With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpSrseBridgePortConfig
Virtual Router Passport Srse Bridge Port Config
This attribute specifies the bridge port's configuration. It indicates if the bridge port is operating as an access port or as a backbone port. An access bridge port does not encapsulate a MAC frame and does not preserve domain information in the encapsulation, whereas a backbone bridge port encapsulates the MAC frame and optionally preserves domain information in the encapsulated frame.A backbone bridge port is typically used to transport frames across a high bandwidth backbone network to another bridge unit for further processing/forwarding of the frame.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrPpSrseBridgePortConfig 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.