This is included in the scan server as Asset Radar.
See Introduction to Asset Radar
Asset Radar serves to quickly capture information about devices (e.g. BYOD and rogue devices) that connect to your network. It leverages network capture technology in use by well known packet tracing software to discover device information. If an IPv4 or IPv6 address is found while capturing and Asset Radar is set to Enabled, the device is added to the IP scanning queue for a more complete scan and an asset may be generated. Your mapped credentials are used at this point.
