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This article provides steps to resolve the following error:
NTA has received flow data from an unmanaged Interface
When NTA receives data flow from an unmanageable interface, it displays an event in NTA Traffic Analyzer pane.
This interface does not support SNMP, you can "register" it to NPM, and thus enable the NetFlow Receiver Service to process the flow data it exports to NTA. If the interface is not in NPM, NTA will drop the data flow.
All NTA versions
To add the unmanageable interface: