Proposta de metodologia para o emprego otimizado da redundância em busca da alta disponibilidade e da máxima confiabilidade em redes

Abstract

Show the necessity of have a high level of availability and trustworthy in a local area network service and how to reach that aim using redundancy. At this way, is exposed a technical orientation that will permit to elaborate a support tool for the redundancy application called Planilha de Prioridades de SPOF (Single Point of Failure) - Table of SPOF Priority (PPS). The proposal is use the PPS for consultation and to support the decision making of where, how and how much is to rationally apply the redundancy resource and then contribute to moderate the negative results that can be provoked by SPOF. In PPS are defined, for each identified SPOF: the Risks that the failure of SPOF represents; the Priority of elimination; the Availability of the component, considering MTBF (Mean Time Between Failures) and MTTR (Mean Time To Recover); and the Action Lines that are alternatives to apply redundancy resource, in order to reduce risks or to eliminate then. The Action Lines will be preferentially simulated and tested, from the less complex to the most, in order to enable the valuation results, cost estimation and registration in the PPS. Initially, some important conceptions and definitions are mentioned in Theoretician Referential, because their comprehension is interesting to accompany the applied reasoning. Considering the opportunity, is demonstrate the practical relationship among the subject and QoS. Some important redundancy resource application technics, nowadays commercial used, are shown. In Research Methodology the phases to construct PPS are defined. After that, in Case Description, a model of network installation is described, this model will be evaluate in the next chapter, in order to elaborate the PPS. Therefore, is appreciate the possibility of, with appropriation of the redundancy resource to the PPS necessities, optimize the search of a maximum trustworthy and high availability network.