A Method of Service Function Chain Configuration to Minimize Computing and Network Resources for VNF Failures

With the increase in network management and operation costs, Network Function Virtualization (NFV) has attracted growing attention from researchers. In virtualized networks, Virtual Network Functions (VNFs) are placed and controlled by a Service Function Chain (SFC). In recent years, VNF failures have had a big impact on provisioning the SFC, and that may cause considerable damage to Network. In particular, there is a possibility of multiple VNF failures at the same time by a single failure of a physical device. In addition, the same type of VM (Virtual Machine) or VNF might cause multiple VNF failures in a geographically dispersed manner since multiple similar VNFs are not able to be provided. This study proposes and evaluates a solution to an SFC configuration problem to ensure sustainability against multiple VNF failures and minimize the cost based on computing and network resource usage through simulation experiments. The proposed method reduce computing resource than the previous study.