Cisco CATALYST 2960

9-20
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
OL-26520-01
Chapter 9 Configuring Switch-Based Authentication
Controlling Switch Access with RADIUS
The ACCEPT or REJECT response is bundled with additional data that is used for privileged EXEC or
network authorization. Users must first successfully complete RADIUS authentication before
proceeding to RADIUS authorization, if it is enabled. The additional data included with the ACCEPT or
REJECT packets includes these items:
• Telnet, SSH, rlogin, or privileged EXEC services
• Connection parameters, including the host or client IP address, access list, and user timeouts
RADIUS Change of Authorization
To use this feature, the switch must be running the LAN Base image.
This section provides an overview of the RADIUS interface including available primitives and how they
are used during a Change of Authorization (CoA).
• Overview, page 9-20
• Change-of-Authorization Requests, page 9-21
• CoA Request Response Code, page 9-22
• CoA Request Commands, page 9-23
• Session Reauthentication, page 9-23
• Stacking Guidelines for Session Termination, page 9-25
Overview
A standard RADIUS interface is typically used in a pulled model where the request originates from a
network attached device and the response come from the queried servers. Catalyst switches support the
RADIUS Change of Authorization (CoA) extensions defined in RFC 5176 that are typically used in a
pushed model and allow for the dynamic reconfiguring of sessions from external authentication,
authorization, and accounting (AAA) or policy servers.
Beginning with Cisco IOS Release 12.2(52)SE, the switch supports these per-session CoA requests:
• Session reauthentication
• Session termination
• Session termination with port shutdown
• Session termination with port bounce
This feature is integrated with the Cisco Secure Access Control Server (ACS) 5.1. For information about
ACS:
http://www.cisco.com/en/US/products/ps9911/tsd_products_support_series_home.html
The RADIUS interface is enabled by default on Catalyst switches. However, some basic configuration
is required for these attributes:
• Security and Password—See the “Preventing Unauthorized Access to Your Switch” section in the
“Configuring Switch-Based Authentication” chapter in the Catalyst 3750 Switch Software
Configuration Guide, Cisco Release 12.2(50)SE.
• Accounting—See the “Starting RADIUS Accounting” section in the “Configuring Switch-Based
Authentication” chapter in the Catalyst 3750 Switch Software Configuration Guide, 12.2(50)SE.