Administrator Guide

system, the message-of-the-day (MOTD) banner is displayed first, followed by the login banner and prompts.
After you log in to the system with valid authentication credentials, the EXEC banner is shown.
You can use the MOTD banner to alert users of critical upcoming events so that they can plan and schedule
their accessibility to the device. You can modify the banner messages depending on the requirements or
conditions.
Accessing the I/O Aggregator Using the
CMC Console Only
This functionality is supported on the Aggregator.
You can enable the option to access and administer an Aggregator only using the chassis management
controller (CMC) interface, and prevent the usage of the CLI interface of the device to configure and monitor
settings. You can configure the restrict-access session command to disable access of the Aggregator using a
Telnet or SSH session; the device is accessible only using the CMC GUI. You can use the no version of this
command to reactivate the Telnet or SSH session capability for the device. Use the show restrict-access
command to view whether the access to a device using Telnet or SSH is disabled or not.
AAA Accounting
Accounting, authentication, and authorization (AAA) accounting is part of the AAA security model.
For details about commands related to AAA security, refer to the Security chapter in the Dell Networking OS
Command Reference Guide.
AAA accounting enables tracking of services that users are accessing and the amount of network resources
being consumed by those services. When you enable AAA accounting, the network server reports user activity
to the security server in the form of accounting records. Each accounting record comprises accounting
attribute/value (AV) pairs and is stored on the access control server.
As with authentication and authorization, you must configure AAA accounting by defining a named list of
accounting methods and then applying that list to various virtual terminal line (VTY) lines.
Configuration Task List for AAA Accounting
The following sections present the AAA accounting configuration tasks.
• Enabling AAA Accounting (mandatory)
• Suppressing AAA Accounting for Null Username Sessions (optional)
• Configuring Accounting of EXEC and Privilege-Level Command Usage (optional)
• Configuring AAA Accounting for Terminal Lines (optional)
• Monitoring AAA Accounting (optional)
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