With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnnEouHostResultAssocIf
cnn Eou Host Result Assoc If
1.3.6.1.4.1.9.9.484.1.4.8.1.2
An index value that uniquely identifies an interface where the end point device is currently connected. The interface identified by a particular value of this index is the same interface as identified by the same value of ifIndex.
Back to CISCO-NAC-NAD-MIB MIB page.
IPHost Network monitor allows you to monitor cnnEouHostResultAssocIf on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.