Traffic performance evaluation on DiffServ-aware MPLS networks

Antonas-Belegrinis, A. (2015). Traffic performance evaluation on DiffServ-aware MPLS networks (MSc Computing Dissertation). Edinburgh Napier University (Qasem, M., Russell, G.).



Due to the remarkable growth of the Internet during the last few years, along with the constant increase of end users, transmission speeds and new, more demanding applications, Internet Service Providers (ISPs) have been presented with new challenges, such as increasing their network’s performance or providing enhanced data services to their users. Furthermore, the quality of data flows has been substantially downgraded because of current routing protocols and the Best Effort service of the Internet, which do not use network resources as efficiently as possible.
Over the years, numerous technologies have been introduced that try to solve these issues and provide Quality of Service (QoS) to data flows. This dissertation focuses on two of these technologies, Multi-Protocol Label Switching (MPLS) and Differentiated Services (DiffServ), and the benefits they can offer to traditional networks. MPLS is a technology that can be used, among others, to simplify the routing process by setting up virtual paths and forwarding traffic based on information added to packets. DiffServ, on the other hand, has the ability to prioritize traffic using queueing mechanisms on routers, again based on packet header information. While MPLS and DiffServ are independent technologies, it has been advocated that they can work together to further improve the performance of traffic. To this end, this dissertation aims to study these architectures and their combination, and conduct an experiment in a network simulator, in order to compare the performance of traffic metrics, such as bandwidth, delay and jitter, between traditional and QoS-enabled networks.
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