With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
faVisitorHomeAgentAddress
fa Visitor Home Agent Address
1.3.6.1.2.1.44.1.5.3.1.1.3
Home agent IP address for that visiting mobile node.
Back to MIP-MIB MIB page.
IPHost Network monitor allows you to monitor faVisitorHomeAgentAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.