User's Manual

3-39
Cisco 3200 Series Wireless MIC Software Configuration Guide
OL-7734-02
Chapter 3 Administering the WMIC
Configuring and Enabling RADIUS
Defining AAA Server Groups
Configure the bridge to use AAA server groups to group existing server hosts for authentication. Select
a subset of the configured server hosts and use them for a particular service. The server group is used
with a global server-host list, which lists the IP addresses of the selected server hosts.
Server groups also can include multiple host entries for the same server if each entry has a unique
identifier (the combination of the IP address and UDP port number), allowing different ports to be
individually defined as RADIUS hosts providing a specific AAA service. If you configure two different
host entries on the same RADIUS server for the same service (such as accounting), the second
configured host entry acts as a fail-over backup to the first one.
Use the server group server configuration command to associate a particular server with a defined group
server. Identify the server by its IP address or identify multiple host instances or entries by using the
optional auth-port and acct-port keywords.
Beginning in privileged EXEC mode, follow these steps to define the AAA server group and associate a
particular RADIUS server with it:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
aaa new-model Enable AAA.
Step 3
radius-server host {hostname
| ip-address} [auth-port
port-number] [acct-port
port-number] [timeout
seconds] [retransmit retries]
[key string]
Specify the IP address or host name of the remote RADIUS server host.
(Optional) For auth-port port-number, specify the UDP destination port for
authentication requests.
(Optional) For acct-port port-number, specify the UDP destination port for
accounting requests.
(Optional) For timeout seconds, specify the time interval that the bridge waits for
the RADIUS server to reply before retransmitting. The range is 1 to 1000. This
setting overrides the radius-server timeout global configuration command
setting. If no timeout is set with the radius-server host command, the setting of
the radius-server timeout command is used.
(Optional) For retransmit retries, specify the number of times a RADIUS
request is resent to a server if that server is not responding or responding slowly.
The range is 1 to 1000. If no retransmit value is set with the radius-server host
command, the setting of the radius-server retransmit global configuration
command is used.
(Optional) For key string, specify the authentication and encryption key used
between the bridge and the RADIUS daemon running on the RADIUS server.
Note The key is a text string that must match the encryption key used on the
RADIUS server. Always configure the key as the last item in the
radius-server host command. 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.
To configure the bridge to recognize more than one host entry associated with a single
IP address, enter this command as many times as necessary, making sure that each
UDP port number is different. The bridge software searches for hosts in the order in
which you specify them. Set the timeout, retransmit, and encryption key values to use
with the specific RADIUS host.