Device and method for network management

Network management systems for managing traffic signals in a network store node/link parameter signals and traffic parameter signals and calculate solutions defining intermediate nodes/links situated between sources and destinations for transporting said traffic signals from said sources to said destinations via said intermediate node/links and calculate route information per solution. Node/link parameter signals and traffic parameter signals are stored for several situations (like several predictions in the future) and solutions for each situation are calculated and a solution per situation is selected. Especially, solutions are compared with each other, and a solution is selected per situation in dependence of comparison results (comprising similarities/differences between solutions of different situations). Said route information may comprise link load parameters and/or resources consumption parameters and/or fairness parameters and/or throughput parameters.