With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnAdjNnOutOfSeqTdus
appn Adj Nn Out Of Seq Tdus
Number of out of sequence topology database updates (TDU) received from this node.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnAdjNnOutOfSeqTdus 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.