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MS Windows NT Load Balancing Service (WLBS)

Archived content. No warranty is made as to technical accuracy. Content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
Published: January 20, 1999

WLBS enhances the scalability and reliability of TCP/IP-based network services and applications running on Microsoft® Windows NT® Server 4.0, Enterprise Edition.

To copy WLBS to your computer, please read the Supplemental Microsoft Software License Terms below.

This update enables you to:

  • Scale your IP-based services across up to 32 Windows NT systems.

  • Seamlessly work through both planned and unplanned downtime.

  • Deploy using your existing network and hardware, without taking your services offline.

Microsoft's Windows NT Load Balancing Service (WLBS) is the IP load balancing feature of Windows NT Server 4.0, Enterprise Edition. WLBS employs a fully distributed clustering design ideal for creating highly available and scalable IP-based services such as Web, virtual private networking, streaming media, and proxy services. With minimal impact on your existing network, create services that can transparently grow with your business while seamlessly handling both planned and unplanned server downtime.

Important Note Valid licenses of Windows NT Server 4.0, Enterprise Edition are required in order to download and use WLBS. For information on how to purchase Enterprise Edition today, please contact a local or mail order reseller near you.

Supplemental Microsoft Software License Terms

NOTICE THE LICENSE TERMS FOR THIS SOFTWARE VARY DEPENDING UPON WHICH OF THE APPLICABLE QUALIFYING PRODUCTS YOU PREVIOUSLY LICENSED. IF YOU HAVE LICENSED MICROSOFT WINDOWS NT SERVER, ENTERPRISE EDITION 4.0, THE TERMS OF SECTION I APPLY TO YOU. IF YOU HAVE LICENSED CONVOY CLUSTER SOFTWARE FROM VALENCE RESEARCH, INC., THE TERMS OF SECTION II APPLY TO YOU.

SECTION I:

IMPORTANT: READ CAREFULLY – This Microsoft Corporation ("Microsoft") operating system component, including any "online" or electronic documentation ("OS Component") is subject to the terms and conditions of the agreement under which you have licensed Microsoft Windows NT Server, Enterprise Edition 4.0 ("Microsoft Software License Terms " or "license terms") and the terms and conditions of these supplemental license terms. BY INSTALLING, COPYING OR OTHERWISE USING THE OS COMPONENT, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE LICENSE TERMS AND THESE SUPPLEMENTAL LICENSE TERMS. IF YOU DO NOT AGREE TO THESE TERMS AND CONDITIONS, DO NOT INSTALL, COPY OR USE THE OS COMPONENT.

Note: IF YOU DO NOT HAVE VALID LICENSE TERMS FOR MICROSOFT WINDOWS NT SERVER, ENTERPRISE EDITION 4.0, YOU ARE NOT AUTHORIZED TO INSTALL, COPY OR OTHERWISE USE THE OS COMPONENT AND YOU HAVE NO RIGHTS UNDER THESE SUPPLEMENTAL LICENSE TERMS.

Capitalized terms used in these supplemental license terms and not otherwise defined herein shall have the meanings assigned to them in the license terms.

General. The OS Component is provided to you by Microsoft to update, supplement, or replace existing functionality of Windows NT Server, Enterprise Edition 4.0. Microsoft grants you a license to use the OS Component under the terms and conditions of the LICENSE TERMS (which are hereby incorporated by reference) and the terms and conditions set forth in these supplemental license terms, provided that you comply with all such terms and conditions. To the extent that any terms in these supplemental license terms conflict with terms in the LICENSE TERMS, the terms of these supplemental license terms control solely with respect to the OS Component.

Additional Rights and Limitations.

  • You may only reproduce, install and use one copy of the OS Component on a single computer which is validly licensed for Windows NT Server, Enterprise Edition 4.0.

  • If you have multiple validly licensed copies of Windows NT Server, Enterprise Edition 4.0, you may reproduce, install and use the OS Component under the terms and conditions set forth above with respect to each such validly licensed system. For each validly licensed copy of Windows NT Server, Enterprise Edition 4.0, you also may reproduce one additional copy of the OS Component solely for archival purposes or reinstallation of the OS Component on the same computer(s) as the OS Component was previously installed. Microsoft retains all right, title and interest in and to the OS Component. All rights not expressly granted are reserved by Microsoft.

IF MICROSOFT WINDOWS NT SERVER, ENTERPRISE EDITION 4.0 WAS LICENSED TO YOU BY MICROSOFT OR ANY OF ITS WHOLLY OWNED SUBSIDIARIES, THE LIMITED WARRANTY (IF ANY) INCLUDED IN THE WINDOWS NT SERVER, ENTERPRISE EDITION 4.0 LICENSE TERMS APPLIES TO THE OS COMPONENT PROVIDED THE OS COMPONENT HAS BEEN LICENSED BY YOU WITHIN THE TERM OF THE LIMITED WARRANTY IN THE WINDOWS NT SERVER, ENTERPRISE EDITION 4.0 LICENSE TERMS. HOWEVER, THESE SUPPLEMENTAL LICENSE TERMS DO NOT EXTEND THE TIME PERIOD FOR WHICH THE LIMITED WARRANTY IS PROVIDED.

