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An Initial Evaluation of Energy Efficient Ethernet

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4 Author(s)
Reviriego, P. ; Univ. Antonio de Nebrija, Madrid, Spain ; Christensen, K. ; Rabanillo, J. ; Maestro, J.A.

In September 2010, the Energy Efficient Ethernet (IEEE 802.3az) standard was officially approved. This new standard introduces a low power mode for the most common Ethernet physical layer standards and is expected to provide large energy savings. In this letter, for the first time, Network Interface Cards (NICs) that implement Energy Efficient Ethernet (EEE) are used to measure energy savings with real traffic. The data presented will be useful to better estimate the energy savings that can be achieved when EEE is deployed. Existing analysis of EEE based on simulations predict a large overhead due to mode transitions between active and low power modes. The experimental results confirm that transition overheads can be significant, leading to almost full energy consumption even at low utilization levels. Therefore traffic patterns will play a key role in the energy savings achieved by EEE as it becomes deployed in the field.

Published in:

Communications Letters, IEEE  (Volume:15 ,  Issue: 5 )

Date of Publication:

May 2011

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