With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ibmVlanMaxPortMap
ibm Vlan Max Port Map
1.3.6.1.4.1.2.5.8.4.3.1.1.3
This is the maximum number of octets this agent supports for representing ports in the the Port Map objects which use the textual convention IbmVlanPortMap.
Back to ibm-ibmlanex MIB page.
IPHost Network monitor allows you to monitor ibmVlanMaxPortMap on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM switches right now.