Microsoft KB Archive/817690

= When You Disconnect and Reconnect Your Primary Network Adapter, the Secondary Adapter No Longer Works =

Article ID: 817690

Article Last Modified on 7/24/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition

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SYMPTOMS
If you have two network adapters on your computer and both have persistent network connections, and then you disconnect the primary network adapter to permit the network to enable the secondary route as the primary route, you may experience problems. Specifically, when you reconnect the primary connection, you cannot connect through the secondary network adapter.



CAUSE
This issue occurs when you have two static IP addresses with the same IP destination and mask. When you disconnect the primary network adapter, both the primary route to the primary network adapter and the associated route to the secondary network adapter are removed from the Routing table. The network then creates a new primary route to the secondary network adapter. When you reconnect the primary network adapter, the network removes the route to the secondary network adapter, and then it re-creates the route to the primary network adapter. However, because both network adapters share the same IP destination and mask, only the primary route is created. The associated route to the secondary network adapter is not created.



Hotfix Information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

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

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 fix 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 --  31-Mar-2003  18:17  5.2.3790.2        299,008  Tcpip.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Additional query words: Win2003 NIC card cable

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe kbwinserv2003presp1fix KB817690

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