With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
btdsDpnss1Overruns
btds Dpnss1 Overruns
This attribute counts the number of frames received for which overruns occurred. This count wraps to zero after reaching its maximum value.
Back to Nortel-Magellan-Passport-BitTransparentMIB MIB page.
IPHost Network monitor allows you to monitor btdsDpnss1Overruns on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel switches right now.