I have a project going on where I'm trying to use 2 of the 3 devices my Cox cable internet service allows, called Multiple Computer Access. Hint, it's related to a talk on the OpenVPN VM that I'm giving next Friday. I actually want a cable drop to a VM, outside the firewall, in addition to the traditional cable to the WAN port on my WiFi router. The thing is, I didn't have an extra Gigabit switch laying around. Since my broadband is now a claimed 150Mbps down and 30Mbps up (tests actually exceed that, pictured here), I sure didn't want to slow my entire home network's speed to 100Mbps max (also pictured), with that old 10/100 network switch I had temporarily connected, burning 10 watts for just 3 active ethernet devices. So it was time to give the D-Link 5-Port Gigabit Switch (DGS-1005G) a whirl. Having already used its big brother D-Link 8-Port Gigabit Switch (DGS-1008G) in my home's upstairs office for over 2 years already, I was confident that the 5 port model would also run cool and work well in the basement. So far, so good! No problems with the Energy-Efficient Ethernet known as IEE 802.3AZ showing no evidence of any slowdown with these networked devices:
- Cisco DPQ3212 DOCSIS 3.0 Cablemodem with 2 Carrier grade VOIP ports, using a 1' CAT6 cable
- Linksys EA6900 802.11ac WiFi Router, using a 100' CAT6 cable, and discussed here and here on TinkerTry
- Intel I350T2BLK Dual Port Gigabit Server Adapter, using a 50' CAT6 cable, and discussed here on TinkerTry
The other nice thing about moving up in speed from my decade old Netgear FS108 10/100 switch? Well, I was using 10 watts for the above 3 devices, now with the DGS-1005G in place, I now use up only 2 watts. Nice!
8 watts saved, for 24x7 use, that's an energy savings of $12.58 a year (calculated here). So for my use, this $25 device will pay for itself in just 2 years!
D-Link Green technology explained on the product page:
The DGS-1005G 5-port Gigabit Switch helps you conserve energy automatically through several methods. It automatically powers down ports that have no link activity, allowing the switch to save energy by cutting power usage for unused ports or ports connected to computers that have been shut down. It can also detect connected cable lengths and adjust power usage accordingly, helping you save energy without effecting networking performance.
If you'd like a deeper look into the way this works, see also the animations at Power Savings by Link Status and Power Saving by Cable Length at dlinkgreen.com/energyefficiency.asp, or by clicking on the picture at right. With >400 Amazon customer reviews to date, it's pretty clear from the 4.5 stars, and few serious complaints, that this was a safe buy. Both models support Jumbo Frames, with the 5 port support up to 9000 Bytes, and the 8 port up to 9720 Bytes. Both models are auto-crossover for all ports. Admittedly, I'm not currently using either of those features. I should point out that the Amazon photos you get when clicking on the shopping links below show metal around the ports, and a rear power supply port. Instead, refer to the accurate D-Link pics for the 5 port and 8 port models that ship today, pictured below. D-Link has apparently decided to go with a USB Mini-b port on the side for the power input, as seen in the unboxing video. While there are no activity LEDs on the ports themselves, the numbered LEDs on the top surface indicate which port # is active:
- green for 1000 Mbps link speed
- amber for 100 Mbps link speed
- these colored LEDs flicker with port activity
I find this LED illumination pattern adequate for my set-it-and-forget use of my D-Link 5 and 8 port switches, that are in out-of-the-way spots in my home.
Unboxing and brief watt burn testing video below: http://youtu.be/kVFkFVSiPOA
I've now picked up a D-Link DGS-1024A 24 port Gigabit Switch, and I'm equally pleased. It's the always-on switch that handles the "backbone" of my home network. On the specifications page, you'll notice that 14 watts is the max this will ever use, presumably with 24 long cables attached that are all active. In the video I created below, I replace my 2 Netgear 16 port switches, which burned 22 watts total. They've been running 24x7, for about a decade. I simply moved the existing cabling over to the new switch, and I'm now down to just 7 watts total. Nice, a 15 watt savings! No throughput drop noticed on any of my attached devices. While I do wish the port # labels on the back were in a contrasting color, and above the top row of ports, that's nitpicking. For the most part, this device will just sit there for years, and rearranging the cabling for the nice pattern seen in the picture at right will make it easy to spot trouble that might arise someday, should one of those colorful groupings indicate a change.
This project works out to a savings of about $24 per year for my household, calculated here. That's not counting the household cooling needed to compensate for the heat the old power supplies and units threw off, which could double my yearly savings. This new unit runs very cool to the touch. I'm admittedly a fan of devices that require no fan. Eliminating moving parts means fewer potential points of failure, and less noise in my residential setting. According to the Datasheet, the operating temperature is 32 to 104 °F (0 to 40 °C).
Just a minor footnote. Despite the pictures seen in the Amazon picture seen above, D-Link has apprently removed the EEE+ switch on the front bezel. One could guess/assume that may mean that compatibility issues may have been resolved, removing the need to be able to switch it off. Or just cost savings (price is now undre $95 USD). Not really sure. Here's what the D-Link Data Sheet states:
D-Link’s Innovative EEE+ provides the same power-saving benefits of EEE but also provides compatibility with legacy devices