Related Topics
Starting RADIUS Accounting, on page 72
Vendor-Specific RADIUS Attributes
The Internet Engineering Task Force (IETF) draft standard specifies a method for communicating
vendor-specific information between the switch 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 attributevalue (AV) pair defined in the Cisco TACACS+ specification, and sep is = for
mandatory attributes and is * for optional attributes. The full set of features available for TACACS+
authorization can then be used for RADIUS.
Other vendors have their own unique vendor-IDs, options, and associated VSAs. For more information about
vendor-IDs and VSAs, see RFC 2138, “Remote Authentication Dial-In User Service (RADIUS).”
For a complete list of RADIUS attributes or more information about vendor-specific attribute 26, see the
“RADIUS Attributes” appendix in the Cisco IOS Security Configuration Guide.
Related Topics
Configuring the Switch to Use Vendor-Specific RADIUS Attributes, on page 75
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.
Related Topics
Configuring the Switch for Vendor-Proprietary RADIUS Server Communication, on page 75
Catalyst 2960-XR Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX1
64 OL-29434-01
Configuring RADIUS
Vendor-Specific RADIUS Attributes
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