75 
2. 
Configure the RADIUS server 
# Create RADIUS user aaa and enter its view. 
<SwitchB> system-view 
[SwitchB] radius-server user aaa 
# Configure simple-text password aabbcc for user aaa.  
[SwitchB-rdsuser-aaa] password simple aabbcc 
[SwitchB-rdsuser-aaa] quit 
# Specify the IP address of the RADIUS client as 10.1.1.1 and the shared key as abc.  
[SwitchB] radius-server client-ip 10.1.1.1 key abc 
3.  Verify the configuration 
After entering username aaa@bbb or aaa and password aabbcc, user aaa can telnet to Switch A. Use 
the display connection command to view the connection information on Switch A.  
<SwitchA> display connection 
 
Index=1   ,Username=aaa@bbb 
IP=192.168.1.2 
IPv6=N/A 
 Total 1 connection(s) matched. 
Troubleshooting AAA 
Troubleshooting RADIUS 
Symptom 1 
User authentication/authorization always fails. 
Analysis 
1.  A communication failure exists between the NAS and the RADIUS server. 
2.  The username is not in the format of userid@isp-name or the ISP domain for the user authentication 
is not correctly configured on the NAS. 
3.  The user is not configured on the RADIUS server. 
4.  The password entered by the user is incorrect. 
5.  The RADIUS server and the NAS are configured with different shared key. 
Solution 
Check that: 
1.  The NAS and the RADIUS server can ping each other. 
2.  The username is in the userid@isp-name format and the ISP domain for the user authentication is 
correctly configured on the NAS.  
3.  The user is configured on the RADIUS server. 
4.  The correct password is entered. 
5.  The same shared key is configured on both the RADIUS server and the NAS.