With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
trkPorsStatsPktBpTable
trk Pors Stats Packet Bridge Port Table
This attribute counts the number of PORS packets received by the Trunk. It is an array indexed by the emission priorities (ep0, ep1 and ep2) and discard priorities (dp0, dp1, dp2 and dp3) of the packets. The highest emission priority is ep0 and the least discardable priority is dp0. These counters wrap around to zero when the maximum value is exceeded.
Back to Nortel-Magellan-Passport-TrunksMIB MIB page.
IPHost Network monitor allows you to monitor trkPorsStatsPktBpTable 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.