We recently changed a node from a router to a layer 3 switch and realized that we would probably lose all the data we collected on the node for the set period. How can we retrieve the past months data after on the previous device after it has been replaced with another of a different make but same management IP.
Did you delete the old node? If so, the data is probably gone. If you didn't delete the node, but just swapped the device, it's probably still in the historical data for the existing IP. When you say "retrieve", what do you want to do with it?