With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdeTConnConfigDestMac
Cisco DLSW T Connection Config Destination Mac
1.3.6.1.4.1.9.9.74.1.3.1.1.11
Permits the peer connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address. If no expolorer traffic with a destination address of cdeTConnConfigDestMac is received by DLSw, the peer reprented by this conceptual row will not be connected.
Back to CISCO-DLSW-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cdeTConnConfigDestMac on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.