ReMon: A Resilient Flow Monitoring Framework

Network measurement and monitoring are essential for learning the current network state and act accordingly. Recent trends in network programmability and the Software-Defined Networking (SDN) architecture make measurement and monitoring more flexible and dynamic. However, monitoring tools may suffer from reduced accuracy when collecting measurement data in the presence of link failures. Therefore, in this paper, we propose a resilient monitoring framework, called ReMon, that can efficiently recover from link failures. ReMon combines active measurement along with state aggregation at the data plane switches to furthermore improve the measurement cost. We evaluate its performance in Mininet considering two real-world network topologies. The results confirm that ReMon can provide timely and accurate measurements even in the presence of link failures. It furthermore reduces 50% link failure recovery time compared to its counterparts.