With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpSrseSteOutFrames
Virtual Router Passport Srse Ste Out Frames
This attribute specifies the number of Spanning Tree Frames transmitted on this bridge port. This counter will wrap to zero when it exceeds its maximum.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrPpSrseSteOutFrames 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.