[CentOS] 10 GBASE-T

Pasi Kärkkäinen pasik at iki.fi
Thu Jan 14 08:30:23 UTC 2010


On Thu, Jan 14, 2010 at 10:08:55AM +0200, Pasi Kärkkäinen wrote:
> On Wed, Jan 13, 2010 at 02:31:09PM -0800, nate wrote:
> > 
> > 10GbE is really cheap these days(cheaper than 1GbE in some cases
> > on a per Gb basis) if you need faster performance, and simple
> > to configure, I wrote a blog on this a couple of months ago:
> > 
> > http://www.techopsguys.com/2009/11/17/affordable-10gbe-has-arrived/
> > 
> 
> This reminded me of something. I remember reading some website 
> (possibly Cisco's) earlier, and they mentioned 10 GBASE-T had 
> much higher latency than other 10 Gbit options.
> 
> Have you paid attention to this? How big is the difference nowadays? 
> Or I wonder if it was just on some specific product..
> 
> http://en.wikipedia.org/wiki/10_Gigabit_Ethernet says:
> 
> "10GBASE-T has higher latency and consumes more power than other 10
> gigabit Ethernet physical layers. In 2008 10GBASE-T silicon is now
> available from several manufacturers with claimed power dissipation 
> of 6W and a latency approaching 1 microsecond"
> 
> 1 microsecond doesn't sound bad.. :)
> 

http://www.bladenetwork.net/userfiles/file/PDFs/WP_10GbE_Cabling_Options_091016.pdf

That PDF claims this:

10GBase-T:
	- latency 2.6 us
	- power per port: 4-6W/port
	- price per port: $400
	- max distance: 100m

10 Gbit SFP+:
	- latency 0.3 us
	- power per port: 1.5W
	- price per port: $40
	- max distance: 8.5m

-- Pasi



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