With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoDlswDirNBEntry
cisco Data Link Switching Directory NB Entry
1.3.6.1.4.1.9.10.9.1.4.2.2.1
Indexed by ciscoDlswDirNBIndex.
Back to CISCO-DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoDlswDirNBEntry 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.