[98835] in North American Network Operators' Group
Re: Cogent latency / congestion
daemon@ATHENA.MIT.EDU (Kevin Oberman)
Mon Aug 20 17:14:34 2007
To: Mike Tancsa <mike@sentex.net>
Cc: Dan Armstrong <dan@beanfield.com>, nanog@merit.edu
In-Reply-To: Your message of "Mon, 20 Aug 2007 16:11:44 EDT."
<200708202011.l7KKB6fL024641@lava.sentex.ca>
Date: Mon, 20 Aug 2007 14:13:38 -0700
From: "Kevin Oberman" <oberman@es.net>
Errors-To: owner-nanog@merit.edu
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> Date: Mon, 20 Aug 2007 16:11:44 -0400
> From: Mike Tancsa <mike@sentex.net>
> Sender: owner-nanog@merit.edu
>
>
> At 03:54 PM 8/20/2007, Dan Armstrong wrote:
> >We're going crazy up here, I'm trying to nail down where exactly the
> >problem is - We don't use Cogent anywhere, but we're having terrible
> >problems with Bell and many sites in Europe...
>
> Bell uses Cogent in a large way. The second traceroute was from an IP
> in their AS (577) out. I am prepending out Cogent, but Bell does
> everything it can not to use Teleglobe so I am having problems
> influencing their routes to come back that way. They also have a
> very odd path out of Chicago. This is from a site in Toronto (source
> IP in AS577) back to me peering with Cogent's router in Toronto...
> Toronto, Chicago, Kansas, Texas, Washington, Boston, Albany,
> Toronto. Thats quite the milk run. Usually its Toronto, Chicago, Toronto.
>
Almost certainly the fiber cut of last night. Still down after >19
hours. Not a pretty picture for those lacking diversity between Chicago
and points east.
--
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751
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