energy-aware network design
core network are usually designed looking at performance indices such as latency or congestion minimization, disregarding in the design phase network energy efficiency. thus, energy reduction techniques were initially devised for already designed networks. Given the increasing importance of energy consumption from both the cost and environmental point of view, we investigate several design choices of core networks taking into account energy constraints in the network design phase. It is important to properly choose and install energy-efficient and reliable devices (including fiber links),and to properly configure them (including routing of lightpaths over the physical topology and routing of IP traffic)