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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-29225-01
Chapter 13 Configuring RADIUS and TACACS+ Servers
Configuring and Enabling RADIUS
This example shows how to set up two main servers and a local authenticator with a server deadtime of
10 minutes:
AP(config)# aaa new-model
AP(config)# radius-server host 172.20.0.1 auth-port 1000 acct-port 1001 key 77654
AP(config)# radius-server host 172.10.0.1 auth-port 1645 acct-port 1646 key 77654
AP(config)# radius-server host 10.91.6.151 auth-port 1812 acct-port 1813 key 110337
AP(config)# radius-server deadtime 10
To return to the default setting for retransmit, timeout, and deadtime, use the no forms of these
commands.
Configuring the Access Point to Use Vendor-Specific RADIUS Attributes
The Internet Engineering Task Force (IETF) draft standard specifies a method for communicating
vendor-specific information between the access point and the RADIUS server by using the
vendor-specific attribute (attribute 26). Vendor-specific attributes (VSAs) allow vendors to support their
own extended attributes not suitable for general use. The Cisco RADIUS implementation supports one
vendor-specific option by using the format recommended in the specification. Cisco’s vendor ID is 9,
and the supported option has vendor type 1, which is named cisco-avpair. The value is a string with this
format:
protocol : attribute sep value *
Protocol is a value of the Cisco protocol attribute for a particular type of authorization. Attribute and
value are an appropriate AV pair defined in the Cisco TACACS+ specification, and sep is = for
mandatory attributes and the asterisk (*) for optional attributes. This allows the full set of features
available for TACACS+ authorization to also be used for RADIUS.
For example, the following AV pair activates Cisco’s multiple named ip address pools feature during IP
authorization (during PPP’s IPCP address assignment):
cisco-avpair= ”ip:addr-pool=first“
The following example shows how to provide a user logging in from an access point with immediate
access to privileged EXEC commands:
cisco-avpair= ”shell:priv-lvl=15“
Other vendors have their own unique vendor IDs, options, and associated VSAs. For more information
about vendor IDs and VSAs, refer to RFC 2138, “Remote Authentication Dial-In User Service
(RADIUS).”
Beginning in privileged EXEC mode, follow these steps to configure the access point to recognize and
use VSAs: