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The functionality for source IP address selection in Windows Server 2008 and in Windows Vista differs from the corresponding functionality in earlier versions of Windows
Article ID: 969029 - View products that this article applies to.
Windows Server 2008 and Windows Vista have a new TCP/IP stack. When a single network interface has more than one IP address, the new stack selects the unicast address to use as the source IP address. This address selection functionality differs from the corresponding functionality in earlier versions of Windows.
Note Customers most frequently encounter problems when the following conditions are true:
Windows 2008 and Windows Vista follow RFC 3484 for IP V6 source address selection. Because this RFC is written primarily for IPV6, not all the rules in this RFC can be directly applied to IP V4 source address selection. The following rules are followed for IPV4 source address selection only when the application does not specify the source IP address. These rules apply for a particular destination address. If either the destination IP address or the default gateway changes, the source IP address may also change.
For more information about IP addressing, visit the following Microsoft Web site:
http://technet.microsoft.com/en-us/library/bb726995.aspxFor more information about RFC 3484, visit the following Network Working Group Web site:
Article ID: 969029 - Last Review: March 20, 2009 - Revision: 1.1