Uma análise comparativa entre paradigmas de virtualização de redes

• Autor(a) principal: Marchesan, Gabriel
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do UFSM
• Texto Completo: http://repositorio.ufsm.br/handle/1/14521
• topic: SDN; NFV; Virtualização; Funções de rede; SDN; NFV; Virtualization; Network functions; CNPQ::CIENCIAS EXATAS E DA TERRA::CIENCIA DA COMPUTACAO

New technologies in the area of computer networks have been gaining greater attention from academia and industry, such as Software Defined Networking (SDN) and Network Function Virtualization (NFV). While SDN arose to make networks more programmable and flexible, the NFV paradigm has emerged with the primary goal of making network functions more scalable. Also, with virtualized network functions performed on generic devices, NFV enables expressive reduction of capital costs (CAPEX) and operations (OPEX). In this perspective, although network functions are implemented in both paradigms, the literature lacks in a deeper analysis of which network functions are more adequate to be executed in a given paradigm. In addition, in which scenarios and situations would it be more advantageous and appropriate to use an SDN or NFV paradigms to implement a particular network function. In this sense, this work presents a study on networks virtualization where it is observed which paradigm presents a better support to the needs of a given network function. To achieve this goal, the firewall, switching, routing and dhcp-server functions were implemented and tested in both technologies. There should be emphasized that the present research differs from the other works available in the literature, since its main contribution is a deeper analysis of the qualitative and quantitative aspects of the functions of networks running in SDN and NFV paradigms. Analyzing the results obtained with the accomplishment of this work, it is noticed that the NFV paradigm is more suitable for the implementation of functions of the application category. For interoperability functions, SDN encompasses a more theoretical / practical basis, and therefore is understood to be the most adequate in this scenario. Regarding the implementation of functions that belong to the optimisation and monitoring / control categories, it is noted that the SDN and NFV paradigms can be substituted for each other, since they obtained similar results. As for the protection functions, it is verified that NFV obtained better results, therefore it is more advantageous and effective the implementation of functions of this category in this paradigm. Furthermore, the research results show that there is no single technology to implement a particular network function. From this perspective, it is understood that both paradigms can be applied to implement network functions belonging to different categories.