Microsoft KB Archive/219277

= Load Balancing HTTP with WLBS =

Article ID: 219277

Article Last Modified on 2/26/2007

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APPLIES TO


 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition
 * Microsoft Windows NT Load Balancing Service

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This article was previously published under Q219277



SUMMARY
This article explains how to load balance traffic to Web servers using Windows NT Load Balancing Service (WLBS).



MORE INFORMATION
To load balance traffic to Web servers, perform the following steps:
 * 1) Web servers typically listen on port 80. Configure one port rule on all cluster hosts for a port range of 80 to 80 and select Both for protocols (TCP and UDP).
 * 2) Click to select Multiple Hosts. Affinity should be set to None, unless the Web server maintains client state in its memory, in which case Affinity must be set to either Single or Class C.

If you want to load balance HTTP over SSL (encrypted Web traffic), you need to configure a rule for this type of traffic; usually, the port is 443. Us the following steps:
 * 1) Set up a rule for a port range of 443 to 443, both TCP and UDP.
 * 2) Set Affinity to either Single or Class C to ensure that the client connections are always handled by the server that has the SSL session established.

For additional information about how to configure port rules, click the article number below to view the article in the Microsoft Knowledge Base:

198496 How to Configure WLBS Port Rules

Additional query words: convoy load balancing iis

Keywords: kbinfo kbnetwork KB219277

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