IF MICROSOFT WINDOWS NT SERVER, ENTERPRISE EDITION 4.0 WAS LICENSED TO YOU BY AN ENTITY OTHER THAN MICROSOFT OR ANY OF ITS WHOLLY OWNED SUBSIDIARIES, MICROSOFT DISCLAIMS ALL WARRANTIES WITH RESPECT TO THE OS COMPONENT AS FOLLOWS:

DISCLAIMER OF WARRANTIES. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, MICROSOFT AND ITS SUPPLIERS PROVIDE TO YOU THE OS COMPONENT, AND ANY (IF ANY) SUPPORT SERVICES RELATED TO THE OS COMPONENT ("SUPPORT SERVICES") AS IS AND WITH ALL FAULTS; AND MICROSOFT AND ITS SUPPLIERS HEREBY DISCLAIM WITH RESPECT TO THE OS COMPONENT AND SUPPORT SERVICES ALL WARRANTIES AND CONDITIONS, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) WARRANTIES OR CONDITIONS OF OR RELATED TO: TITLE, NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS OF RESPONSES, RESULTS, LACK OF NEGLIGENCE OR LACK OF WORKMANLIKE EFFORT, QUIET ENJOYMENT, QUIET POSSESSION, AND CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE OS COMPONENT AND ANY SUPPORT SERVICES REMAINS WITH YOU.

EXCLUSION OF INCIDENTAL, CONSEQUENTIAL AND CERTAIN OTHER DAMAGES. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL MICROSOFT OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, BUT NOT LIMITED TO, DAMAGES FOR: LOSS OF PROFITS, LOSS OF CONFIDENTIAL OR OTHER INFORMATION, BUSINESS INTERRUPTION, PERSONAL INJURY, LOSS OF PRIVACY, FAILURE TO MEET ANY DUTY (INCLUDING OF GOOD FAITH OR OF REASONABLE CARE), NEGLIGENCE, AND ANY OTHER PECUNIARY OR OTHER LOSS WHATSOEVER) ARISING OUT OF OR IN ANY WAY RELATED TO THE USE OF OR INABILITY TO USE THE OS COMPONENT OR THE SUPPORT SERVICES, OR THE PROVISION OF OR FAILURE TO PROVIDE SUPPORT SERVICES, OR OTHERWISE UNDER OR IN CONNECTION WITH ANY PROVISION OF THESE SUPPLEMENTAL LICENSE TERMS, EVEN IN THE EVENT OF THE FAULT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, BREACH OF CONTRACT OR BREACH OF WARRANTY OF MICROSOFT OR ANY SUPPLIER, AND EVEN IF MICROSOFT OR ANY SUPPLIER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

LIMITATION OF LIABILITY AND REMEDIES. NOTWITHSTANDING ANY DAMAGES THAT YOU MIGHT INCUR FOR ANY REASON WHATSOEVER (INCLUDING, WITHOUT LIMITATION, ALL DAMAGES REFERENCED ABOVE AND ALL DIRECT OR GENERAL DAMAGES), THE ENTIRE LIABILITY OF MICROSOFT AND ANY OF ITS SUPPLIERS UNDER ANY PROVISION OF THESE SUPPLEMENTAL LICENSE TERMS AND YOUR EXCLUSIVE REMEDY FOR ALL OF THE FOREGOING SHALL BE LIMITED TO THE GREATER OF THE AMOUNT ACTUALLY PAID BY YOU FOR THE OS COMPONENT OR U.S.$5.00. THE FOREGOING LIMITATIONS, EXCLUSIONS AND DISCLAIMERS SHALL APPLY TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, EVEN IF ANY REMEDY FAILS ITS ESSENTIAL PURPOSE.

SECTION II:

IMPORTANT: READ CAREFULLY – This Microsoft Windows NT Load Balancing Service software, including any "online" or electronic documentation ("Software") is subject to the terms and conditions of the agreement under which you have licensed Convoy Cluster Software ("Convoy Cluster Software License Agreement") and the terms and conditions of this Supplemental License Agreement. BY INSTALLING, COPYING OR OTHERWISE USING THIS SOFTWARE, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE CONVOY CLUSTER SOFTWARE LICENSE AGREEMENT AND THIS SUPPLEMENTAL LICENSE AGREEMENT. IF YOU DO NOT AGREE TO THESE TERMS AND CONDITIONS, DO NOT INSTALL, COPY OR USE THE SOFTWARE.

