With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ctsiInDot1xModeIfCount
ctsi In Dot1x Mode If Count
1.3.6.1.4.1.9.9.740.1.10.1
The total number of interfaces on the device which is in TrustSec 802.1X mode.
Back to CISCO-TRUSTSEC-INTERFACE-MIB MIB page.
IPHost Network monitor allows you to monitor ctsiInDot1xModeIfCount on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.