With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpFddiETBIfIndex
Virtual Router Passport Fddi ETB If Index
This attribute specifies the index into the Interface Table where in information about the media interface corresponding to the bridge port is maintained.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrPpFddiETBIfIndex 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.