CONFIGURATION mode
tacacs-server host x.x.x.x key some-password
Example of Enabling Authentication from the RADIUS Server
Example of Enabling Local Authentication for the Console and Remote Authentication for VTY Lines
To get enable authentication from the RADIUS server and use TACACS as a backup, issue the
following commands.
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 authentication for enable secret on the console, while using remote authentication on
VTY lines, issue the following commands.
Dell(config)# aaa authentication enable mymethodlist radius tacacs
Dell(config)# line vty 0 9
Dell(config-line-vty)# enable authentication mymethodlist

Server-Side Configuration

•TACACS+ — When using TACACS+, Dell Networking 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 system sends an authentication packet with the
following:
Username: $enab15$
Password: <password-entered-by-user>
Therefore, the RADIUS server must have an entry for this username.
AAA Authorization
The Dell Networking OS enables AAA new-model by default.
You can set authorization to be either local or remote. Different combinations of authentication and
authorization yield different results. By default, the system sets both to local.

Privilege Levels Overview

Limiting access to the system is one method of protecting the system and your network. However, at
times, you might need to allow others access to the router and you can limit that access to a subset of
commands. In the Dell Networking OS, you can configure a privilege level for users who need limited
access to the system.
Every command in the Dell Networking OS is assigned a privilege level of 0, 1, or 15. You can configure
up to 16 privilege levels. The Dell Networking OS is pre-configured with three privilege levels and you can
configure 13 more. The three pre-configured levels are:
786 Security