Hi,
Please sign up to Central with your region. Please find the answers inline
https://portalprod2.central.arubanetworks.com/platform/signup/registration#/SIGNUP.
1. Do we need a local Agent/Probe to Aruba Central to communicate with devices?
Only thing device should be able to reach activate to get the central account details and devices will establish websocket connection with central.
Below cli help to check the connection status on AP to activate and central
show activate
show ap debug cloud-server
2. Do we need to configure anything on devices ?
As mentioned above if device is reachable to activate, you don't need to configure anything on device. Once devices are up , you can push configuration from central.
3. How Aruba Central find that devices ?
Since devices are shipped and they should be added in activate.
Once you add device to central , Central check with activate and it will be mapped with your central account.
Hope this is helpful
Thanks