Define your servers in a group
aaa group server radius RAD1
server name Auth-1
server name Auth-2Build each auth server's config
radius server Auth-1
address ipv4 192.168.55.1 auth-port 1645 acct-port 1646
timeout 2
retransmit 2
key *****************
radius server Auth-2
address ipv4 192.168.55.2 auth-port 1645 acct-port 1646
timeout 2
retransmit 2
key *****************Define the authentication process
aaa authentication login default group radius local enableDefine the authorization process
aaa authorization exec default group radius local if-authenticatedOptionally, set network services to still use the local database
aaa authorization network default local