With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
rtgDpnMidIndex
rtg Dpn Mid Index
This variable represents the index for the rtgDpnMid tables.
Back to Nortel-Magellan-Passport-DpnRoutingMIB MIB page.
IPHost Network monitor allows you to monitor rtgDpnMidIndex 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.