To configure the authentication in the switches, use the following steps:
device(config)# username <username> privilege <0> password (Enter new password:)*******
Note
Each privilege has roles defined. For example: 0: read/write, 4: port configuration, 5: Read only.device(config)# aaa authentication login default radius local-auth-fallback
device(config)# radius-server host <ip> ssl-auth-port <ssl-port> default key <keystring>