Microsoft KB Archive/840670

= You cannot reestablish a connection through an ATM network adaptor in Windows 2000 =

Article ID: 840670

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
When two Microsoft Windows 2000 Server-based computers are connected over PVCs by using ATM network adapters and an ATM switch, one of the ATM network adapters may stop transmitting. You cannot reestablish a connection from the server that stopped transmitting to the second server. However, you can establish a connection from the second server to the problem server.



CAUSE
This problem occurs because the Address Resolution Protocol (ARP) cache entry for the second server expires on the problem server when the ATM network adapter is inactive for 15 minutes. Therefore, the ARP cache on the problem server does not have the media access control (MAC) address of the second server, and the problem server cannot reestablish a connection.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
No prerequisites are required.

Restart Requirement
You must restart your computer after you apply this hotfix.

Hotfix Replacement Information
This hotfix does not replace any other hotfixes.

File Information
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. Date        Time   Version        Size    File name -- 29-Apr-2004 23:02  5.0.2195.6927  58,000  Atmarpc.sys



WORKAROUND
To work around this problem, turn off and then turn on the ATM network adapter on the problem server. To do this, follow these steps:
 * 1) On the desktop, right-click My Computer, and then click Properties.
 * 2) Click the Hardware tab, and then click Device Manager.
 * 3) Expand Network adapters, right-click the ATM network adapter entry, and then click Disable.
 * 4) When you receive the Disabling this device will cause it to stop functioning. Do you really want to disable it? message, click Yes.
 * 5) In Device Manager, right-click the ATM network adapter entry, and then click Enable.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New naming schema for Microsoft Windows hotfix packages

For additional information about Microsoft software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbqfe kbhotfixserver kbbug kbfix kbwin2000presp5fix KB840670

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