With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
tn3270sStatsMaxSess
tn3270s Stats Max Sess
1.3.6.1.4.1.9.9.54.1.2.1.1.3
Number of Tn3270 sessions configured which are available to be used by tn3270 clients.
Back to CISCO-TN3270SERVER-MIB MIB page.
IPHost Network monitor allows you to monitor tn3270sStatsMaxSess on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.