With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frDteIllegalDlci
Frame Relay Dte Illegal Dlci
Count of received frames discarded because their Q.922 address was not two octets in length. This count also includes frames discarded because they were received on a Dlci reserved for LMI which had not been provisioned active. This counter will wrap around to 0 when it exceeds its maximum count.
Back to Nortel-Magellan-Passport-FrameRelayDteMIB MIB page.
IPHost Network monitor allows you to monitor frDteIllegalDlci 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.