With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpsmPortBindNextFreeIndex
Cisco Port Security Manager Port Bind Next Free Index
1.3.6.1.4.1.9.9.364.1.1.19.1.3
Represents the next free index value for a port binding entry. If the value of this object is non-zero, then it represents the next free index value. If the value of this object is zero, then there are no more free indices available on this VSAN/VLAN.
Back to CISCO-PSM-MIB MIB page.
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