With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrBrSrbProvTable
Virtual Router Br Srb Prov Table
This group contains all provisionable attributes associated with source route bridging. These attributes are global in nature as opposed to port specific.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrBrSrbProvTable 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 modems right now.