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...ow load on the network – result in energy savings without affecting the service quality. The emerging concept of Software Defined Networking (SDN) [6], with its most prominent implementation OpenFlow =-=[7]-=-, provides for an increased control over networking devices, independent of vendor specific implementations. SDN enables, e.g., an efficient use of redundant links in datacenter networks [3], or incre...

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...n energyefficiency of network devices is possible, as shown by the decreasing cost per GB transferred [2]. Moreover, approaches like switching off components [3], links [4], or reducing the link rate =-=[5]-=-, can – given a low load on the network – result in energy savings without affecting the service quality. The emerging concept of Software Defined Networking (SDN) [6], with its most prominent impleme...

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... hardware is required. There exist already a number of approaches analyzing the power consumption and improving the energy efficiency of conventional enterprise or consumer grade network switches [9] =-=[10]-=-. However, little is known about the power consumption of OpenFlow switches. Therefore, this paper provides insights into the power consumption of these devices, with the goal to enable energy optimiz...

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...etworking devices, independent of vendor specific implementations. SDN enables, e.g., an efficient use of redundant links in datacenter networks [3], or increasing the link utilization to almost 100% =-=[8]-=-, which is hardly possible in conventional networks. To fully exploit the potential of SDN in network management on reducing the energy consumption, further information on the underlying hardware is r...

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...onitoring the traffic and power consumption, the analyzer can then derive a power model of the network device. These power models can then be used to optimize routing decisions [11] and network paths =-=[15]-=-, [16] in general network environments. The approaches are combined by Bolla et al. [17] into a unified framework allowing energy optimizations over a wide range of devices. Still, the power consumpti...

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...s [4], or reducing the link rate [5], can – given a low load on the network – result in energy savings without affecting the service quality. The emerging concept of Software Defined Networking (SDN) =-=[6]-=-, with its most prominent implementation OpenFlow [7], provides for an increased control over networking devices, independent of vendor specific implementations. SDN enables, e.g., an efficient use of...

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... to double within 3-4 years. An increase in energyefficiency of network devices is possible, as shown by the decreasing cost per GB transferred [2]. Moreover, approaches like switching off components =-=[3]-=-, links [4], or reducing the link rate [5], can – given a low load on the network – result in energy savings without affecting the service quality. The emerging concept of Software Defined Networking ...

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...power models. 1http://www.projectfloodlight.org/floodlight/ [Accessed: 2014-05-02] II. RELATED WORK Most recent publications either focus on the power consumption of conventional network hardware [9]–=-=[12]-=- or the performance of OpenFlow [13], [14]. Hlavacs et al. [9] analyze and model the power consumption of residential and professional switches. They show that for residential switches, the power cons...

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...as developed, allowing for a simple extension of the test cases used to stress the device. This is important, considering the quick evolution of the OpenFlow standards. Currently OpenFlow version 1.0 =-=[18]-=- is supported by the presented test suite, which at the time of measurements was the highest version supported by the hardware switch. The different test cases are defined analog to the dependencies o...

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...pected to increase, as the Internet traffic is projected to double within 3-4 years. An increase in energyefficiency of network devices is possible, as shown by the decreasing cost per GB transferred =-=[2]-=-. Moreover, approaches like switching off components [3], links [4], or reducing the link rate [5], can – given a low load on the network – result in energy savings without affecting the service quali...

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...t.org/floodlight/ [Accessed: 2014-05-02] II. RELATED WORK Most recent publications either focus on the power consumption of conventional network hardware [9]–[12] or the performance of OpenFlow [13], =-=[14]-=-. Hlavacs et al. [9] analyze and model the power consumption of residential and professional switches. They show that for residential switches, the power consumption decreases with a higher number of ...

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...switch. I. INTRODUCTION The overall power consumption of Information and Communications Technology (ICT) is estimated to range in between 84 and 143 GW, out of which network devices consume around 7% =-=[1]-=-. This is expected to increase, as the Internet traffic is projected to double within 3-4 years. An increase in energyefficiency of network devices is possible, as shown by the decreasing cost per GB ...

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...power consumption. By monitoring the traffic and power consumption, the analyzer can then derive a power model of the network device. These power models can then be used to optimize routing decisions =-=[11]-=- and network paths [15], [16] in general network environments. The approaches are combined by Bolla et al. [17] into a unified framework allowing energy optimizations over a wide range of devices. Sti...

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...odlight.org/floodlight/ [Accessed: 2014-05-02] II. RELATED WORK Most recent publications either focus on the power consumption of conventional network hardware [9]–[12] or the performance of OpenFlow =-=[13]-=-, [14]. Hlavacs et al. [9] analyze and model the power consumption of residential and professional switches. They show that for residential switches, the power consumption decreases with a higher numb...

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...ing the traffic and power consumption, the analyzer can then derive a power model of the network device. These power models can then be used to optimize routing decisions [11] and network paths [15], =-=[16]-=- in general network environments. The approaches are combined by Bolla et al. [17] into a unified framework allowing energy optimizations over a wide range of devices. Still, the power consumption of ...

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...of the network device. These power models can then be used to optimize routing decisions [11] and network paths [15], [16] in general network environments. The approaches are combined by Bolla et al. =-=[17]-=- into a unified framework allowing energy optimizations over a wide range of devices. Still, the power consumption of SDN operations is largely unknown. Congdon et al. [13] develop a model to improve ...

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...d reads measurements from the Data Collector, which are sent to the SyncMaster via the Message Handler. More details considering the measurement setup and accuracy of the measurements are detailed in =-=[19]-=- and [20]. IV. MEASUREMENTS First, the power consumption of the Open vSwitch is evaluated. According to the test dependencies, the dynamic power consumption of the Open vSwitch depends on two types of...

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...easurements from the Data Collector, which are sent to the SyncMaster via the Message Handler. More details considering the measurement setup and accuracy of the measurements are detailed in [19] and =-=[20]-=-. IV. MEASUREMENTS First, the power consumption of the Open vSwitch is evaluated. According to the test dependencies, the dynamic power consumption of the Open vSwitch depends on two types of traffic,...