One of the current research hot topics on IP networks is how to minimize energy-related communications. Currently, network technologies are responsible for 2% of global emissions of CO2 and its reduction would mean a significant improvement of environmental conditions and a reduction in the rate of global warming. There are several efforts related to Green IT such as the migration and consolidation of virtual machines, the impact of virtualization and cloud computing, and energy efficiency metrics. The proposed master thesis focuses on an exploration, in the sense of reviewing the state of the art (what other authors have done), to identify areas where contributions can be made, and suggest some sort of improvement. In this context, the i2CAT Foundation is taking part in the Canadian project GSN, an innovative project focusing on the relationship between networks and green datacenters, powered by renewable energies and following the “follow the sun/follow the wind approach”, in order to migrate Green ICT services and therefore reducing the carbon footprint. This first part of this thesis describes some contributions to the GSN project, such as helping in the installation of a solar-powered node, and the definition of the GSN Use Case. The second part focuses on a specific task not included in GSN but of vital importance and of great interest: the development of a power model for routers, specifically for virtual routers as those that can be migrated in the GSN Project.