Readme for Microsoft Application Request Routing Version 3

Introduction

This section of the documentation applies to Microsoft Application Request Routing Version 3 .

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.

ARR Version 3 is an incremental release that includes all of the features from Version 2.5, and adds support for Web Sockets.

Features

ARR Version 3 includes the following key features:

WebSocket Support
ARRv3 supports proxying and load balancing of Websocket connections.
Retries for URL health check
It supports multiple retries of URL health check before marking server unhealthy.

Installation Notes

Application Request Routing installs the following products:

Microsoft URL Rewrite Module Version 2 for IIS 7.0
Microsoft Web Farm Framework Version 1.1 for IIS 7.0
Microsoft Application Request Routing Version 3
Microsoft External Cache Version 1 for IIS 7.0

Uninstalling

To remove Application Request Routing, in Programs and Features in Control Panel, select the following programs and click Uninstall under Uninstall or change a program. All 4 products mentioned above must be uninstalled individually.

Support

ARR Version 2 is a Released To Web (RTW) product and the support is provided by Microsoft Help and Support. The forum will remain active.

For More Information

Additional information on this module and ARR Version 2 are available on the Application Request Routing section on IIS.net.