DiffServ Guarantees in MPLS Networks Based on Optimal Disjoint Paths

Differentiated Services (DiffServ) provides sustenance in better utilizing network resources by proper managing and classifying network traffic promising Quality of Service (QoS) and at the same time addressing other needs of the modern IP networks. The primary goal of this research work is to highlight the impact of DiffServ on MPLS (Multi- Protocol Label Switched Networks) networks. The DiffServ architecture works by classifying traffic and acclimatize it in terms of a behavioral aggregate. In turn each of the above mentioned aggregate is identified by a single DiffServ codepoint. Within the core of the network, packets are forwarded according to the per-hop behavior associated with the DiffServ codepoint. One of the core issues in MPLS Networks is the mitigation plan in case of network congestion or network unavailability which is overcome by dynamic path establishment schemes wherein disjoint backup LSP’s are established along with the primary LSP and in turn these disjoint paths are near to optimal and provide fruitful results with DiffServ. Investigating the impact of DiffServ on these optimal disjoint paths in terms of performance metrics is the main source of motivation behind this research