Multi-Protocol Label Switching Traffic Engineering with QoS

Sammanfattning: The world has emerged as a global village. Internet has brought an amazing change in the era of modern communications. Demand for multimedia applications and an ever increasing amount of VoIP traffic have increased data rate and bandwidth requirements. It has become a big chal-lenge to provide best quality applications. Traffic engineers are working hard over Internet Protocol (IP) and Routing Protocols (RPs) in order to cope with this challenge. IP networks have offered these services efficiently until now, but there are several issues with IP routing that affect the Quality of Service (QoS). Multi-Protocol Label Switching (MPLS) has emerged as an agile technology which promises effective security together with high speed data delivery. MPLS networks use switching instead of conventional routing. MPLS doesn’t replace existing IP networks, but guarantees instead better QoS in existing IP networks as well as future routing technologies, providing thus a suitable environment for Traffic Engineering (TE). The Class of Service (CoS) architecture provided by MPLS can easily be coordinated with IP QoS mecha-nisms. Traffic can be switched based on resource utilization and network performance instead of using static routing techniques such as selecting a path with least cost, optimizing thus the MPLS network for heavy application at desired quality.