With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
rlanActiveUserName
rlan Active User Name
1.3.6.1.4.1.2.6.119.4.5.1.2.1.1
could be null.
Back to ibm-ibmrlan MIB page.
IPHost Network monitor allows you to monitor rlanActiveUserName on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM servers right now.
