The Cisco ISE Profiler is the component of the Cisco Identity Services Engine (ISE) platform that is responsible for endpoint detection and classification. It does so by using a probe or series of probes that collect attributes about an endpoint. The profiler then compares the collected attributes to predefined device signatures to locate a match.
In the early days of identity-based networks and 802.1X, countless hours were spent identifying all the devices that did not have supplicants—in other words, the devices that could not authenticate to the network using 802.1X, such as printers and fax machines. Your choices were to identify the port connected to the printer and configure it to either
Not use 802.1X
Use MAC Authentication ...