Empfohlenes Update Version: KB2750841
An IPv6 readiness update is availableThis article introduces the IPv6 readiness update for Windows 7 and for Windows Server 2008 R2.
This update improves the performance when you migrate from an IPv4 environment to an IPv6 environment.
Issues that are fixed in this update
Note: The expected behavior is that Windows clients do not assign 6to4 addresses unless the connection is confirmed.
This update enables Windows to check whether the relay can be reached before Windows adds a route to it. Windows deletes the route if the connection to the relay is unavailable. This behavior prevents Windows from trying to connect to an IPv6 address that cannot be reached through the relay.
Note: The relay is the 6to4 public route that the 6to4 packet uses to reach its destination.
This update limits the number of advertised prefixes and routes that each interface can process to 100.
Note: Because of recommendations in the RFC 6343 document, you cannot disable 6to4 sharing.
After this update is installed, the automatic Connection Sharing 6to4 sharing functionality in Windows is disabled by default.
This issue occurs because Windows tries the IPv6 connection first. After the connection fails because of a time-out error, Windows tries the IPv4 connection.
After this update is installed, Windows uses the NCSI functionality to examine the Ipv6 connection. If the connection is broken, Windows uses IPv4 instead of IPv6.
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