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Network virtualization techniques allow for the coexistence of many virtual networks hosted in a same substrate network. Virtual router migrations allow for resource consolidation with the consequence to reduce the power consumption in low traffic periods. Unfortunately virtual router migrations have the effect of degrading the Quality of Service during the downtime in which the router is not able...
The design of an energy efficient IP network is one of the most important challenge that researchers have begun to address in the last decades. A promising resource consolidation technique to improve the energy efficiency of Internet is based on the virtual router migration: when traffic decreases virtual routers are moved and consolidated in fewer nodes of the underlying physical network in order...
Virtualization and migration techniques have been largely investigated in Data Center applications to reduce the power consumption and to better utilize the physical resources. In this paper we studied the adoption of such techniques in an IP network and validate our approach in a real testbed based on the use of Software Routers. The contribution is organized in two parts. The first one is devoted...
As a consequence of the rapid growth of Internet, the power consumption of the network equipment has increased significantly. This trend will continue in the next years and some strategies to contain the power used in the IP network are needed. Among the green networking strategies the virtualization class and in particular the deployment of virtual routers can lead to a high energy saving. In this...
We illustrate an experimental test-bed to evaluate the routing plane migration time based on QUAGGA routing software. The operation mode correctness of the OSPF routing protocol is also verified. The realized test-bed allows for an evaluation of the migration time as a function of the number of nodes of an emulated network. We show that even when the network links are loaded with data traffic, the...
The power consumption of an Optical Packet Switch equipped with SOA technology based Spanke switching fabric is evaluated. Sophisticated analytical models are introduced to evaluate the power consumption versus the offered traffic, the main switch parameters, and the used device characteristics. The impact of Amplifier Spontaneous Emission (ASE) noise generated by a transmission system on the power...
We evaluate the average energy consumption per bit in Optical Packet Switches equipped with BENES switching fabric realized in Semiconductor Optical Amplifier (SOA) technology. We also study the impact that the Amplifier Spontaneous Emission (ASE) noise generated by a transmission system has on the power consumption of the BENES switches due to the gain saturation of the SOAs used to realize the switching...
In this paper we propose an analytical model able to analytically evaluate the performance of an asynchronous Optical Packet Switch (OPS) realized in Semiconductor Optical Amplifier (SOA). The considered switch has a bufferless architecture that shares the wavelength converters for input wavelength. The obtained results show how the proposed model is more accurate than others proposed in literature...
In this paper we compare the average energy consumption per bit of the Matrix-Vector Multiplier Crossbar (MVMC) and BENES Optical Packet Switches realized in Semiconductor Optical Amplifier (SOA) technology. Sophisticated analytical models are introduced to evaluate the power consumption versus the offered traffic, the main switch parameters, and the used device characteristics. We show that for large...
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