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--- playground:mission-log-template1 [2015/06/18 08:57] – chrono
+++ playground:mission-log-template1 [2015/07/07 12:01] – [Test-Setup] chrono
@@ Line 1: / Line 1: @@
-====== Review: Managed Low-Power Ethernet Switches? ======
+====== Review: Managed Low-Power Switch DGS-1100-8 ======
-In a past Mission-Log, we've reviewed the power consumption of so labeled "green" Switches (consumer-grade/unmanaged) that could be used in off-grid environments and they performed really well. With more technology and infrastructure, the need increased for more Ethernet features like VLANs, trunks and many other features, usually only offered by expensive, loud and very power hungry managed/enterprise switches. Luckily this has changed and we could test and already deploy managed but very low power and fanless (silent) switches: Check out the [[http://us.dlink.com/products/business-solutions/easysmart-8-port-gigabit-switch/|D-Link DGS-1100-8]]
+In a past Mission-Log, we've [[mission:log:2012:01:13:dlink-green-ethernet-switch-review|reviewed the power consumption of "green" Ethernet Switches]] (consumer-grade/unmanaged) that could be used in off-grid environments and they performed really well. Compliant with IEEE 802.3az Energy Efficient Ethernet, these switches consume less energy by cutting down on power consumption when the traffic volume is low and automatically measure the length of the connected cables to adjust power usage, when cables are shorter than 20 meters. In addition, they monitor the link status of every port and drastically reduce power consumption when a port has no link. With more technology and infrastructure, the need increased for more Ethernet features like VLANs, trunks and many other features, usually  offered only by expensive, loud and very power hungry managed/enterprise switches.
+Luckily this situation has changed and we could test and already deploy a new pair of managed but very low power and fanless (silent) switches: The [[http://us.dlink.com/products/business-solutions/easysmart-8-port-gigabit-switch/|D-Link DGS-1100 Family]], which also come in a sturdy metal case and with the benefit of a (limited - due to legal issues on a per country basis) lifetime warranty.
 ====== ======
@@ Line 7: / Line 9: @@
 ===== Power Consumption Analysis =====
-Fortunately muCCC had the 2nd generation of these switches deployed, so it was possible to take comparative measurements with different use-scenarios and two generations of the same model in a controlled environment. The switches were measured directly on the 5V input in order to avoid misleading results due to power conversion losses. Each switch was tested in the same environment using different operation modes to determine a more real-life power consumption profile:
+For better comparison all measurement results have been put together. A couple of people have been a bit unhappy, that we've only documented power consumption on the DC side in the past review (which is all we care about for off-grid usage). As a result, this time we've documented DC and Wall-Power consumption (with the original D-Link AC/DC plug).
+==== Test-Setup ====
+Wall-Power was measured using [[http://www.elv.de/elv-energy-master-profi-energiekosten-messgeraet-1.html|this device]], DC consumption was measured with our [[http://www.amazon.de/dp/B00LZ07BG0|Portapow USB Powermeter]], which also has a connection kit for barrel connectors. For better comparison, we've tested the same set of scenarios as in the first test to keep results as comparable as possible.
+==== Results ====
+| ||  DGS-1008D G2  ||  DGS-1008D G3  || DGS-1100-8 Rev A1 |||
+| || {{:blog:2012-02-10:d-link-dgs-1008d.jpg?235|}}||{{:blog:2012-02-10:dlink-ds1008v2.jpg?235|}}||{{:blog:2012-02-10:dlink-ds1008v2.jpg?235|}}|||
+| Clients |Mode| 5V DC Current | 5V DC Power | 5V DC Current | 5V DC Power | 5V DC Current | 5V DC Power| 230V AC Power |
+| 0 | Switch only | 66-93mA | 0.33-0.46W | 67-111mA | 0.33-0.55W | 105mA | 0.52W | 0.8W |
+| 1 | Client Stdby | 100-160mA | 0.5-0.8W | 109-124mA | 0.54-0.62W | 131mA | 0.65W | 1W |
+| 2 | Client Stdby | 141-194mA | 0.70-0.97W | 153-161mA | 0.76-0.80W | 154mA | 0.77W | 1.1W |
+| 2 | Client Idle | 160-200mA | 0.8-1W | 170mA | 0.85W | 212mA | 1.06W | 1.5W |
+| 3 | Client SCP | 250mA | 1.25W | 210-220mA | 1.07W | 238mA | 1.2W | 1.7W |
+| 4 | Client SCP | 250mA | 1.25W | 210-220mA | 1.07W | 264mA | 1.32W | 1.9W |
-| ||  DGS-1008D G2  ||  DGS-1008D G3  ||
-| || {{:blog:2012-02-10:d-link-dgs-1008d.jpg?235|}}||{{:blog:2012-02-10:dlink-ds1008v2.jpg?235|}}||
-|Connected|Mode|Current|Power|Current|Power|
-|0 Clients|Switch only|66-93mA|0.33-0.46W|67-111mA|0.33-0.55W|
-|1 Client|Client Stdby|100-160mA|0.5-0.8W|109-124mA|0.54-0.62W|
-|2 Clients|Client Stdby|141-194mA|0.70-0.97W|153-161mA|0.76-0.80W|
-|2 Clients|Client Idle|160-200mA|0.8-1W|170mA|0.85W|
-|3 Clients|Client SCP|250mA|1.25W|210-220mA|1.07W|
-|4 Clients|Client SCP|250mA|1.25W|210-220mA|1.07W|
 ===== Reliability & Performance =====
-The DGS-1008D test candidate has been up and running 24x7 for more than 365 days now without any glitch or the necessity to power cycle. Power saving often leads to compromises in performance but the switch performed equally well compared to a CISCO 3560, that was in use before power consumption became a major issue.
+The DGS-1100-8 test candidates have been up and running 24x7 for more than 365 days now without any glitch or the necessity to power cycle.
+<WRAP round tip>
+When you make changes to the configuration in the web-interface, make sure to click the **"Save Configuration"** button in the top left menu to actually save your changes to non-volatile RAM. Otherwise the next power cycle will wipe your config changes :)
+</WRAP>
 ===== Conclusion =====

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