Microsoft KB Archive/203597

= Load Balancing PPTP with WLBS =

Article ID: 203597

Article Last Modified on 2/20/2007

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APPLIES TO


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

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This article was previously published under Q203597



SUMMARY
This article describes how to configure WLBS to provide load balancing and failover for PPTP servers.



MORE INFORMATION
Two network interface cards (NICs) must be used on each Windows NT Load Balancing Service (WLBS) host for this deployment. One NIC must be set to respond to the WLBS virtual IP address, while the other is set to respond to the dedicated IP address unique to each system. Because of a current limitation of VPN, these two addresses must be in different Class C address spaces.

For additional information about how to configure WLBS using multiple NICs, please see the following article in the Microsoft Knowledge Base:

197991 How to Configure WLBS Using Multiple Network Interface Cards

To use WLBS to provide simple failover:

Do not create any port rules. The host with the highest host priority (that is, "1") set in the WLBS Setup screen will handle all incoming connections by default. Upon node failure, all connections will then be handled by the node with the second highest host priority (that is, "2").

To use WLBS to provide load balancing between PPTP servers:

Set one port rule on all cluster hosts. The port rule should be for port range 0 to 65,535 (that is, all ports), with Single Affinity set. This is the default port rule for WLBS.

For additional information about how to configure WLBS port rules, please see the following article in the Microsoft Knowledge Base:

198496 How to Configure WLBS Port Rules

NOTE: Client sessions handled by a particular cluster host will break if the host becomes unavailable. Clients will then be prompted to log on again, with their new session then being handled by the appropriate remaining host.

Additional query words: Convoy

Keywords: kbinfo KB203597

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