LOW-COST NETWORK CONTROL SYSTEM BASED ON SOFTWARE-DEFINED NETWORKING OVER WORLD WIDE WEB USING SINGLE-BOARD COMPUTER

Recently, software-defined networking (SDN) is one of the network virtualization technologies that has attracted significant attention. SDN allows network devices to be controlled centrally and flexibly, allowing for changes to configuration parameters, packet-exchange settings, and quality of service in routing, among other things. Furthermore, SDN reduces network administrators' network management workloads. SDN-enabled network devices, on the other hand, are generally more expensive than legacy network devices, and the total cost is a significant barrier when SDN is deployed in a datacenter, enterprise, and small-scale networks. In this paper, from the viewpoint of the cost and network management workload, we propose a network management and control system based on SDN for Internet protocol (IP) over the world wide web (WWW) using low-cost single-board computers. To validate the work of the proposal system, we designed and constructed a small-scale experimental system that mimicked a part of the proposal system and conducted experiments by using two functions. The experiment result showed that the proposed system worked properly. As a result, using the proposed system can significantly reduce total construction costs when compared to replacing all legacy network devices with SDN-enabled ones. To be more specifically, the total cost of SDN-enabled network devices multiplied by the number of devices can be reduced to the cost of a single Raspberry Pi multiplied by the number of nodes. Furthermore, our proposal system also contributes to reducing the management workload for network administrators and guaranteeing a certain level of security for network devices.