F. Palmieri (Italy)
QoS, DiffServ, SLA, MPLS, TrafficEngineering
Today's Internet only provides best effort service, offering no guarantees that your service-level requirements can be met without some degradation at any time, irrespectively of other users of the network. With the rapid transformation of the Internet into a commercial infrastructure, demands for QoS and extremely reliable service have rapidly developed. To meet these requirements, the network must be enhanced with new technologies that offer the network operator capabilities for controlling its behaviour. Together, the capabilities offered by the combination of Differentiated Services and Multi-Protocol Label Switching enhance the ability of the network operator to control the network to deliver service according to customized service contracts. Multi-protocol Label Switching (MPLS) is actually the most promising technology, which plays a key role in IP networks by delivering QoS and traffic engineering features. In this paper, a scalable and complete framework for providing QoS is proposed. This framework consists of DiffServ at the transport/network layer combined with traffic engineering at the network layer. MPLS network performance behaviour has been experimentally investigated both from traffic engineering, as well as service differentiation perspectives to evaluate how well MPLS traffic engineering and QoS can improve the performance of today's Internet, and identify opportunities for improvement, and development of new mechanisms to ensure the provision of traffic engineering, as well as QoS features in future networks.
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