Service Manual

Monitoring AAA Accounting
Dell Networking OS does not support periodic interim accounting because the periodic command can cause heavy congestion
when many users are logged in to the network.
No specic show command exists for TACACS+ accounting.
To obtain accounting records displaying information about users currently logged in, use the following command.
• Step through all active sessions and print all the accounting records for the actively accounted functions.
CONFIGURATION mode or EXEC Privilege mode
show accounting
Example of the show accounting Command for AAA Accounting
Dell#show accounting
Active accounted actions on tty2, User admin Priv 1
Task ID 1, EXEC Accounting record, 00:00:39 Elapsed, service=shell
Active accounted actions on tty3, User admin Priv 1
Task ID 2, EXEC Accounting record, 00:00:26 Elapsed, service=shell
Dell#
AAA Authentication
Dell Networking OS supports a distributed client/server system implemented through authentication, authorization, and accounting
(AAA) to help secure networks against unauthorized access.
In the Dell Networking implementation, the Dell Networking system acts as a RADIUS or TACACS+ client and sends authentication
requests to a central remote authentication dial-in service (RADIUS) or Terminal access controller access control system plus
(TACACS+) server that contains all user authentication and network service access information.
Dell Networking uses local usernames/passwords (stored on the Dell Networking system) or AAA for login authentication. With AAA,
you can specify the security protocol or mechanism for dierent login methods and dierent users. In Dell Networking OS, AAA uses
a list of authentication methods, called method lists, to dene the types of authentication and the sequence in which they are
applied. You can dene a method list or use the default method list. User-dened method lists take precedence over the default
method list.
NOTE: If a console user logs in with RADIUS authentication, the privilege level is applied from the RADIUS server if the
privilege level is congured for that user in RADIUS, whether you congure RADIUS authorization.
NOTE: RADIUS and TACACS servers support VRF-awareness functionality. You can create RADIUS and TACACS groups
and then map multiple servers to a group. The group to which you map multiple servers is bound to a single VRF.
Conguration Task List for AAA Authentication
The following sections provide the conguration tasks.
• Congure Login Authentication for Terminal Lines
• Conguring AAA Authentication Login Methods
• Enabling AAA Authentication
For a complete list of all commands related to login authentication, refer to the Security chapter in the Dell Networking OS
Command Reference Guide.
Congure Login Authentication for Terminal Lines
You can assign up to ve authentication methods to a method list. Dell Networking OS evaluates the methods in the order in which
you enter them in each list.
If the rst method list does not respond or returns an error, Dell Networking OS applies the next method list until the user either
passes or fails the authentication. If the user fails a method list, Dell Networking OS does not apply the next method list.
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Security