[lacnog] Google DNS from South America

[Doug Madory]

Thanks Carlos.

This discovery came from our study of BGP anycasting presented at NANOG this week:

http://www.youtube.com/watch?v=wA9fCSFdAhE
http://www.renesys.com/wp-content/uploads/2013/10/NANOG59_Anycast.pdf

Doug Madory
603-643-9300 x115
Hanover, NH
"The Internet Intelligence Authority"

On Oct 11, 2013, at 1:47 PM, "Carlos M. Martinez" <carlosm3011 en gmail.com> wrote:

> I've configured a cacti ping probe on 8.8.8.8 and 8.8.4.4, just to see
> how it evolves. If I see something interesting from my vantage point (AS
> 28000), I'll post.
> 
> cheers!
> 
> ~Carlos
> 
> On 10/11/13 3:12 PM, Doug Madory wrote:
>> Here's a before/after to 8.8.8.8 from Rio. As with all of the cases in South America we have seen, the traceroute reaches Google's local network and then is re-routed internally back to the US. In the case below, the same Google IP in Brazil is traversed both before and after (209.85.254.136).
>> 
>> Before:
>> 
>> 0	x		-1	ms	
>> 1	x		4.181	ms	
>> 2	209.197.0.214	ve427.r1.mi.hwng.net	7.857	ms	Highwinds Network Group, Inc.
>> 3	187.16.218.58	as15169-s2.sp.ptt.br	9.057	ms	Núcleo de Inf. e Coord. do Ponto BR - NIC.BR
>> 4	209.85.254.136		9.699	ms	Google Inc.
>> 5	72.14.233.89		9.744	ms	Google Inc.
>> 6	64.233.175.18		9.906	ms	Google Inc.
>> 7	8.8.8.8	google-public-dns-a.google.com	10.283	ms	Google Incorporated
>> 
>> After:
>> 
>> 0	x		-1	ms	
>> 1	x		5.527	ms	
>> 2	209.197.0.214	ve427.r1.mi.hwng.net	17.72	ms	Highwinds Network Group, Inc.
>> 3	187.16.218.58	as15169-s2.sp.ptt.br	13.985	ms	Núcleo de Inf. e Coord. do Ponto BR - NIC.BR
>> 4	209.85.254.136		10.505	ms	Google Inc.
>> 5	72.14.236.174		20.456	ms	Google Inc.
>> 6	72.14.235.106		143.537	ms	Google Inc.
>> 7	209.85.252.96		178.19	ms	Google Inc.
>> 8	209.85.248.29		137.243	ms	Google Inc.
>> 9	8.8.8.8	google-public-dns-a.google.com	137.921	ms	Google Incorporated
>> 
>> Doug Madory
>> 603-643-9300 x115
>> Hanover, NH
>> "The Internet Intelligence Authority"
>> 
>> On Oct 10, 2013, at 2:28 PM, Doug Madory <dmadory en renesys.com> wrote:
>> 
>>> We're not seeing this happen Mexico.
>>> 
>>> I'll grab a couple before and after traceroutes from our data. In each case, the traceroute gets to the local Google presence before it is directed back to the US instead of hitting a local server as it did previously.
>>> 
>>> Doug Madory
>>> 603-643-9300 x115
>>> Hanover, NH
>>> "The Internet Intelligence Authority"
>>> 
>>> On Oct 10, 2013, at 1:05 PM, Octavio Alvarez <alvarezp en alvarezp.ods.org> wrote:
>>> 
>>>> On 10/10/2013 08:14 AM, Doug Madory wrote:
>>>>> We have noticed a change in the latencies to Google's public DNS services (8.8.8.8 and 8.8.4.4) coming from locations in South America starting mid-September:
>>>>> 
>>>>> http://www.renesys.com/2013/10/internet-paths-matter-performance/
>>>>> 
>>>>> Have any of the members of the LACNOC community noticed this change?
>>>> 
>>>> In Tijuana, Mexico I see it ok. Can you post a traceroute to it (or
>>>> better, an mtr)?
>>>> 
>>> 
>> 
>> 
>> 
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