[97656] in North American Network Operators' Group

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Re: trans-Atlantic latency?

daemon@ATHENA.MIT.EDU (Iljitsch van Beijnum)
Thu Jun 28 20:01:10 2007

In-Reply-To: <4684423F.5070303@lists.rauhauser.net>
Cc: nanog@merit.edu
From: Iljitsch van Beijnum <iljitsch@muada.com>
Date: Fri, 29 Jun 2007 01:51:47 +0200
To: Neal R <neal@lists.rauhauser.net>
Errors-To: owner-nanog@merit.edu


On 29-jun-2007, at 1:20, Neal R wrote:

>     What is a reasonable latency to see on a link of that distance?

You'll want to ask whether this is one-way latency or round trip time.

I'm seeing this from Amsterdam:

  6  51.ae0.cr2.iad1.us.scnet.net (216.246.102.94)  82.686 ms  82.762  
ms  82.808 ms
  7  15.xe-1-2-0.cr1.ord1.us.scnet.net (216.246.36.246)  100.792 ms   
100.830 ms  100.798 ms
  8  v53.ar2.ord1.us.scnet.net (216.246.95.138)  101.051 ms  101.087  
ms  101.042 ms
  9  v223.aggr223.ord1.us.scnet.net (216.246.94.30)  101.301 ms   
101.318 ms  101.423 ms

I don't think you're going to do significantly better than this, I'd  
be amazed if anyone can do London - Chicago below 90 ms round trip.


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