Dell M6220 User Configuration Manual page 517

console(config)#aaa authentication dot1x default
radius
8 Enter Interface Configuration mode for ports 1–23 and enable MAC-
based authentication.
console(config)#interface range gi1/0/1-23
console(config-if)#dot1x port-control mac-based
9 Set the ports to an 802.1Q VLAN. The ports must be in general mode in
order to enable MAC-based 802.1X authentication.
console(config-if)#switchport mode general
console(config-if)#exit
console(config)#exit
Configuring Port and System Security
517