Configuration
You can configure a RADIUS with following command:
SWITCH(config)# radius-server host 192.168.76.140 key PRESHAREDKEY
SWITCH(config)# aaa authentication port-access eap-radius
SWITCH(config)# aaa port-access authenticator active
SWITCH(config)# aaa port-access authenticator activeConfiguring the Ports
On Aruba you are not configuring dot1x in the ports. Instead, you define a List of Ports, which should use dot1x. E.g. all Ports from 3 to 8:
SWITCH(config)#aaa port-access mac-based 3-8Guest VLAN
SWITCH(config)#aaa port-access mac-based 3-8 unauth-vid 50