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Disabling IPv6 prevents creation of new HOMEGROUP

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Disabling IPv6 prevents creation of new HOMEGROUP

Postby guest » Tue Feb 03, 2009 1:15 pm

Hello All

IPv6 protocol installed by Windows 7 beta to network adaptor, can cause some problems with network connectivity if is used router that does not support IPv6 or have problems working if IPv6 protocol is enabled.

You can disable IPv6 protocol to escape from these problems, but you must know, that disabling IPv6 protocol on windows 7 beta, prevents you from creating of home groups.

If you leave home group for some reason and then you want to create new home group but IPv6 protocol is disabled, windows give you some message that says you need to set you network type to Home Network in order to create Home Group, and creation process of New Home Group breaks on this point.
When you open Network and Sharing Center to set your network type to Home Network, you see that it is already set to Home Network.

So if you want to create new Home Group you must open Network Adapter properties and to re enable IPv6 support.
After IPv6 support is enabled you will be able to create new Home Group.

After ctreation process of home group finish you can dissable IPv6 support again, but you must know that this may brigs to you new unexpected problems like that I described here.


Windows 7 troubleshooter tool, detects that you are not loged in home group, but cannot fix it
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Postby guest » Tue Feb 03, 2009 1:15 pm

Although it is common practice for "experts" to recommend disabling IPv6 in Vista and now Windows 7 I find that in very few cases does IPv6 cause problems. The problems with older networking hardware are usually caused by other features like TCP Auto-tuning, Receive-Side Scaling, and TCP Offload. If you have a problem with some old hardware I recommend leaving IPv6 enabled and try various settings for the other features. Usually this will fix the problem. I only try disabling IPv6 when the changing the other settings doesn't work. So far I have not found one case where disabling IPv6 on it's own fixed anything.


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Postby guest » Tue Feb 03, 2009 1:15 pm

There is an article in Germany's c't computer magazine describing the new networking implementation in Windows 7. MS uses a new method for name resolving, called "Peer Name Resolution Protocol" (PNRP). PNRP is based on IPv6 and HomeGroups are based on PNRP. If you disable IPv6, you will loose HomeGroups, as Mr. Alexandriyski already mentioned.
So there will be no fix for this. "It's not a bug, it's by design"

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