The present invention relates to a method for reconfiguring data network nodes (3, 5, 7) in a data network (1), the method comprising the steps of: storing information comprising: a first set of data (25I-25V) representing a current configuration of the data network nodes (3, 5, 7), and a second set of data (27I-27V) representing a desired configuration of the data network nodes (3, 5, 7); generating, from the first set of data (25I-25V) and the second set of data (27I-27V), an information entity (33, 33I-33V) representing a difference between the current configuration and the desired configuration, and reconfiguring at least one of the data network nodes (3, 5, 7) using the information entity (33, 33I-33V).