With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cshcAdjacencyUsageEntry
cshc Adjacency Usage Entry
1.3.6.1.4.1.9.9.663.1.1.2.3.1
Each row contains management information for adjacency hardware capacity on an entity, as specified by entPhysicalIndex in ENTITY-MIB.
Back to CISCO-SWITCH-HARDWARE-CAPACITY-MIB MIB page.
IPHost Network monitor allows you to monitor cshcAdjacencyUsageEntry 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.