With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
tn3270sLuClientTcpPort
tn3270s Lu Client Tcp Port
1.3.6.1.4.1.9.9.54.1.5.1.1.4
The TCP port of the TN3270 client connected to this LU.
Back to CISCO-TN3270SERVER-MIB MIB page.
IPHost Network monitor allows you to monitor tn3270sLuClientTcpPort 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.