How Are Dumb Terminals such as Printers Authenticated in an 802.1X Network?

Enable MAC address bypass authentication.

You can enable MAC address bypass authentication for terminals (such as printers) on which the 802.1X client software cannot be installed or used. After MAC address bypass authentication is configured on the interface, the device performs 802.1X authentication and starts the delay timer for MAC address bypass authentication. If 802.1X authentication still fails after the delay of MAC address bypass authentication, the device performs MAC address authentication.