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TCP/IP networks for dealing with congestion. The network delay and the number of users change constantly, which might lead to transmission problems. Usually, these problems are solved following a data communication approach such as drop tail or random early detection (RED) algorithms. Recently, more involved techniques based on an active queue management (AQM) control system have been proposed. This paper presents a probabilistic methodology to test whether a given AQM feedback controller satisfies a predefined set of requirements when dealing with control congestion under a variety of network configurations with a certain degree of confidence. The proposed technique is demonstrated through simulation in NS-2.