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Windows Vista Client releases its DHCP Lease during reboot unexpectedly

If you reboot a Windows Vista DHCP Client during a timeframe when the DHCP Server is unavailable, the client will configure its IP address to, even thougth you have set the registry value DontPingGateway to 1 as decribed in KB958336. 
This only happens if you have set the registry value IpAutoConfigurationEnabled to 0 with the intention of disabling APIPA functionality.

This is a known issue in the listed products.
Enable APIPA again by setting the registry value IPAutoconfigurationEnabled to 1 as described in KB220874. Another option is to delete the IPAutoconfigurationEnabled value from the registry, as it defaults to 1 if it is not present in the registry.

You can set the registry value DontPingGateway to 1 as decribed in KB958336 if you want the client to retain its DHCP lease even if a DHCP Server is not available. Enabling APIPA will not have any negative impact, because APIPA for Windows-based DHCP clients is intended to automatically assign an Internet Protocol (IP) address if a DHCP server is not available. 
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 2276930 - Last Review: 08/24/2010 21:35:00 - Revision: 1.0

Windows Vista Enterprise 64-bit Edition, Windows Vista Home Basic 64-bit Edition, Windows Vista Home Premium 64-bit Edition, Windows Vista Ultimate 64-bit Edition, Windows Vista Business, Windows Vista Business 64-bit Edition, Windows Vista Business N, Windows Vista Business N 64-bit Edition, Windows Vista Enterprise, Windows Vista Home Basic, Windows Vista Home Basic Beta, Windows Vista Home Basic N, Windows Vista Home Basic N 64-bit Edition, Windows Vista Home Premium, Windows Vista Home Premium Beta, Windows Vista Ultimate Beta, Windows Vista Service Pack 1, Windows Vista Service Pack 2, Windows Vista Starter, Windows Vista Ultimate

  • KB2276930