Yesterday's Windows update causes IPv4 to be default

[Mikael Abrahamsson]

On Wed, 14 Nov 2012, Dick Visser wrote:

> Anyone else has seen IPv6 issues on Windows since yesterday?

"An IPv6 readiness update is available for Windows 7 and for Windows 
Server 2008 R2".

http://support.microsoft.com/kb/2750841

It seems to address 6to4 mainly, but it has some "broken IPv6 
connectivity" as well.

Anyhow, after installing it on my 64bit Win7 Home Premium, I don't see any 
of your issues. As far as I can tell, it thinks my IPv6 works fine and 
uses it just like before.

I have a /48 tunneled to my home out of our regular PA IPv6 block, and I 
set IPv6 MTU to 1400 on my home lan (to avoid PMTUD RTT delays).

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se