Simulation-based Comparative Study of OSPF and EIGRP Routing Protocols

Abstract

During the last decades people have become witnesses to the rapid expansion of data networks. New ways of working, communicating and socializing have been accompanied by new terms such as “Bring your own device” (BYOD), the “Internet of things” and of course Cloud services. Routing protocol evolution has followed a similar path, simple distance-vector protocols and default routes led the way to link-state and hybrid protocols. This evolution is attributed to the following business demands: fast convergence in data centers in order to accommodate redundancy and failover requirements, public and private clouds service level management, and higher percentage availability. The focus of this thesis is based on the two internal gateway protocols, OSPF and EIGRP, which monopolize the market, as more or less industry standards. Both operate inside an autonomous system, and while having different ways to form relationships among routing devices, adapt to topology changes and handle failures, they provide the same results: robust routing tables and network stability. The objective is to evaluate their performance characteristics and more specifically their network convergence duration, video conference packet delay variation, IP voice jitter and CPU utilization in two different topologies. The first topology provides the basis for simulation comparison, while the second examines the scaling effects of both protocols. Keywords: OSPF, EIGRP, network convergence duration, packet delay variation, IP voice jitter, CPU utilization, throughput, dynamic routing protocols, OPNET.

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