With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoDlswCircuitS2CircuitId
cisco Data Link Switching Circuit S2 Circuit Id
1.3.6.1.4.1.9.10.9.1.5.2.1.13
The Circuit ID assigned to this circuit by the partner DLSw node. The first four octets are the DLC port Id, and the second four octets are the Data Link Correlator. If the DLSw SSP was not used to establish this circuit, the value will be a string of zero length.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswCircuitS2CircuitId 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.