Breaking News
Comments
Newest First | Oldest First | Threaded View
markhahn0
User Rank
Author
re: Short reach chips to drive low cost 10G switches
markhahn0   2/8/2013 6:56:01 PM
NO RATINGS
the cable lengths quoted are pretty peculiar - no in-rack cable needs to be 5M - 1.5-2.5 would be preferred to minimize the excess. and 30M to an upper-level switch is also a bit extreme, since it's easy to arrange ~50 racks within a 10-12M diameter (even for a spread-out air-cooled cluster). I wonder whether they said meters but were thinking feet... that anecdote from the patch-panel maker is pretty sad. they seem to be thinking of traditional IT, not clusters. a cluster will not normally use any patch panels: nodes connect directly to the leaf/TOR switch, and they connect directly to spine switches. it would be sad if archaic cable-length concerns quashed this effort. I wonder how much the PHY is keeping switches from getting reasonable-priced. 10G won't really take off until its per-port switch+cable+nic price is very close to 1G (let's say, around $100.)

Dan Dove
User Rank
Author
re: Short reach chips to drive low cost 10G switches
Dan Dove   2/8/2013 5:16:25 PM
NO RATINGS
Great article Rick. One point that was not captured is that it takes 75% to pass a technical motion in the IEEE Study Groups. While there was support among a broad range of participants, a popular proposal can lose with a 74% approval.

krisi
User Rank
Author
re: Short reach chips to drive low cost 10G switches
krisi   2/7/2013 10:24:54 PM
NO RATINGS
150 mW per Gb/s, pretty impressive for 10GBase-T



Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
5G LTE is on the way. These systems will require more ...
Protecting sensitive electronic circuitry from voltage ...
09:45
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Watch as a web server authenticates or rejects a water ...
Protecting sensitive electronic circuitry from voltage ...
Power can be a gating factor in success or failure of ...
Get to market faster and connect your next product to the ...
00:44
See how microQSFP is setting a new standard for tomorrow’s ...
The LTC3649 step-down regulator combines key features of a ...
Once the base layer of a design has been taped out, making ...
In this short video we show an LED light demo to ...
The LTC2380-24 is a versatile 24-bit SAR ADC that combines ...
In this short video we show an LED light demo to ...
02:46
Wireless Power enables applications where it is difficult ...
07:41
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
01:48
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...