With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
lpImaLkRelativeDelay
lp Ima Lk Relative Delay
This attribute indicates the latest measured differential delay (rounded up in milliseconds) between this link and the link, in the same IMA group, having the least delay. A value of 4294967295 indicates that the relative delay could not be measured. This can be due to physical layer problems or to no IMA Control Protocol (ICP) cells being received on the link.
Back to Nortel-Magellan-Passport-ImaMIB MIB page.
IPHost Network monitor allows you to monitor lpImaLkRelativeDelay 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 secure routers right now.