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Re: trans-Atlantic latency?

  • From: Peter Dambier
  • Date: Fri Jun 29 05:47:05 2007


Neal R wrote:

I have a customer with IP transport from Sprint and McLeod and fiber connectivity to Sprint in the Chicago area. The person making the decisions is not a routing guy but is very sharp overall. He is currently examining the latency on trans-Atlantic links and has fixed on the idea that he needs 40ms or less to London through whatever carrier he picks. He has spoken to someone at Cogent about a point to point link.


What is a reasonable latency to see on a link of that distance? I get the impression he is shopping for something that involves dilithium crystal powered negative latency inducers, wormhole technology, or an ethernet to tachyon bridge, but its been a long time (9/14/2001, to be exact) since I've had a trans-Atlantic circuit under my care and things were different back then.


Anyone care to enlighten me on what these guys can reasonably expect on such a link? My best guess is he'd like service from Colt based on the type of customer he is trying to reach, but its a big muddle and I don't get to talk to all of the players ...

I remember voiping over the pond, from Frankfurt, germany to New York.


We had to twist asterisk to even accept the sip. Time was between
80 and 90 msec. The experienced time was higher. Roger, Over and Out
with their interstallar hamradio experience could do it, but to a
normal citizen it was unuseble.

(dsl 1000 customer, close to Frankfurt)

 1  krzach.peter-dambier.de (192.168.48.2)  2.918 ms   3.599 ms   3.926 ms
 2  * * *
 3  217.0.78.58  85.268 ms   85.301 ms   102.059 ms
 4  f-ea1.F.DE.net.DTAG.DE (62.154.18.22)  102.092 ms   110.057 ms   126.310 ms
 5  p2-0.core01.fra01.atlas.cogentco.com (212.20.159.38)  126.344 ms * *
 6  * * *
 7  p3-0.core01.ams03.atlas.cogentco.com (130.117.0.145)  132.262 ms   139.333 ms   147.174 ms
 8  p12-0.core01.lon01.atlas.cogentco.com (130.117.0.198)  76.436 ms   76.444 ms   84.374 ms
 9  t1-4.mpd02.lon01.atlas.cogentco.com (130.117.1.74)  99.840 ms   99.873 ms   107.508 ms
10  t3-2.mpd01.bos01.atlas.cogentco.com (130.117.0.185)  209.678 ms   217.428 ms   225.601 ms
11  t2-4.mpd01.ord01.atlas.cogentco.com (154.54.6.22)  233.514 ms * *
12  vl3491.mpd01.ord03.atlas.cogentco.com (154.54.6.210)  243.741 ms * *
13  * * *
14  ge-1-3-0x24.aa1.mich.net (198.108.23.241)  165.776 ms   174.752 ms   193.770 ms
15  www.merit.edu (198.108.1.92)(H!)  193.812 ms (H!)  201.863 ms (H!)  209.704 ms

(colo in Amsterdam)

 1  205.189.71.253 (205.189.71.253)  0.227 ms  0.257 ms  0.227 ms
 2  ge-5-2-234.ipcolo1.Amsterdam1.Level3.net (212.72.46.165)  0.985 ms  0.811 ms  0.856 ms
 3  ae-32-54.ebr2.Amsterdam1.Level3.net (4.68.120.126)  4.235 ms  6.575 ms  1.360 ms
 4  ae-2.ebr2.London1.Level3.net (4.69.132.133)  19.097 ms  12.816 ms  18.220 ms
 5  ae-4.ebr1.NewYork1.Level3.net (4.69.132.109)  78.197 ms  78.769 ms  87.062 ms
 6  ae-71-71.csw2.NewYork1.Level3.net (4.69.134.70)  78.068 ms  79.058 ms  89.192 ms
 7  ae-22-79.car2.NewYork1.Level3.net (4.68.16.68)  142.665 ms  135.007 ms  214.243 ms
 8  te-7-4-71.nycmny2wch010.wcg.Level3.net (4.68.110.22)  75.824 ms  75.695 ms  76.566 ms
 9  64.200.249.153 (64.200.249.153)  282.356 ms  138.384 ms  243.104 ms
10  * * *
11  * * *
12  * * *
13  * * *
14  www.merit.edu (198.108.1.92)  112.906 ms !C  110.515 ms !C  113.418 ms !C

Try Switch (swizzerland) they are testing warp tunnels - but not producting yet :)


Cheers Peter and Karin

--
Peter and Karin Dambier
Cesidian Root - Radice Cesidiana
Rimbacher Strasse 16
D-69509 Moerlenbach-Bonsweiher
+49(6209)795-816 (Telekom)
+49(6252)750-308 (VoIP: sipgate.de)
mail: peter@xxxxxxxxxxxxxxxx
mail: peter@xxxxxxxxxxxxxxxxxxxx
http://iason.site.voila.fr/
https://sourceforge.net/projects/iason/
http://www.cesidianroot.com/