With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cnnEouIfTimeoutHoldPeriod
cnn Eou If Timeout Hold Period
1.3.6.1.4.1.9.9.484.1.3.1.1.6
The hold period of this interface. The hold period is the length of the time that can elapse before the client session entries are purged from the system due to client inactivity.
Back to CISCO-NAC-NAD-MIB MIB page.
IPHost Network monitor allows you to monitor cnnEouIfTimeoutHoldPeriod on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.