With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
lecMacQueryAddress
LAN Emulation Client Mac Query Address
1.3.6.1.4.1.353.5.3.1.1.12.1.2
The MAC address whose binding the network management station wants to look up. When written: Triggers a new query. (Note that the SNMP agent is free to reject multicast and broadcast addresses with a 'badValue' error.) When read: Returns the last MAC address queried, or all zeroes if lecMacQueryLecIndex is 0.
Back to ibm-lec MIB page.
IPHost Network monitor allows you to monitor lecMacQueryAddress 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.