With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrPpTbclOutFilterDiscards
Virtual Router Passport Tbcl Out Filter Discards
This attribute is indicative of the number of frames discarded at the out filter point. This includes: a) frames discarded due to application of the filter defined with PCF for the out filter point and b) the frames discarded due to domain based filtering at the out filter point. This counter wraps around its maximum value of 4294967295.
Back to Nortel-Magellan-Passport-BridgeMIB MIB page.
IPHost Network monitor allows you to monitor vrPpTbclOutFilterDiscards 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.