When a DHCP server is unavailable on a Windows Vista-based computer, Windows Vista uses an APIPA IP address much sooner than Windows XP does under the same circumstances

When a DHCP server is unavailable on a Windows Vista-based computer, Windows Vista uses an APIPA IP address much sooner than Windows XP does under the same circumstances

Article ID : 931550
Last Review : March 15, 2007
Revision : 1.2

SYMPTOMS

When you start a Windows Vista-based computer, you may notice the following:

• The computer first uses an Automatic Private IP Addressing (APIPA) IP address.
• Later, the computer acquires an IP address from a Dynamic Host Configuration Protocol (DHCP) server.

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CAUSE

This behavior occurs if Windows Vista cannot immediately contact a DHCP server. In this situation, Windows Vista tries for only six seconds to contact a DHCP server and then uses an APIPA IP address. Then, Windows Vista continues trying to acquire an IP address from a DHCP server.

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MORE INFORMATION

This behavior differs from earlier versions of Windows. For example, when you start a Microsoft Windows XP-based computer, Windows XP tries for a full three minutes to contact a DHCP server before it uses an APIPA IP address.

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APPLIES TO
• Windows Vista Ultimate
• Windows Vista Starter
• Windows Vista Home Premium
• Windows Vista Home Basic
• Windows Vista Enterprise
• Windows Vista Business 64-bit edition
• Windows Vista Business
• Windows Vista Ultimate 64-bit edition
• Windows Vista Home Premium 64-bit edition
• Windows Vista Home Basic 64-bit edition
• Windows Vista Enterprise 64-bit edition

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Keywords: 
kbinfo kbtshoot kbexpertiseinter KB931550

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Microsoft Knowledge Base Article

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