AAA Authentication Troubleshooting:

AAA Authentication Base Configuration:

1) To enable AAA:

(config)# aaa new-model (to enable aaa)

2) To create a Server Object:

(config)# radius server <SERVER-NAME> (to create radius server group)

(config-radius-server)# address ipv4 <IP ADDRESS> auth-port 1812

(config-radius-server)# key <KEY NAME> (for pre-shared key)

3) To create a Server Group:

(config)# aaa group server radius <SERVER GROUP>

(config-sg-radius)# server name <SERVER NAME>

4)To create a AAA Authentication Method:

(config)# aaa authentication login <METHOD NAME> group <SERVER GROUP>

(config)# line vty 0 4

(config-line)# login authentication <METHOD NAME>