With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpaeAuthFailUserTable
Cisco Port Access Entity Authentication Fail User Table
1.3.6.1.4.1.9.9.220.1.6
A table to list user information for each port on the system supported by the Port Access Entity and assigned to Auth-Fail Vlan.
Back to CISCO-PAE-MIB MIB page.
IPHost Network monitor allows you to monitor cpaeAuthFailUserTable 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.