Abstract: The invention proposes a method for configuring a network, wherein the network comprises a plurality of network sections, the method comprising the steps of accessing (S2) data from network sections; forming (S3) groups of network sections using a clustering method by using at least part of the accessed data as input data; and processing (S4) parameter on network section group level. By this method, the operation load during optimising a network consisting of a large number of cells can be greatly reduced. The invention also proposes a corresponding network optimising system.