With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpsGlobalTotalSecureAddress
cps Global Total Secure Address
1.3.6.1.4.1.9.9.315.1.1.2
in the device.
Back to CISCO-PORT-SECURITY-MIB MIB page.
IPHost Network monitor allows you to monitor cpsGlobalTotalSecureAddress 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.