CLS to CLS Latency info
Hello there I have been searching for CLS (Cable Landing Station) to CLS latency infirnation for submarine cables. I was able to identify only a handful of them via sales catalogs. I am still missing like 320~ systems, does wnyone have this info available? If i can’t find the data, i am going to formulate from lentgh of fiber diveded by speed of light on fibre (~ +\- resistance) but I really would prefer actual ping ;) This is for www.networkatlas.org project. Thank you in advance! Mehmet -- Mehmet +1-424-298-1903
I’d be astonished if they varied much from lightspeed. -Ben
On Oct 29, 2018, at 8:11 PM, Mehmet Akcin <mehmet@akcin.net> wrote:
Hello there
I have been searching for CLS (Cable Landing Station) to CLS latency infirnation for submarine cables. I was able to identify only a handful of them via sales catalogs. I am still missing like 320~ systems, does wnyone have this info available?
If i can’t find the data, i am going to formulate from lentgh of fiber diveded by speed of light on fibre (~ +\- resistance) but I really would prefer actual ping ;)
This is for www.networkatlas.org project. Thank you in advance!
Mehmet -- Mehmet +1-424-298-1903
Agreed. Actual ping would not work, if we're talking about unixy system sending ping. Active devices increase latency in single digit microsecond, the host latency is much much higher, so the ping results would largely measure your host latency variation. You'd need NIC with hardware timestamping to get anything useful. I don't think we have unixy 'ping' tool which uses that? Even though typical server NIC today does do that, unfortunately SR-IOV does not expose it to guests, so guests would need direct NIC access to utilise it. On Tue, 30 Oct 2018 at 10:03, Ben Cannon <ben@6by7.net> wrote:
I’d be astonished if they varied much from lightspeed.
-Ben
On Oct 29, 2018, at 8:11 PM, Mehmet Akcin <mehmet@akcin.net> wrote:
Hello there
I have been searching for CLS (Cable Landing Station) to CLS latency infirnation for submarine cables. I was able to identify only a handful of them via sales catalogs. I am still missing like 320~ systems, does wnyone have this info available?
If i can’t find the data, i am going to formulate from lentgh of fiber diveded by speed of light on fibre (~ +\- resistance) but I really would prefer actual ping ;)
This is for www.networkatlas.org project. Thank you in advance!
Mehmet -- Mehmet +1-424-298-1903
-- ++ytti
The speed of light through fiber is about 2/3 the speed of light through a vacuum. This is why HFT prefers microwave over fiber when it comes to latency. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "Ben Cannon" <ben@6by7.net> To: "Mehmet Akcin" <mehmet@akcin.net> Cc: "nanog" <nanog@nanog.org> Sent: Tuesday, October 30, 2018 2:59:48 AM Subject: Re: CLS to CLS Latency info I’d be astonished if they varied much from lightspeed. -Ben On Oct 29, 2018, at 8:11 PM, Mehmet Akcin < mehmet@akcin.net > wrote: Hello there I have been searching for CLS (Cable Landing Station) to CLS latency infirnation for submarine cables. I was able to identify only a handful of them via sales catalogs. I am still missing like 320~ systems, does wnyone have this info available? If i can’t find the data, i am going to formulate from lentgh of fiber diveded by speed of light on fibre (~ +\- resistance) but I really would prefer actual ping ;) This is for www.networkatlas.org project. Thank you in advance! Mehmet -- Mehmet +1-424-298-1903
We are going to be making the data available soon at www.networkatlas.org - we are going to be able to make it so people can self upload/manage the information so we are able to crowdsource the info. here is the latest screenshots from networkatlas ;) https://drive.google.com/drive/folders/1JsV7QRaWkzj9W3oEwJe7Qm-vqwXjOdu3?usp... if anyone wants to demo the beta, please let me know and i can share the link privately (i am trying to not do it here because it's running on a small infrastructure now and don't want to crash it;) On Tue, Oct 30, 2018 at 7:30 AM Mike Hammett <nanog@ics-il.net> wrote:
The speed of light through fiber is about 2/3 the speed of light through a vacuum. This is why HFT prefers microwave over fiber when it comes to latency.
----- Mike Hammett Intelligent Computing Solutions <http://www.ics-il.com/> <https://www.facebook.com/ICSIL> <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> <https://www.linkedin.com/company/intelligent-computing-solutions> <https://twitter.com/ICSIL> Midwest Internet Exchange <http://www.midwest-ix.com/> <https://www.facebook.com/mdwestix> <https://www.linkedin.com/company/midwest-internet-exchange> <https://twitter.com/mdwestix> The Brothers WISP <http://www.thebrotherswisp.com/> <https://www.facebook.com/thebrotherswisp> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> ------------------------------ *From: *"Ben Cannon" <ben@6by7.net> *To: *"Mehmet Akcin" <mehmet@akcin.net> *Cc: *"nanog" <nanog@nanog.org> *Sent: *Tuesday, October 30, 2018 2:59:48 AM *Subject: *Re: CLS to CLS Latency info
I’d be astonished if they varied much from lightspeed.
-Ben
On Oct 29, 2018, at 8:11 PM, Mehmet Akcin <mehmet@akcin.net> wrote:
Hello there
I have been searching for CLS (Cable Landing Station) to CLS latency infirnation for submarine cables. I was able to identify only a handful of them via sales catalogs. I am still missing like 320~ systems, does wnyone have this info available?
If i can’t find the data, i am going to formulate from lentgh of fiber diveded by speed of light on fibre (~ +\- resistance) but I really would prefer actual ping ;)
This is for www.networkatlas.org project. Thank you in advance!
Mehmet -- Mehmet +1-424-298-1903
On 30/Oct/18 05:11, Mehmet Akcin wrote:
Hello there
I have been searching for CLS (Cable Landing Station) to CLS latency infirnation for submarine cables. I was able to identify only a handful of them via sales catalogs. I am still missing like 320~ systems, does wnyone have this info available?
If i can’t find the data, i am going to formulate from lentgh of fiber diveded by speed of light on fibre (~ +\- resistance) but I really would prefer actual ping ;)
This is for www.networkatlas.org <http://www.networkatlas.org> project. Thank you in advance!
For the SEACOM cable system, you're welcome to use: http://as37100.net/ The CLS-to-CLS numbers are live, so they are accurate. Mark.
participants (5)
-
Ben Cannon -
Mark Tinka -
Mehmet Akcin -
Mike Hammett -
Saku Ytti