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    <title>About Vendor-Specific Attributes </title>
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<a name="wp1076586"> </a><h1 class="pTitle">
About Vendor-Specific Attributes

</h1>
<a name="wp1076587"> </a><p class="pBody">
The Internet Engineering Task Force (IETF) draft standard specifies a method for communicating 
vendor-specific attributes (VSAs) between the network access server and the RADIUS server. The IETF 
uses attribute 26. VSAs allow vendors to support their own extended attributes that are not suitable for 
general use. The Cisco RADIUS implementation supports one vendor-specific option using the format 
recommended in the specification. The Cisco vendor ID is 9, and the supported option is vendor type 1, 
which is named<b class="cBold"> cisco-avpair.</b> The value is a string with the following format:

</p>
<div class="pPreformattedRelative"><pre class="pPreformattedRelative">
protocol : attribute separator value *<a name="wp1076591"> </a>
<a name="wp1076592"> </a>
</pre></div>
<a name="wp1076593"> </a><p class="pBody">
Where<b class="cBold"> protocol </b>is a Cisco attribute for a particular type of authorization, <b class="cBold">separator </b>is <code class="cCode">= </code>(equal sign) for 
mandatory attributes, and <code class="cCode">* </code>(asterisk) is for optional attributes. 

</p>
<a name="wp1076594"> </a><p class="pBody">
When you use RADIUS servers to authenticate yourself to a Cisco MDS 9000 Family switch, the 
RADIUS protocol directs the RADIUS server to return user attributes, such as authorization 
information, along with authentication results. This authorization information is specified through 
VSAs.

</p>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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