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Catalyst 2928 Switch Software Configuration Guide
OL-23389-01
Chapter 8 Configuring Switch-Based Authentication
Controlling Switch Access with RADIUS
Configuring the Switch for Vendor-Proprietary RADIUS Server Communication
Although an IETF draft standard for RADIUS specifies a method for communicating vendor-proprietary
information between the switch and the RADIUS server, some vendors have extended the RADIUS
attribute set in a unique way. Cisco IOS software supports a subset of vendor-proprietary RADIUS
attributes.
As mentioned earlier, to configure RADIUS (whether vendor-proprietary or IETF draft-compliant), you
must specify the host running the RADIUS server daemon and the secret text string it shares with the
switch. You specify the RADIUS host and secret text string by using the
radius-server
global
configuration commands.
Beginning in privileged EXEC mode, follow these steps to specify a vendor-proprietary RADIUS server
host and a shared secret text string:
To delete the vendor-proprietary RADIUS host, use the
no
radius-server host
{
hostname
|
ip-address
}
non-standard
global configuration command. To disable the key, use the
no radius-server key
global
configuration command.
This example shows how to specify a vendor-proprietary RADIUS host and to use a secret key of
rad124
between the switch and the server:
Switch(config)#
radius-server host 172.20.30.15 nonstandard
Switch(config)#
radius-server key rad124
Displaying the RADIUS Configuration
To display the RADIUS configuration, use the
show running-config
privileged EXEC command.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
radius-server host
{
hostname
|
ip-address
}
non-standard
Specify the IP address or hostname of the remote
RADIUS server host and identify that it is using a
vendor-proprietary implementation of RADIUS.
Step 3
radius-server key
string
Specify the shared secret text string used between the
switch and the vendor-proprietary RADIUS server.
The switch and the RADIUS server use this text
string to encrypt passwords and exchange responses.
Note
The key is a text string that must match the
encryption key used on the RADIUS server.
Leading spaces are ignored, but spaces within
and at the end of the key are used. If you use
spaces in your key, do not enclose the key in
quotation marks unless the quotation marks
are part of the key.
Step 4
end
Return to privileged EXEC mode.
Step 5
show running-config
Verify your settings.
Step 6
copy running-config startup-config
(Optional) Save your entries in the configuration file.
