On Thu, 2011-06-09 at 11:17 +0100, Tim Chown wrote:
> On 9 Jun 2011, at 10:22, Phil Mayers wrote:
> > Actually, scratch that. The traffic we're still getting seems to be
> Google/Youtube. There's no AAAA now, so obviously some clients have
> hung onto the cached record for rather longer than they should.
> MacOS X caching behaviour turned out to be very interesting. I posted
> something about that yesterday, but it seems to be deeper than that.
> It's as if OS X will just ignore AAAA responses if they don't come
> back quickly enough, and thus you 'lock' into IPv4 if the A response
> arrives quickly. I need to rig up some tests, but if anyone has
> looked in detail at that already and has the info, it would be
> appreciated.
Not done anything on it personally, but sounds like a known bug:
http://thread.gmane.org/gmane.org.operators.ipv6/3682
http://openradar.appspot.com/7333104
--
Robert Kerr
|