How to identify device has already been discovered

[cisco_lite]

I have discovered certain devices successfully and certain unsuccessfully.

When I do to Admin -> Security and Monitor Devices, I can all the devices. Now how can I know which ones have been successfully discovered for which I will receive events.

[rajett]

The easiest way is to run a report for unknown devices.

Run a query of type "Unknown Event Report" for the last hour or so and look for events coming in from unknown IP addresses.

If it's unknown then you'll need to add it.