A programmable energy efficient 40 Gb/s switch using frequency scaling and OpenFlow

The energy efficiency of network hardware has become a topic of considerable interest in recent years, motivated by the explosive growth of information and communication technology (ICT), and the ever increasing energy costs as well as the need to reduce Greenhouse Gas (GHG) emissions globally. One approach to saving energy in routers is to use dynamic adaptation, and this paper describes the development and performance of a testbed used to explore this approach to energy efficiency in the context of Software-Defined Networking (SDN).

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