Users Guide

Methods congured with the aaa authentication login command are evaluated in the order they are
congured. If users encounter an error with the rst method listed, Dell Networking OS applies the next method
congured. If users fail the rst method listed, no other methods are applied. The only exception is the local
method. If the user’s name is not listed in the local database, the next method is applied. If the correct user name/
password combination is not entered, the user is not allowed access to the switch.
NOTE: 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. The
TACACS+ is incorrect, but the user is still authenticated by the secondary method.
After conguring the aaa authentication login command, congure the login authentication
command to enable the authentication scheme on terminal lines.
Connections to the SSH server work with the following login mechanisms: local, radius, and tacacs.
Related Commands
• login authentication — enables AAA login authentication on the terminal lines.
• password — creates a password.
• radius-server host — species a RADIUS server host.
• tacacs-server host — species a TACACS+ server host.
aaa reauthenticate enable
Enable re-authentication of user whenever there is a change in the authenticators.
Syntax
aaa reauthenticate enable
To disable the re-authentication option, use the no aaa reauthenticate enable command.
Defaults Disabled
Command Modes CONFIGURATION
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.11(0.0) Introduced this command.
Usage Information
When an operating system enables to change the user authenticators, the users might access resources and
perform tasks that they do not have authorization.
Once re-authentication is enabled, Dell Networking OS prompts the users to re-authenticate whenever there is a
change in authenticators.
The change in authentication happens when:
• Add or remove an authentication server (RADIUS/TACACS+)
• Modify an AAA authentication/authorization list
• Change to role-only (RBAC) mode
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