nanog mailing list archives
Re: 60 ms cross-continent
From: Martin Hannigan <hannigan () gmail com>
Date: Sat, 20 Jun 2020 16:36:47 -0400
On Sat, Jun 20, 2020 at 16:14 Bryan Fields <Bryan () bryanfields net> wrote:
On 6/20/20 1:56 PM, Saku Ytti wrote:On Sat, 20 Jun 2020 at 20:52, Wayne Bouchard <web () typo org> wrote:And thus far, no one has mentioned switching speed and other electronic overhead such as the transceivers (that's the big one, IIRC.)This will be something from tens of meters (low lat swich), to few hundred meters (typical pipeline), to 2km delay (NPU+FAB+NPU) per active IP device. If that is a big one, I guess it depends, cross atlantic, no, inside rack, maybe.I think he might be referring to the newer modulation types (QAM) on long haul transport. There's quite a bit of time in uS that the encoding takes into QAM and adding FEC. You typically won't see this at the plug-able level between switches and stuff. 60ms is nothing really, and I'm happy I don't need to play in the HFT space anymore. I do wish my home connection wasn't 60 ms across town as spectrum wants takes TPA-ATL-DCA-DEN-NY to get to my rack. :-)
working on that ...... :-)
-- Bryan Fields 727-409-1194 - Voice http://bryanfields.net
Current thread:
- 60 ms cross-continent William Herrin (Jun 20)
- Re: 60 ms cross-continent Joe Greco (Jun 20)
- Re: 60 ms cross-continent Tim Požár (Jun 20)
- Re: 60 ms cross-continent Tim Durack (Jun 20)
- Re: 60 ms cross-continent Tim Durack (Jun 20)
- Re: 60 ms cross-continent Dave Cohen (Jun 20)
- Re: 60 ms cross-continent Mel Beckman (Jun 20)
- Re: 60 ms cross-continent Wayne Bouchard (Jun 20)
- Re: 60 ms cross-continent Saku Ytti (Jun 20)
- Re: 60 ms cross-continent Bryan Fields (Jun 20)
- Re: 60 ms cross-continent Martin Hannigan (Jun 20)
- Re: 60 ms cross-continent Saku Ytti (Jun 20)
- Re: 60 ms cross-continent Tim Durack (Jun 20)
- Re: 60 ms cross-continent Tim Požár (Jun 20)
- Re: 60 ms cross-continent Joe Greco (Jun 20)
- Re: 60 ms cross-continent Tony Finch (Jun 21)
- Re: 60 ms cross-continent Alejandro Acosta (Jun 20)
- Re: 60 ms cross-continent Joe Hamelin (Jun 22)
- Re: 60 ms cross-continent Rod Beck (Jun 22)
- Re: 60 ms cross-continent Carsten Bormann (Jun 20)
- Re: 60 ms cross-continent Marshall Eubanks (Jun 20)