With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
capSidSessionAddressType
Cisco Admission Policy Sid Session Address Type
1.3.6.1.4.1.9.9.653.1.1.3.1.4
This object indicates the type of Internet address assigned for the host.
Back to CISCO-ADMISSION-POLICY-MIB MIB page.
IPHost Network monitor allows you to monitor capSidSessionAddressType 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.