Yesterday's Windows update causes IPv4 to be default

Lorenzo Colitti lorenzo at
Wed Nov 21 02:21:52 CET 2012

On Wed, Nov 21, 2012 at 9:56 AM, Doug Barton <dougb at> wrote:

> I'm curious about why MS chose not to simply implement the Happy Eyeballs
> protocol?

HE has drawbacks, such as additional server connection load, tendency to
prefer IPv4 more than necessary (just look at Apple's implementation, which
prefers IPv4 most of the time), and tendency to mask IPv6 connectivity

MS's implementation fixes the "pathologically broken IPv6" case, which is
the one that really needs to be fixed, while preferring IPv6 all the time
everywhere else. I think that's a good tradeoff.
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