IEEE Seeks For Ethernet To 'Go Green' 166
alphadogg submitted a piece at the NetworkWorld site about the IEEE's efforts to introduce energy efficiency to Ethernet use. The group's Energy Efficient Ethernet group is looking into methods by which standards can be tweaked to encourage power savings. Current plans include ways to make computers 'choosier' about what level of bandwidth they're using. Idle systems would only run at 10Mbps, while email might draw 100Mbs, and scale up to 1000Mbps for large downloads and streaming video. The group is planning to discuss changes to the Ethernet link and higher layers. No restrictions are planned for device manufacturers, although the article suggests some companies might try to use energy efficiency as a competitive advantage. The EEE group estimates some $450 million a year could be saved via the use of energy efficient Ethernet technology.
What about the power supplies... (Score:5, Interesting)
I'd estimate that power supply inefficiency chews up more than this proposal will ever save. If you spent your time making the power supplies of PC's, Switches, routers more efficient you'd probably have a greater impact. How about better efficiency in the FET's, transistors and amplifier circuitry? Last time I checked, my Ethernet looms didn't get that hot. (isn't it all about "(i^2).R"?. Heck turning off the light in the switch room probably does more to save power. Plus all the heat im my server room is from the servers, not the Ethernet. If your that worried, switch to fiber.
I thought the transfer of data at the physical layer was through the transfer of 'holes' anyway.
Re:What about the power supplies... (Score:4, Interesting)
Re:Power over Ethernet Could Help (Score:5, Interesting)
An idea I've always thought about is converting to DC supplies indoors. AC has an advantage in terms of long-distance transmission, but in this day and age a HUGE part of our electric use is in devices that require DC power. Hell, many of the things that run AC (like lights) can in fact run DC with nary a problem. It's always boggled my mind why we have a bajillion power bricks sitting around, each venting heat like mad converting AC/DC, when in fact we could have a much more efficient "main" transformer installed in the house that does it on a larger scale and feeds our devices directly.
I imagine this would be even more useful for heavy power using environments like server farms - imagine if you can do with the huge boxy PSUs in every single box and just have a unified DC power source that can FAR more efficient than what's in the average beige boxen.
Re:Question? (Score:3, Interesting)
By any chance... (Score:4, Interesting)
It seems to me that, considering the number of ports active out there, they're talking about a tiny amount of savings per port for a total investment that could have a much larger effect if spent elsewhere.
Hell, I bet more power is wasted by the power supplies, overly conservative fan controls, uncleaned air filters, shorted out UPS batteries that should have been replaced decades ago, overpowered CPUs, and crappily written firmware of the currently deployed switches than is consumed by transmission losses.
Re:Saving energy now (Score:3, Interesting)
While this might not seem a whole lot of power, when you are looking at Enterprise size (say a few hundreds to thousands ports) setup, there can potentially be savings at the few hundred watts to thousand watts range.
I recall the first time I noticed ethernet power (Score:5, Interesting)
If I ever decide to spend money on a nice looking switch, I'll be sure to reference the power draw of the units I review.
It's not the power at the physical layer - (Score:3, Interesting)
So your TOE could easily have a variable speed CPU that basically goes to sleep when it can negotiate the physical interface down to 10Mbit, or whatever. SOunds pretty straightforward.
Re:Power over Ethernet Could Help (Score:3, Interesting)