The Discover Network Devices command forces NDCC to refresh the list of network devices. This command scans the entire network and retrieves and displays the information.
You should not normally need to use the Discover Network Devices command. The locking, unlocking, and commissioning of devices triggers the Discover Network Devices command immediately. However, in large systems you may need to use the Discover Network Devices command if a newly added or commissioned device does not appear immediately.