Select the product you need help with
- Internet Explorer
- Windows Phone
- More products
A computer loses its DHCP IP address if a DHCP server is not available in Windows 7 or Windows Vista
Article ID: 958336 - View products that this article applies to.
Support for Windows Vista Service Pack 1 (SP1) ended on July 12, 2011. To continue receiving security updates for Windows Vista, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft website: Support is ending for some versions of Windows
Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
Consider the following scenario:
In this scenario, the computer loses the IP address that was assigned to it by the DHCP server. This occurs even if the default gateway is available. Instead, an Automatic Private IP Addressing (APIPA) address, such as 169.254.0.1, is assigned to the client computer. Or, if the adapter was assigned an IP address by using the Alternative Configuration tab for the adapter, the adapter will use that address.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve this issue, add a registry value to force the client to keep its DHCP IP address, even if a DHCP server is not available. To add this value, follow these steps:
Note In Windows 7, the new registry value is not obeyed if you try to set it for a specific adapter in the following subkey:
Article ID: 958336 - Last Review: February 26, 2013 - Revision: 3.0