Proposal of Multi-Pathization Method of UDP with SDN for NFS

Abstract

This paper proposes a novel method of UDP multi-pathization with SDN for NFS. Although current UDP protocol, which is one of the transport layer protocol of NFS, cannot handle multiple paths simultaneously, the proposed method can multi-pathize UDP by utilizing SDN without any changes of current TCP/IP protocols. The method distributes packets over multiple paths according to the congestion of the paths and the length of IP packets. Since the control is performed on SDN, no changes of existing protocols, softwares, and devices are required. The authors implemented their method by using OpenFlow and IoT devices, Raspberry Pi 3 as SDN protocols and IoT devices, respectively; they then confirmed the effectiveness of the proposed method by actual experiments.