Dynamic Load Balancing for Software-Defined Data Center Networks

In recent years, along with the increasing demand for cloud services, the network traffic is increased inside data center networks (DCNs). The inherent defects of TCP/IP network architecture have hindered the development of network technologies for a long time, and the software-defined network (SDN) has recently gained unprecedented attention from industry and research communities, and it has completely overturned the existing network architecture. In this paper, we have proposed a new network frame for software-defined data center network (SDDCN), and developed a dynamic schedule strategy of the network traffic by calculating available path coefficient of the SDDCN, then presented a schedule algorithm for the dynamic load balancing (SDLB) based on the path coefficient of network available bandwidth in real-time, and developed the components of the Ryu controller of the SDDCN, which is responsible for running the SDLB algorithm. Based on Mininet platform, the experimental results show that the SDLB algorithm has better performance of dynamic load balancing in the SDDCN, which has provided an effective solution for the load balancing of the existing DCNs.