Administrator Guide

2. You are prompted to force the users to re-authenticate while adding or removing a RADIUS/TACACS+ server.
CONFIGURATION mode
aaa authentication login method-list-name
Example:
Dell(config)#aaa authentication login vty_auth_list radius
Force all logged-in users to re-authenticate (y/n)?
3. You are prompted to force the users to re-authenticate whenever there is a change in the RADIUS server list..
CONFIGURATION mode
radius-server host IP Address
Example:
Dell(config)#radius-server host 192.100.0.12
Force all logged-in users to re-authenticate (y/n)?
Dell(config)#no radius-server host 192.100.0.12
Force all logged-in users to re-authenticate (y/n)?
AAA Authorization
The system 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. 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 system is pre-configured with three privilege levels and you can configure 13 more. The three pre-configured levels are:
● Privilege level 1 — is the default level for EXEC mode. At this level, you can interact with the router, for example, view
some show commands and Telnet and ping to test connectivity, but you cannot configure the router. This level is often
called the “user” level. One of the commands available in Privilege level 1 is the enable command, which you can use to
enter a specific privilege level.
● Privilege level 0 — contains only the end, enable, and disable commands.
● Privilege level 15 — the default level for the enable command, is the highest level. In this level you can access any
command in the system.
Privilege levels 2 through 14 are not configured and you can customize them for different users and access.
After you configure other privilege levels, enter those levels by adding the level parameter after the enable command or by
configuring a user name or password that corresponds to the privilege level. For more information about configuring user names,
refer to Configuring a Username and Password.
By default, commands in the Dell Networking OS are assigned to different privilege levels. You can access those commands only
if you have access to that privilege level. For example, to reach the protocol spanning-tree command, log in to the
router, enter the enable command for privilege level 15 (this privilege level is the default level for the command) and then
enter CONFIGURATION mode.
You can configure passwords to control access to the box and assign different privilege levels to users. The system supports the
use of passwords when you log in to the system and when you enter the enable command. If you move between privilege
levels, you are prompted for a password if you move to a higher privilege level.
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Security