Users Guide

Monitoring RADIUS
To view information on RADIUS transactions, use the following command.
• View RADIUS transactions to troubleshoot problems.
EXEC Privilege mode
debug radius
TACACS+
Dell Networking OS supports terminal access controller access control system (TACACS+ client, including support for login authentication.
Configuration Task List for TACACS+
The following list includes the configuration task for TACACS+ functions.
• Choosing TACACS+ as the Authentication Method
• Monitoring TACACS+
• TACACS+ Remote Authentication
• Specifying a TACACS+ Server Host
For a complete listing of all commands related to TACACS+, refer to the Security chapter in the Dell Networking OS Command Reference
Guide.
Choosing TACACS+ as the Authentication Method
One of the login authentication methods available is TACACS+ and the user’s name and password are sent for authentication to the
TACACS hosts specified.
To use TACACS+ to authenticate users, specify at least one TACACS+ server for the system to communicate with and configure
TACACS+ as one of your authentication methods.
To select TACACS+ as the login authentication method, use the following commands.
1. Configure a TACACS+ server host.
CONFIGURATION mode
tacacs-server host {ip-address | host}
Enter the IP address or host name of the TACACS+ server.
Use this command multiple times to configure multiple TACACS+ server hosts.
2. Enter a text string (up to 16 characters long) as the name of the method list you wish to use with the TACAS+ authentication method.
CONFIGURATION mode
aaa authentication login {method-list-name | default} tacacs+ [...method3]
The TACACS+ method must not be the last method specified.
3. Enter LINE mode.
CONFIGURATION mode
line {aux 0 | console 0 | vty number [end-number]}
4. Assign the method-list to the terminal line.
LINE mode
login authentication {method-list-name | default}
To view the configuration, use the show config in LINE mode or the show running-config tacacs+ command in EXEC
Privilege mode.
If authentication fails using the primary method, Dell Networking OS employs the second method (or third method, if necessary)
automatically. For example, if the TACACS+ server is reachable, but the server key is invalid, Dell Networking OS proceeds to the next
authentication method. In the following example, the TACACS+ is incorrect, but the user is still authenticated by the secondary method.
First bold line: Server key purposely changed to incorrect value.
Security
679