This variable indicates the result of the discovery operation after the operation has finished. 'noError': no discovery has been initiated or discovery was a success. 'destUnreachable': the interface is currently not usable. Interface is not operational, has no IP address assigned or has no associated direct route. The request could not be sent. 'internalError': an internal error was detected, discovery not initiated. Enabling logging and debugging might reveal more information in this case.