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