With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoDlswTConnOperLocalTAddr
cisco Data Link Switching T Connection Operation Local T Address
1.3.6.1.4.1.9.10.9.1.2.3.1.2
The local transport address for this transport connection. This value could be different from ciscoDlswTConnConfigLocalAddr, if the value of the latter were changed after this transport connection was established.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswTConnOperLocalTAddr 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.