Note: YOU MUST HAVE A VALIDLY LICENSED COPY OF CONVOY CLUSTER SOFTWARE, AND, BE VALIDLY LICENSED FOR CONVOY CLUSTER ANNUAL SOFTWARE MAINTENANCE SERVICE PURSUANT TO THE CONVOY SUPPORT POLICY IN ORDER TO INSTALL, COPY OR OTHERWISE USE THIS SOFTWARE. IF YOU ARE NOT VALIDLY LICENSED AS DESCRIBED HEREIN, YOU ARE NOT AUTHORIZD TO INSTALL, COPY OR OTHERWISE USE THIS SOFTWARE AND YOU HAVE NO RIGHTS UNDER THIS SUPPLEMENTAL LICENSE AGREEMENT.

General. The Software is provided to you by Microsoft to update, supplement, or replace existing functionality of Convoy Cluster Software. Microsoft grants you a license to use the Software under the terms and conditions of the Convoy Cluster Software License Agreement (which are hereby incorporated by reference) and the terms and conditions set forth in this Supplemental License Agreement, provided that you comply with all such terms and conditions. To the extent that any terms in this Supplemental License Agreement conflict with terms in the Convoy Cluster Software License Agreement, the terms of this Supplemental License Agreement control.

DISCLAIMER OF WARRANTIES. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, MICROSOFT AND ITS SUPPLIERS PROVIDE TO YOU THE SOFTWARE, AND ANY (IF ANY) SUPPORT SERVICES RELATED TO THE SOFTWARE ("SUPPORT SERVICES") AS IS AND WITH ALL FAULTS; AND MICROSOFT AND ITS SUPPLIERS HEREBY DISCLAIM WITH RESPECT TO THE SOFTWARE AND SUPPORT SERVICES ALL WARRANTIES AND CONDITIONS, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) WARRANTIES OR CONDITIONS OF OR RELATED TO: TITLE, NON-INFRINGEMENT, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS OF RESPONSES, RESULTS, LACK OF NEGLIGENCE OR LACK OF WORKMANLIKE EFFORT, QUIET ENJOYMENT, QUIET POSSESSION, AND CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE AND ANY SUPPORT SERVICES REMAINS WITH YOU.

EXCLUSION OF INCIDENTAL, CONSEQUENTIAL AND CERTAIN OTHER DAMAGES. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL MICROSOFT OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, BUT NOT LIMITED TO, DAMAGES FOR: LOSS OF PROFITS, LOSS OF CONFIDENTIAL OR OTHER INFORMATION, BUSINESS INTERRUPTION, PERSONAL INJURY, LOSS OF PRIVACY, FAILURE TO MEET ANY DUTY (INCLUDING OF GOOD FAITH OR OF REASONABLE CARE), NEGLIGENCE, AND ANY OTHER PECUNIARY OR OTHER LOSS WHATSOEVER) ARISING OUT OF OR IN ANY WAY RELATED TO THE USE OF OR INABILITY TO USE THE SOFTWARE OR THE SUPPORT SERVICES, OR THE PROVISION OF OR FAILURE TO PROVIDE SUPPORT SERVICES, OR OTHERWISE UNDER OR IN CONNECTION WITH ANY PROVISION OF THESE SUPPLEMENTAL LICENSE TERMS, EVEN IN THE EVENT OF THE FAULT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, BREACH OF CONTRACT OR BREACH OF WARRANTY OF MICROSOFT OR ANY SUPPLIER, AND EVEN IF MICROSOFT OR ANY SUPPLIER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

LIMITATION OF LIABILITY AND REMEDIES. NOTWITHSTANDING ANY DAMAGES THAT YOU MIGHT INCUR FOR ANY REASON WHATSOEVER (INCLUDING, WITHOUT LIMITATION, ALL DAMAGES REFERENCED ABOVE AND ALL DIRECT OR GENERAL DAMAGES), THE ENTIRE LIABILITY OF MICROSOFT AND ANY OF ITS SUPPLIERS UNDER ANY PROVISION OF THIS SUPPLEMENTAL LICENSE AGREEMENT AND YOUR EXCLUSIVE REMEDY FOR ALL OF THE FOREGOING SHALL BE LIMITED TO THE GREATER OF THE AMOUNT ACTUALLY PAID BY YOU FOR THE SOFTWARE OR U.S.$5.00. THE FOREGOING LIMITATIONS, EXCLUSIONS AND DISCLAIMERS SHALL APPLY TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, EVEN IF ANY REMEDY FAILS ITS ESSENTIAL PURPOSE.

If you accept the terms of the license agreement above:

Click here to access wlbs22i.exe

Click here to access wlbs22a.exe

System Requirements

  • Two or more x86 or Alpha systems with valid Microsoft Windows NT Server 4.0, Enterprise Edition licenses.

  • Windows® TCP/IP protocol must be installed.

  • At least one NIC per server must be installed.

  • FDDI or Ethernet-based LAN (WLBS is compatible with 10 megabits per second [Mbps], 100 Mbps, and gigabit Ethernet).

WLBS consumes less than 1 megabyte (MB) of storage space and occupies between 250 kilobytes (KB) and 4 MB of RAM during operation, using the default parameters and depending on the network load. The parameters can be modified to allow up to 15 MB memory to be used. Typical memory usage ranges between 500 KB and 1 MB.

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