Um protocolo de eleição tolerante a falhas e instabilidades para controladores SDN

Abstract

Software Defined Networks provide an overview of the network with greater management flexibility. However, it ends up making the controller a single point of failure and also susceptible to Distributed Denial of Service (DDoS) attacks, which can compromise communication between network devices. In the literature, there are efforts to improve fault tolerance caused by denial-ofservice attacks on SDNs and also to improve the election process. However the form they are implemented consumes a large amount of network resource consumption. This work presents a Fault Tolerant and Instability Protocol for SDN Controllers with the objective of maintaining the stability of the network even with faulty controllers. This proposal consumes a low number of messages exchanges both to elect and to reestablish leadership structures. The protocol was developed and evaluated using the POX Controller, OpenFlow Switch, Mininet and the Cbench. The results obtained show the efficacy of the protocol.