With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ifStackLowerLayer
if Stack Lower Layer
1.3.6.1.2.1.31.1.2.1.2
The value of ifIndex corresponding to the lower sub- layer of the relationship, i.e., the sub-layer which runs 'below' the sub-layer identified by the corresponding instance of ifStackHigherLayer. If there is no lower sub-layer, then this object has the value 0.
Back to ibm_mainframe-Ifmib MIB page.
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