Microsoft KB Archive/913486

= DHCP no longer automatically renews the IP address of a Windows CE .NET 4.2-based device =

Article ID: 913486

Article Last Modified on 7/26/2006

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APPLIES TO


 * Microsoft Windows CE .NET 4.2

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SYMPTOMS
When you connect a Microsoft Windows CE .NET 4.2-based device over a wireless network, you may receive the following error message:

DHCP was unable to obtain an IP address. If the netcard is removable, then you can remove/reinsert it to have DHCP make another attempt to obtain an IP address for it. Otherwise, you can statically assign an address.

When the device disconnects from the wireless network, DHCP no longer automatically renews the IP address of the device. The device cannot reconnect to the wireless network.

Note Under certain conditions, the device no longer automatically obtains a new IP address. This problem occurs even after the connection to the wireless access point is restored.



CAUSE
This problem occurs when the network card informs the Dynamic Host Configuration Protocol (DHCP) protocol of a media disconnect. The sequence in which DHCP receives this notification makes it believe that the network adapter is no longer available. Therefore, DHCP no longer tries to obtain an IP address, even though the network adapter is functioning correctly.



Software update information
A supported software update is now available from Microsoft as Windows CE .NET 4.2 Core OS QFE 913486. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites
No prerequisites are required.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Update replacement information
This update does not replace any other updates.

File information
The English version of this package has the file attributes (or later file attributes) that are listed in the following table.

The English version of this software update has the file attributes (or later file attributes) 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.



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
This problem does not occur in Microsoft Windows CE 5.0.

Additional query words: WiFi WAP

Keywords: kbpubtypekc kbqfe kbbug kberrmsg kbfix KB913486

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