With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gvcIfDlciDcDiscardPriority
General Vc Interface Dlci Dc Discard Priority
This attribute specifies the discard priority for outgoing call using this DLCI. The discard priority has three provisioning values: normal, high, and useDnaDefPriority. Traffic with normal priority is discarded first than the traffic with high priority. The Dna default value (provisioned by outDefaultPriority) is taken if this attribute is set to the value useDnaDefPriority. The default of discardPriority is useDnaDefPriority.
Back to Nortel-Magellan-Passport-GeneralVcInterfaceMIB MIB page.
IPHost Network monitor allows you to monitor gvcIfDlciDcDiscardPriority 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.