Microsoft KB Archive/188655

= NetBIOS CacheTimeout Explanation =

Article ID: 188655

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition

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This article was previously published under Q188655



IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information on how to do this, view the "Restoring the Registry" online Help topic in Regedit.exe or the "Restoring a Registry Key" online Help topic in Regedt32.exe.



SYMPTOMS
There is an error in the documentation of the NetBIOS cachetimout registry entry. In both the TCP/IP Implementation Details Version 2.0 white paper and the Windows NT Resource Kit, the low end of the valid range is documented as being in decimal and the high end of the range is documented in hex, as seen below:

  CacheTimeout Key: Netbt\Parameters Value Type: REG_DWORD - Time in milliseconds Valid Range: 60000 to 0xFFFFFFFF Default: 0x927c0 ( 600000 milliseconds = 10 minutes)

Description: This value determines the time interval that names are cached in the remote name table.



RESOLUTION
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" online Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" online Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

The correct entry should look like:

  CacheTimeout Key: Netbt\Parameters Value Type: REG_DWORD - Time in milliseconds Valid Range: 0xEA60 to 0xFFFFFFFF Default: 0x927c0 ( 600000 milliseconds = 10 minutes)

Description: This value determines the time interval that names are cached in the remote name table.

Additional query words: cache kbDSupport

Keywords: kbprb KB188655

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