With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpSrtBpInternalLanId
Virtual Router Passport Srt Bridge Port Internal Lan Id
This attribute specifies the identifier for the internal logical LAN this port is attached. All SourceRouteBridge ports are assigned to a physical LAN and a logical internal LAN. Current source route bridge implementations limit the lanId to a value in the range 0 to 4095.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrPpSrtBpInternalLanId 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.