With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mnFAAddress
mn FA Address
1.3.6.1.2.1.44.1.3.2.1.1.1
Foreign agent's IP address.
Back to MIP-MIB MIB page.
IPHost Network monitor allows you to monitor mnFAAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.