With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnnEouHostQueryInterface
cnn Eou Host Query Interface
1.3.6.1.4.1.9.9.484.1.4.7.1.3
An index value that uniquely identifies an interface where the end point device is 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 cnnEouHostQueryInterface 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.