Network Recovery Optimization in SDN

Software-Defined Networking (SDN) introduces a centralized and flexible approach to network management, enabling dynamic traffic control and improved scalability. However, fault tolerance remains a critical challenge, as traditional failure recovery mechanisms often suffer from slow convergence and inefficient path selection, leading to significant packet loss and increased latency.This paper explores the effectiveness of various Fast Reroute (FRR) mechanisms in SDN environments, focusing on their impact on failure recovery times and network stability. Through extensive simulations, we demonstrate the limitations of existing solutions and highlight the necessity of integrating pre-computed backup paths to reduce service disruptions. Our findings indicate that without FRR mechanisms, packet loss exceeds 50% during multiple link failures, which is an unacceptable outcome for real-world deployments.