With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ifNumber
if Number
1.3.6.1.4.1.11.2.17.4.1.5.2.1.7
The number of network interfaces (regardless of their current state) present on this system.
Back to ibm_mainframe-Ifmib MIB page.
IPHost Network monitor allows you to monitor ifNumber on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM computers right now.