Symptoms

Consider the following scenario:

  • You have a Windows Embedded Compact 7-based device that connects to a network.

  • The device is assigned a valid IP address by a Dynamic Host Configuration Protocol (DHCP) server. The DHCP server is configured not to send its default gateway.

  • You disconnect the device from the network and then reconnect the device to the same network.


In this scenario, the device sends a DHCP discovery message instead of a DHCP request message to the DHCP server. Additionally, a full DORA (Discovery, Offer, Request, Acknowledgment) DHCP process occurs.

Cause

This issue occurs because the device tries to ping the default gateway when it reconnects to the network. When the default gateway is not configured on the subnet or is inaccessible, the device responds as if the subnet is changed and therefore forces the sending of a DHCP discovery message.

Resolution

Software update information

A supported software update is now available from Microsoft as Windows Embedded Compact 7 Monthly Update (April 2012). In the "File information" section, the package file name contains the processor type.

Note This Windows Embedded Compact 7 Monthly Update is available for download from the following Microsoft Download Center website:

Windows Embedded Compact 7 Updates

Prerequisites

This update is supported only if all previously issued updates for this product have also been installed.

Restart requirement

After you apply this update, you must perform a clean build of the whole platform. To do this, use one of the following methods:

  • On the Build menu, click Clean Solution, and then click Build Solution.

  • On the Build menu, click Rebuild Solution.

You do not have to restart the computer after you apply this software update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this software update package 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 item in Control Panel.

Files that are included in this update package

File name

File size

Date

Time

Path

Dhcp.dll

118,784

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Checked

Dhcp.map

110,146

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Checked

Dhcp.rel

38,656

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Checked

Dhcp.dll

167,936

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Debug

Dhcp.map

114,176

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Debug

Dhcp.rel

39,381

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Debug

Dhcp.dll

53,248

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Retail

Dhcp.map

40,780

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Retail

Dhcp.rel

14,238

03-Apr-2012

17:43

Public\Common\Oak\Target\Armv5\Retail

Dhcp.dll

118,784

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Checked

Dhcp.map

110,146

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Checked

Dhcp.rel

38,656

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Checked

Dhcp.dll

167,936

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Debug

Dhcp.map

114,176

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Debug

Dhcp.rel

39,381

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Debug

Dhcp.dll

53,248

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Retail

Dhcp.map

40,780

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Retail

Dhcp.rel

14,238

03-Apr-2012

17:45

Public\Common\Oak\Target\Armv6\Retail

Dhcp.dll

114,688

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Checked

Dhcp.map

110,063

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Checked

Dhcp.rel

38,627

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Checked

Dhcp.dll

167,936

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Debug

Dhcp.map

114,176

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Debug

Dhcp.rel

39,381

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Debug

Dhcp.dll

53,248

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Retail

Dhcp.map

40,780

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Retail

Dhcp.rel

14,238

03-Apr-2012

17:46

Public\Common\Oak\Target\Armv7\Retail

Dhcp.dll

143,360

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Checked

Dhcp.map

107,860

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Checked

Dhcp.rel

126,990

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Checked

Dhcp.dll

188,416

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Debug

Dhcp.map

111,639

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Debug

Dhcp.rel

154,221

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Debug

Dhcp.dll

61,440

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Retail

Dhcp.map

38,649

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Retail

Dhcp.rel

50,082

03-Apr-2012

17:47

Public\Common\Oak\Target\Mipsii\Retail

Dhcp.dll

143,360

03-Apr-2012

17:49

Public\Common\Oak\Target\Mipsii_fp\Checked

Dhcp.map

107,860

03-Apr-2012

17:49

Public\Common\Oak\Target\Mipsii_fp\Checked

Dhcp.rel

126,990

03-Apr-2012

17:49

Public\Common\Oak\Target\Mipsii_fp\Checked

Dhcp.dll

188,416

03-Apr-2012

17:48

Public\Common\Oak\Target\Mipsii_fp\Debug

Dhcp.map

111,639

03-Apr-2012

17:48

Public\Common\Oak\Target\Mipsii_fp\Debug

Dhcp.rel

154,221

03-Apr-2012

17:48

Public\Common\Oak\Target\Mipsii_fp\Debug

Dhcp.dll

61,440

03-Apr-2012

17:48

Public\Common\Oak\Target\Mipsii_fp\Retail

Dhcp.map

38,649

03-Apr-2012

17:48

Public\Common\Oak\Target\Mipsii_fp\Retail

Dhcp.rel

50,082

03-Apr-2012

17:48

Public\Common\Oak\Target\Mipsii_fp\Retail

Dhcp.dll

110,592

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Checked

Dhcp.map

110,651

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Checked

Dhcp.rel

61,943

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Checked

Dhcp.dll

143,360

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Debug

Dhcp.map

114,101

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Debug

Dhcp.rel

69,512

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Debug

Dhcp.dll

49,152

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Retail

Dhcp.map

41,385

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Retail

Dhcp.rel

28,767

03-Apr-2012

17:50

Public\Common\Oak\Target\Sh4\Retail

Dhcp.dll

94,208

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Checked

Dhcp.map

107,525

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Checked

Dhcp.rel

34,770

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Checked

Dhcp.dll

126,976

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Debug

Dhcp.map

111,364

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Debug

Dhcp.rel

40,135

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Debug

Dhcp.dll

40,960

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Retail

Dhcp.map

38,693

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Retail

Dhcp.rel

11,019

03-Apr-2012

17:51

Public\Common\Oak\Target\X86\Retail

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