Greening the NetFPGA Reference Router

Energies

Mei Song¹  Yifei Wei¹  Martin Collier²  Xiaojun Wang²  Olga Ormond²  Feng Guo² 

[1] School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;School of Electronic Engineering, Dublin City University, Dublin 9, Ireland;

关键词: green networking;    energy proportional routing;    dynamic frequency scaling;   

DOI  :  10.3390/en9070500

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown