**AAA Authentication Troubleshooting:** 

||show run %%|%% sec radius||

||debug aaa authentication|| 

**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>