With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpTbpDesignatedCost
Virtual Router Passport Tbp Designated Cost
This attribute specifies the path cost of the designated port of the lan segment connected to the port.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrPpTbpDesignatedCost 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.