[c-nsp] transatlantic Internet latency

[Adam Greene]

Hi all,

thanks for your replies to my question. Yes, it seems pretty obvious that
the fiber is trans-pacific. Duh. I appreciate the analyses some of you sent.
We don't do much international work, as you can tell ....

---Adam


----- Original Message ----- 
From: "Lyle Evans" <mlevans at blacksburg.net>
To: <cisco-nsp at puck.nether.net>
Sent: Friday, July 29, 2005 7:50 PM
Subject: Re: [c-nsp] transatlantic Internet latency


> At 05:00 PM 07/29/2005 -0400, you wrote:
> >Hi,
> >
> >We have a customer who's experiencing high latency on IP traffic between
New
> >York (where we are) and their server in New Zealand. As far as I can
tell,
> >this is normal behavior.
>
> The great circle distance between NY and Auckland is 8816 miles (14189
Km),
> the round trip distance is twice the above numbers and the speed of
> propagation of light in fiber is about 2/3 of that in a vacuum,
> which yields a minimum of 141 ms due light travel time. I will bet that
> the actual route path is no where near a straight line (great circle).
> maybe as much as 50% longer that brings you to about 210 ms,
> in other words its physics for about 210 ms of delay.
>
>
> Lyle Evans
> lyle at rackears.com
> rackmount brackets for many network
> http://www.rackears.com
>
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