With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
btdsLCoRequiredTxBandwidth
btds L Co Required Tx Bandwidth
This attribute gives the actual bandwidth (in bits per second) reserved by this path on each of the trunks of its route. This attribute represents the bandwidth for traffic outgoing to the remote end point. The originating end of the connection determines this value.
Back to Nortel-Magellan-Passport-BitTransparentMIB MIB page.
IPHost Network monitor allows you to monitor btdsLCoRequiredTxBandwidth 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.