Implementação de rotas de backup e HSRP visando tolerância à falha de equipamento da camada de rede ou meio físico

Abstract

The present work presents a fault tolerance solution in the network layer to achieve high availability. A complete mesh network interconnection was designed between four locations, connecting all nodes to each other. With this information can travel through more than one path, offering redundancy. After interconnecting the mesh network, the edge equipment of network will need to learn which paths they could use, to reach remote networks and adapt it selfie, if any path becomes unavailable. To meet this need the dynamic routing protocol OSPF was used, it uses an efficient algorithm to decide the best path to reach the destination network. This protocol adapts it selfie due topology changes caused by unavailability of the physical environment. To ensure that customers’ computers are always connected to the external network via their default gateway, the HSRP protocol was implemented, where there is more than one device that capable to forward packets outside the local network. The HSRP protocol, in addition to offering redundancy, is capable to monitor other interfaces and making other equipment as the default gateway of the internal network, in case any interface fails. A double stack was used in the network implementation, allowing customers’ equipment and computers to travel using the IPv4 and IPv6 protocols. The set of network interconnection performed, the OSPF and HSRP protocols a resilient network when there is a failure of both the physical environment and some edge equipment.