With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
tn3270sPuIndex
tn3270s Pu Index
1.3.6.1.4.1.9.9.54.1.3.1.1.1
Index used to uniquely identify each Node instance. This is the same as snaNodeAdminIndex in the NAU MIB.
Back to CISCO-TN3270SERVER-MIB MIB page.
IPHost Network monitor allows you to monitor tn3270sPuIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.
