trans-Atlantic latency?
Andy Ashley
lists at nexus6.co.za
Fri Jun 29 10:01:04 UTC 2007
Peter Dambier wrote:
>
> 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
>
Hi,
Over Level 3 transit from their London 2 gateway to the New York, 111
8th St. gateway:
(0.0.0.0)(tos=0x0 psize=64
bitpattern=0x00)
Fri Jun 29 10:56:25 2007
Keys: Help Display mode Restart statistics Order of fields quit
Packets Pings
Host
Loss% Snt Last Avg Best Wrst StDev
1.
v5-csw01.ln1.qubenet.net
0.0% 188 1.4 6.2 0.7 197.4 24.7
2.
bdr01.ln1.qubenet.net
0.0% 188 1.3 5.0 0.6 214.4 26.4
3.
ipcolo2.london2.level3.net
0.0% 188 1.3 1.4 0.8 2.4 0.3
4.
ae-0-52.bbr2.London2.Level3.net
0.0% 188 1.4 2.8 1.0 52.2 5.9
5.
ae-0-0.bbr2.NewYork1.Level3.net
0.0% 187 67.4 69.1 66.4 181.3 12.0
as-0-0.bbr1.NewYork1.Level3.net
6.
ae-31-89.car1.NewYork1.Level3.net
0.0% 187 67.5 69.3 66.7 227.1 13.9
ae-21-79.car1.NewYork1.Level3.net
ae-11-69.car1.NewYork1.Level3.net
ae-41-99.car1.NewYork1.Level3.net
7.
bdr01.ny1.qubenet.net
0.0% 187 67.4 67.4 66.8 69.8 0.4
Over a private DS-3 circuit from and to same buildings the average
latency is probably 4ms less than the above.
Andy.
More information about the NANOG
mailing list