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Energies 2016, 9(7), 500; doi:10.3390/en9070500

Greening the NetFPGA Reference Router

1
School of Electronic Engineering, Dublin City University, Dublin 9, Ireland
2
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Luca Chiaraviglio
Received: 3 April 2016 / Revised: 27 May 2016 / Accepted: 17 June 2016 / Published: 29 June 2016
(This article belongs to the Special Issue Energy-Efficient and Sustainable Networking)
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Abstract

Energy efficiency is an important criterion in the design of next generation networks for both economic and environmental concerns. This paper presents an energy-efficient router that is able to dynamically adapt its routing capability in response to real-time traffic load, achieving energy proportional routing. The NetFPGA reference router, which operates at one of two frequencies (125 MHz or 62.5 MHz), requires a board reset to switch frequencies. We have modified the reference router to allow dynamic switching among five operating frequencies. Experiments with real traces indicate that, compared to the reference router, a 10% power reduction can be achieved through dynamic frequency scaling. When the router is further modified to support green traffic engineering and Ethernet port shut-down, power consumption can be reduced by 46% while maintaining the required quality of service. This allows the router to meet the instantaneous performance requirements while minimizing power dissipation. Similar results can be expected when these general power-saving principles are applied in future commercial routers. View Full-Text
Keywords: green networking; energy proportional routing; dynamic frequency scaling green networking; energy proportional routing; dynamic frequency scaling
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Guo, F.; Wang, X.; Song, M.; Wei, Y.; Ormond, O.; Collier, M. Greening the NetFPGA Reference Router. Energies 2016, 9, 500.

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