Avaliação de estratégias de migração para redes definidas por software

Abstract

Software Defined Network (SDN) has been receiving significative attention by both the academy and industry over the last years. By decoupling the control plane from the data plane, SDN allows the creation of control applications both reactive and dynamic to infrastrucutural events – moreover, it provides a new inovation ecosystem in network infrastructure managing and operation. Although its significant tecnological growth, its deployment in enterprise and campus networks still lacks expressiveness. This slow adoption process of this technology is a direct consequence (i) a full deployment that requires a large investiment, (ii) a gradual deployment that requires the coexistency with legacy tecnologies and (iii) the lackness of a concrete examples of well-known migrations, a reason that also explain that lack of trust on this technology. The objective of this work is to investigate strategies to migrate from a traditional network to a hybrid or full SDN network, through the trade between of traditional to SDN switches. To achieve this, it has been proposed, implemented and tested three different strategies. The first one prioritizes switch which possess the higher degree (number of connections). The second one takes on account one or more parameters (bandwidth, network rush hour or whatever other aspect the operator thinks it is relevant) which are called links’s weight. Finally, the third one prioritizes the network security, prioritizing forwarding devices which are connected to host machines. For each one of the strategies, it was made three tests: (i) latency test; (ii) throughput test; (iii) path length test. Following results, the degree based strategy was the best in the latency tests. But in the throughput test the security based strategy was the best. As a way of presenting a real setting, the Universidades Federal do Pampa (UNIPAMPA) was used as basis for this work.