Some very nice broken IPv6 networks at Google and Akamai

Roger Jørgensen roger at
Wed Nov 12 10:41:46 CET 2014

On Sun, 9 Nov 2014 11:10:31 -1000, Lorenzo Colitti wrote:
> On Sat, Nov 8, 2014 at 11:48 PM, Jeroen Massar <jeroen at> 
> wrote:
>> >> The issue with IPv6 access to Google should now be resolved.  
>> Please let
>> >> us know if you're still having problems.
>> The fun question of course is: what/why/how the heck happened?
> Another fun question is why folks are relying on PMTUD instead of 
> adjusting
> their MTU settings (e.g., via RAs). But relying on PMTUD still 
> imposes a
> 1-RTT penalty on every TCP connection to an IPv6 address you haven't 
> talked
> to in the last few minutes. Why would you do that to your connection?

hmmm almost like I feel for disabling IPv6 when using google, or just 
don't use it at all if that's how you look at IPv6.
(with regard to PMTUD issue)


Roger Jorgensen      | - ROJO9-RIPE
roger at   | - The Future is IPv6

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