With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnnEouHostResultMacAddr
cnn Eou Host Result Mac Addr
1.3.6.1.4.1.9.9.484.1.4.8.1.5
Indicates The MAC address of the detected host.
Back to CISCO-NAC-NAD-MIB MIB page.
IPHost Network monitor allows you to monitor cnnEouHostResultMacAddr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.