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

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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.

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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.

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RESOLUTION

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 (http://support.microsoft.com/kb/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.

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File name	File size	Date	Time
Wincepb42-060120-kb913486-armv4.msi	7,641,600	21-Jan-2006	00:25
Wincepb42-060120-kb913486-armv4i.msi	7,641,600	21-Jan-2006	00:26
Wincepb42-060120-kb913486-mipsii.msi	7,649,792	21-Jan-2006	00:26
Wincepb42-060120-kb913486-mipsii_fp.msi	7,649,792	21-Jan-2006	00:26
Wincepb42-060120-kb913486-mipsiv.msi	7,652,864	21-Jan-2006	00:26
Wincepb42-060120-kb913486-mipsiv_fp.msi	7,652,864	21-Jan-2006	00:26
Wincepb42-060120-kb913486-sh3.msi	7,631,872	21-Jan-2006	00:25
Wincepb42-060120-kb913486-sh4.msi	7,631,872	21-Jan-2006	00:25
Wincepb42-060120-kb913486-x86.msi	7,618,560	21-Jan-2006	00:25

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.

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File name	File size	Date	Time	Path
Dhcp.lib	340,522	18-Jan-2006	19:31	public\common\oak\lib\armv4\debug
Dhcp.lib	195,158	18-Jan-2006	19:31	public\common\oak\lib\armv4\retail
Dhcp.lib	340,920	18-Jan-2006	19:31	public\common\oak\lib\armv4i\debug
Dhcp.lib	195,624	18-Jan-2006	19:31	public\common\oak\lib\armv4i\retail
Dhcp.lib	348,136	18-Jan-2006	19:32	public\common\oak\lib\mipsii\debug
Dhcp.lib	201,796	18-Jan-2006	19:32	public\common\oak\lib\mipsii\retail
Dhcp.lib	348,158	18-Jan-2006	19:32	public\common\oak\lib\mipsii_fp\debug
Dhcp.lib	201,834	18-Jan-2006	19:32	public\common\oak\lib\mipsii_fp\retail
Dhcp.lib	351,876	18-Jan-2006	19:32	public\common\oak\lib\mipsiv\debug
Dhcp.lib	204,430	18-Jan-2006	19:32	public\common\oak\lib\mipsiv\retail
Dhcp.lib	351,898	18-Jan-2006	19:32	public\common\oak\lib\mipsiv_fp\debug
Dhcp.lib	204,472	18-Jan-2006	19:32	public\common\oak\lib\mipsiv_fp\retail
Dhcp.lib	311,510	18-Jan-2006	19:32	public\common\oak\lib\sh3\debug
Dhcp.lib	185,426	18-Jan-2006	19:32	public\common\oak\lib\sh3\retail
Dhcp.lib	311,410	18-Jan-2006	19:32	public\common\oak\lib\sh4\debug
Dhcp.lib	185,132	18-Jan-2006	19:32	public\common\oak\lib\sh4\retail
Dhcp.lib	307,600	18-Jan-2006	19:31	public\common\oak\lib\x86\debug
Dhcp.lib	170,580	18-Jan-2006	19:31	public\common\oak\lib\x86\retail