Re: CLS to CLS Latency info

[Saku Ytti <saku () ytti fi>]

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