Browsing by Author "Habtamu, Kumera"

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    Analysing Impact of Seamless MPLS on QoS
    (AAU, 2018-11) Habtamu, Kumera; Yalemzewd, Negash (PhD)
    The need for timely delivery of real time and mission-critical applications has led to a high demand for end-to-end QoS guarantees. Service providers, including Ethio telecom, have deployed mobile backhaul in addition to IP core network with separate MPLS domains for each network. Internal network topology of one domain and its policy implementations are proprietary information and inter-domain routing must be done without detailed knowledge of the entire network topology, policies and performance of the other domains. Lacks of global coordination between policies used in different domains, limitations of BGP for implementing end-toend QoS in inter-domain routing and its slow convergence during network failure are major challenges of the current inter-domain routing architecture. As stated by different authors such as in RFC 8277 (Using BGP to Bind MPLS Labels to Address Prefixes), Seamless MPLS provides framework for taking MPLS end-to-end in a scalable fashion, extending benefits of traffic engineering (TE) and guaranteed service-level agreements (SLAs) with deterministic network resiliency. It offers an alternative for implementing end-toend MPLS networks by integrating different domains into a single MPLS domain. The motivation of this thesis is to investigate and analyze impacts of implementing Seamless MPLS on QoS parameters. The impact on QoS parameters is analyzed by using two scenarios; MPLS with multiple domains and Seamless MPLS integrating three domains in to single MPLS domain. Simulation tools such as eNSP, Ostinato, NQA and MATLAB are used to compare performances of the two scenarios. The analysis results show that in Seamless MPLS throughput is improved by 36.87%, latency is improved by 15.98%, packet loss is improved by 20% and jitter is improved by 12.5% compared to MPLS. From the results one can understand that any service provider can benefit from deploying Seamless MPLS.