With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
lpImaLkFarEndUnusableSec
lp Ima Lk Far End Unusable Sec
This attribute counts the number of one second intervals during which the 'Tx/Rx Unusable' condition has been received from the far end. This attribute will always have a value of 0 if the protocol for the IMA group is proprietary.
Back to Nortel-Magellan-Passport-ImaMIB MIB page.
IPHost Network monitor allows you to monitor lpImaLkFarEndUnusableSec 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.