All implementations of Teredo in Windows are based on RFC 4380. To use Teredo functionality in Windows XP Service Pack 2 or Windows Server 2003 Service Pack 1, see the “Using Teredo in Windows XP Service Pack 2” section of this article. For information about changes to Teredo for Windows Vista and Windows Server "Longhorn," see Changes to IPv6 in Windows Vista and Windows Server "Longhorn". Note:
