With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceSessionIndex
trace Session Index
This variable represents the index for the traceSession tables.
Back to Nortel-Magellan-Passport-TraceBaseMIB MIB page.
IPHost Network monitor allows you to monitor traceSessionIndex 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.