A scalable real-time monitoring system for supporting traffic engineering

Quality of service based value-added services in IP networks necessitate the use of traffic engineering. The latter relies typically on monitoring data for both offline, proactive and dynamic, reactive solutions. A monitoring system should be scalable in terms of network size, speed and number of customers subscribed to value-added services. The article investigates the requirements of scalable monitoring system architectures, proposes principles for designing such systems and validates them through the design and implementation of a scalable monitoring system for QoS delivery in IP differentiated services (DiffServ) networks. Experimental assessment results are also presented.