With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ifHCInUcastPkts
if HC In Ucast Packets
1.3.6.1.2.1.31.1.1.1.7
The number of packets, delivered by this sub-layer to a higher (sub-)layer, which were not addressed to a multicast or broadcast address at this sub-layer. This object is a 64-bit version of ifInUcastPkts.
Back to ibm_mainframe-Ifmib MIB page.
IPHost Network monitor allows you to monitor ifHCInUcastPkts 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.