With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
faVisitorTable
fa Visitor Table
1.3.6.1.2.1.44.1.5.3.1
A table containing the foreign agent's visitor list. The foreign agent updates this table in response to registration events from mobile nodes.
Back to MIP-MIB MIB page.
IPHost Network monitor allows you to monitor faVisitorTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.