Capacity planning of network redesign — A case study

Although distributed computing over a network of computers has become a reality; its success mainly depends on the performance of the underlying topology. The number of users may grow way beyond the number for which the physical topology was originally designed for, resulting in performance degradation. In such situation, the redesign of network topology is an essential scheme to improve the performance with preservation of the most features of existing network to minimize the redesign cost. In this paper, we present a case study of redesigning network topology and analyzing its performances in terms of bandwidth utilization and loss rate before and after redesign through NS-2. The simulation is employed numerically in evaluate performance of existing network over a time period. Based on the findings, a redesigned topology is proposed to ensure network reliability by retaining or enhancing the network performance. Our simulation results have shown improvement in bandwidth utilization and packet loss rate by 14.08% to 20.62% and 6.91% to 18.40% respectively after redesigning the network topology.