i.e., transport connections established and ready to bring up circuits.
Back to DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor dlswNodeStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.