With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoDlswDirLocateNBTable
cisco Data Link Switching Directory Locate NB Table
1.3.6.1.4.1.9.10.9.1.4.3.2
This table is used to retrieve all entries in the ciscoDlswDirNBTable that match a given NetBIOS name, in the order of the best matched first, the second best matched second, and so on. We should fall out of the table, if a GET-NEXT of the least matched entry is requested.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswDirLocateNBTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.