Cogent & Google IPv6

Patrick W. Gilmore patrick at ianai.net
Wed Feb 24 20:04:02 UTC 2016


To answer Matt’s question, NO.

Assume Cogent peers with NTT. Assume Google peers with NTT. NTT has very good v6 connectivity (not an assumption).

Cogent cannot send a packet to NTT and say “please hand this to Google”. Nor can Google hand a packet to NTT with a destination of Cogent.

Under this scenario, NTT is not being paid by Cogent or Google. Why would they take a packet from one and give it to the other?

-- 
TTFN,
patrick

> On Feb 24, 2016, at 2:53 PM, Max Tulyev <maxtul at netassist.ua> wrote:
> 
> If you connected to Internet ONLY through Cogent - there is no other
> way. If you have another upstreams - Google should be reachable.
> 
> On 24.02.16 21:46, Matt Hoppes wrote:
>> Correct me if I'm wrong, but if Cogent isn't peering with Google IPv6,
>> shouldn't the traffic flow out to one of their peer points where another
>> peer DOES peer with Google IPv6 and get you in?
>> 
>> Isn't that how the Internet is suppose to work?
>> 
>> 
>> On 2/24/16 2:43 PM, Damien Burke wrote:
>>> Not sure. I got the same thing today as well.
>>> 
>>> Is this some kind of ipv6 war?
>>> 
>>> -----Original Message-----
>>> From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Ian Clark
>>> Sent: Wednesday, February 24, 2016 10:25 AM
>>> To: NANOG
>>> Subject: Cogent & Google IPv6
>>> 
>>> Anyone know what's actually going on here?  We received the following
>>> information from the two of them, and this just started a week or so ago.
>>> 
>>> 
>>> *From Cogent, the transit provider for a branch office of ours:*
>>> 
>>> Dear Cogent Customer,
>>> 
>>> Thank you for contacting Cogent Customer Support for information about
>>> the Google IPv6 addresses you are unable to reach.
>>> 
>>> Google uses transit providers to announce their IPv4 routes to Cogent.
>>> 
>>> At this time however, Google has chosen not to announce their IPv6
>>> routes to Cogent through transit providers.
>>> 
>>> We apologize for any inconvenience this may cause you and will notify
>>> you if there is an update to the situation.
>>> 
>>> 
>>> 
>>> *From Google (re: Cogent):*
>>> 
>>> Unfortunately it seems that your transit provider does not have IPv6
>>> connectivity with Google. We suggest you ask your transit provider to
>>> look for alternatives to interconnect with us.
>>> 
>>> Google maintains an open interconnect policy for IPv6 and welcomes any
>>> network to peer with us for access via IPv6 (and IPv4). For those
>>> networks that aren't able, or chose not to peer with Google via IPv6,
>>> they are able to reach us through any of a large number of transit
>>> providers.
>>> 
>>> For more information in how to peer directly with Google please visit
>>> https://peering.google.com
>>> 
>>> 
>>> -- 
>>> Ian Clark
>>> Lead Network Engineer
>>> DreamHost
>>> 
>> 



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