AAA Authentication Using Cisco Packet Tracer

Router(config)#aaa new-model
Router(config)#radius server myAAA
Router(config-radius-server)#address ipv4 192.168.100.100
Router(config-radius-server)#key
Router(config-radius-server)#key ?
LINE The UNCRYPTED (cleartext) shared key
Router(config-radius-server)#key saeed123
Router(config)#aaa authentication login default group radius local
Router(config)#line vty 0 15
Router(config-line)#login authentication default
Router(config-line)#^Z