Users Guide

CONFIGURATION mode
aaa authentication enable {method-list-name | default} method1 [... method4]
– default: uses the listed authentication methods that follow this argument as the default list of methods when a user
logs in.
– method-list-name: character string used to name the list of enable authentication methods activated when a user
logs in.
– method1 [... method4]: any of the following: RADIUS, TACACS, enable, line, none.
If you do not set the default list, only the local enable is checked. This setting has the same effect as issuing an aaa
authentication enable default enable
command.
Enabling AAA Authentication — RADIUS
To enable authentication from the RADIUS server, and use TACACS as a backup, use the following commands.
1 Enable RADIUS and set up TACACS as backup.
CONFIGURATION mode
aaa authentication enable default radius tacacs
2 Establish a host address and password.
CONFIGURATION mode
radius-server host x.x.x.x key some-password
3 Establish a host address and password.
CONFIGURATION mode
tacacs-server host x.x.x.x key some-password
Examples of the enable commands for RADIUS
To get enable authentication from the RADIUS server and use TACACS as a backup, issue the following commands.
The following example shows enabling authentication from the RADIUS server.
Dell(config)# aaa authentication enable default radius tacacs
Radius and TACACS server has to be properly setup for this.
Dell(config)# radius-server host x.x.x.x key <some-password>
Dell(config)# tacacs-server host x.x.x.x key <some-password>
To use local enable authentication on the console, while using remote authentication on VTY lines, run the following
commands.
The following example shows enabling local authentication for console and remote authentication for the VTY lines.
Dell(config)# aaa authentication enable mymethodlist radius tacacs
Dell(config)# line vty 0 9
Dell(config-line-vty)# enable authentication mymethodlist
Server-Side Configuration
Using AAA authentication, the switch acts as a RADIUS or TACACS+ client to send authentication requests to a TACACS+ or
RADIUS server.
• TACACS+ — When using TACACS+, the switch sends an initial packet with service type SVC_ENABLE, and then sends a
second packet with just the password. The TACACS server must have an entry for username $enable$.
• RADIUS — When using RADIUS authentication, the switch sends an authentication packet with the following:
Username: $enab15$
Password: <password-entered-by-user>
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