Q114638: Only 60 Clients Can Simultaneously Access a TCP/IP Share

Article: Q114638
Product(s): Microsoft Windows NT
Version(s): 3.1
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 30-JUL-2001

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The information in this article applies to:

- 
   - Microsoft Windows NT Server version 3.1 
   - Microsoft Windows NT Workstation version 3.1 
- Microsoft Windows NT Advanced Server, version 3.1 
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SYMPTOMS
========

Only 60 clients can simultaneously access a Windows NT Advanced Server shared
resource over TCP/IP.

CAUSE
=====

The default ARP cache is set to 62.

RESOLUTION
==========

To avoid this problem, modify the setting for the ARP cache. You can use
Registry Editor to change this setting in the following key:

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

Create a value called ArpCacheSize and set it to 250.

WARNING: Using Registry Editor incorrectly can cause serious, system-wide
problems that may require you to reinstall Windows NT to correct them. Microsoft
cannot guarantee that any problems resulting from the use of Registry Editor can
be resolved. Use this tool at your own risk.

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT and Windows NT
Advanced Server version 3.1. This problem has been corrected in the latest U.S.
Service Pack for Windows NT and Windows NT Advanced Server version 3.1. For
information on obtaining the Service Pack, query on the following word in the
Microsoft Knowledge Base (without the spaces):

  S E R V P A C K

Additional query words: prodnt

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Keywords          : kbnetwork 
Version           : 3.1

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