Backup-resource based failure recovery approach in SDN data plane

摘要: Software Defined Networking (SDN) enables the underlying infrastructure to be abstracted from network services and controlled by one or more controllers. If a link node fails, switches that can detect failure have either inform controller update flow tables transform data pre-configured paths recover failure. However, existing recovery approaches mainly consider delay packet loss, ignore storage resources consumption for backup in case of Moreover, Ternary Content Addressable Memory (TCAM) stores entries is expensive limited with high-energy consumption. Thus order minimize meet required delay, backup-resource based approach proposed. Two metrics are proposed grade physical links, three kinds strategies different graded links provided, on which tries use less meets while guaranteeing reliability network. Simulations show as possible ensure performance satisfy important traffic at same time. has good steady networks scales connectivity.