With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnDlciVcFrmCongestedToSubnet
appn Dlci Vc Frm Congested To Subnet
This attribute displays the number of frames from link discarded due to lack of resources. It keeps track of the number of frames from link that have to be discarded. The discard reasons include insufficient memory for splitting the frame into smaller subnet packet size.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnDlciVcFrmCongestedToSubnet 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 multiplexers right now.