Embodiments of the invention are directed to a computer-implemented method for monitoring a computerized network comprising several nodes that are, each, configured for receiving and/or sending data packets via one or more communication channels, such that physical queues of data packets arriving at and/or departing from each of the nodes may form in said one or more communication channels. According to this method, virtual queues are maintained, wherein each of said virtual queues simulates a queue of data packets in a virtual channel associated to one of said one or more communication channels, wherein the service rate of said virtual channel can be varied. The virtual queues maintained are further monitored. Finally, this method comprises varying a service rate of one or more virtual channels, on which queues are respectively simulated by one or more of the virtual queues maintained.