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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 10 Configuring Switch-Based Authentication
Controlling Switch Access with Kerberos
Configuring RADIUS Server Load Balancing
This feature allows access and authentication requests to be evenly across all RADIUS servers in a server
group. For more information, see the “RADIUS Server Load Balancing” chapter of the “Cisco IOS
Security Configuration Guide”, Release 12.2:
http://www.ciscosystems.com/en/US/docs/ios/12_2sb/feature/guide/sbrdldbl.html
Displaying the RADIUS Configuration
To display the RADIUS configuration, use the show running-config privileged EXEC command.
Controlling Switch Access with Kerberos
This section describes how to enable and configure the Kerberos security system, which authenticates
requests for network resources by using a trusted third party.
These sections contain
this information:
• Understanding Kerberos, page 10-39
• Kerberos Operation, page 10-41
• Configuring Kerberos, page 10-42
For Kerberos configuration examples, see the “Kerb
eros Configuration Examples” section in the
“Security Server Protocols” chapter of the Cisco IOS Security Configuration Guide, Release 12.2, at th
is
URL:
http://www.cisco.com/en/US/products/sw/iosswrel/
ps1835/products_configuration_guide_book09186a
0080087df1.html
For complete syntax and usage informati
on for the commands used in this section, see the “Kerberos
Commands” section in the “Security Server Protocols” chapter of the Cisco IOS Security Command
Reference, Release 12.2, at th
is URL:
http://www.cisco.com/en/US/products/sw/iosswrel/
ps1835/products_command_reference_book09186a
0080087e33.html
Note In the Kerberos configuration examples and in the Cisco IOS Security Command Reference,
Release 12.2, th
e trusted third party can be a switch that supports Kerberos, that is configured as a
network security server, and that can authenticate users by using the Kerberos protocol.
Understanding Kerberos
Kerberos is a secret-key network authentication protocol, which was developed at the Massachusetts
Institute of Technology (MIT). It uses the Data Encryption Standard (DES) cryptographic algorithm for
encryption and authentication and authenticates requests for network resources. Kerberos uses the
concept of a trusted third party to perform secure verification of users and services. This trusted third
party is called the key distribution center (KDC).