With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
ibmfrBRSTrafficClassLastPacketOverflowHigh
ibmfr BRS Traffic Class Last Packet Overflow High
1.3.6.1.4.1.2.6.119.4.4.4.1.4.1.41
The total number of packets that could not be transmitted for this traffic class at priority level of high before the counter was being cleared.
Back to ibm-ibmfrbrs MIB page.
IPHost Network monitor allows you to monitor ibmfrBRSTrafficClassLastPacketOverflowHigh 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.