PLANET XGS3-24042 - Manual (Page 544)

55-3
Switch(config)#authentication line vty login tacacs
55.4 TACACS+ Troubleshooting
In configuring and using TACACS+, the TACACS+ may fail to authentication due to reasons such as physical
connection failure or wrong configurations. The user should ensure the following:
 First good condition of the TACACS+ server physical connection.
 Second all interface and link protocols are in the UP state (use “show interface” command).
 Then ensure the TACACS+ key configured on the switch is in accordance with the one configured on
TACACS+ server.
 Finally ensure to connect to the correct TACACS+ server.