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<h1><b>
<span style="mso-fareast-font-family: "Times New Roman"; mso-font-kerning: 18.0pt">
Readme for Microsoft Application Request Routing Version 3</span></b></h1>
<h2>Contents</h2>
<p><a href="#_Introduction">Introduction</a></p>
<p><a href="#_Features">Features</a></p>
<p><a href="#_InstallationNotes">Installation Notes</a></p>
<p> <a href="#_Uninstalling">Uninstalling</a></p>
<p><a href="#_Support">Support</a></p>
<p><a href="#_ForMoreInformation">For More Information</a></p>
<h2><a name="_Introduction"></a></h2>
<H2>Introduction</H2>
<P>This section of the documentation applies to <STRONG>Microsoft Application Request Routing Version
3 </STRONG>.</P>
<P>Microsoft Application Request Routing (ARR) is a proxy-based routing module that forwards HTTP requests to application servers based on HTTP headers, server variables, and load balance algorithms. </P>
<P>ARR Version 3 is an incremental release that includes all of the features from Version
2.5, and adds support for Web Sockets. </P>
<p> </p>
<H2>Features</H2>
<P>ARR Version 3 includes the following key features:</P>
<UL>
<LI><strong>WebSocket Support</strong><BR>ARRv3 supports proxying and load
balancing of Websocket connections.
<LI><strong>Retries for URL health check <br />
</strong>It supports multiple retries of URL health check before marking server
unhealthy.</UL>
<p> </p>
<h2><a name="_InstallationNotes"></a></h2>
<h2>Installation Notes</h2>
<p class="BulletedList1">Application Request Routing
<a href="http://go.microsoft.com/?linkid=9653506">installs</a> the following
products:</p>
<ul>
<li>
Microsoft URL Rewrite Module Version 2 for IIS 7.0
</li>
<li>
Microsoft Application Request Routing Version 3
</li>
<li>
Microsoft External Cache Version 1 for IIS 7.0
</li>
</ul>
<h3><a name="_Uninstalling"></a>Uninstalling</h3>
<p>To remove Application Request Routing, in <b>Programs and
Features</b> in <b>Control Panel</b>, select the following programs and
click <b>Uninstall</b> under <b>Uninstall or change a program</b>. All 3
products mentioned above must be uninstalled individually.</p>
<h2><a name="_Support"></a></h2> <H2>Support</H2>
<P>ARR Version 2 is a Released To Web (RTW) product and the support is provided by <A href="http://support.microsoft.com/" mce_href="http://support.microsoft.com/">Microsoft Help and Support</A>. The <A href="http://forums.iis.net/1154.aspx" mce_href="http://forums.iis.net/1154.aspx">forum </A>will remain active.</P>
<h2><a name="_ForMoreInformation"></a></h2>
<h2>For More Information</h2>
<p>Additional information on this module and
<a href="http://go.microsoft.com/?linkid=9653505">ARR Version 2</a>
are available on the <a href="http://go.microsoft.com/?linkid=9168023">
Application Request Routing</a> section on <a href="http://www.iis.net/">
IIS.net</a>.</p>
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