With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
swDldDldListTable
Software Dld Dld List Table
1.3.6.1.4.1.1588.2.1.1.1.2.260
This attribute holds the list of names of AVs to be downloaded. If a download is in progress, the first one in the list is the one currently being downloaded. As AVs are successfully downloaded, they are removed from this list and added to the downloadedAvList. The user cannot specify an AV which already exists on disk. It must first be removed before re-downloading it (see the Tidy and Remove commands).
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IPHost Network monitor allows you to monitor swDldDldListTable 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.