A Path Allocation Method Based on Source Routing in SDN Traffic Engineering

SDN traffic engineering plays an important role in today's Internet, cloud computing and sensor network. Source routing combined with SDN traffic engineering has broad application prospects. There are two processing procedures of SDN traffic engineering when building a model, the difference of them is whether to list all candidate paths firstly or not. In order to make the traffic engineering achieves the best results, for a source-destination pair, the form of the solution of general SDN traffic engineering model is the load on each link in the network. However, based on this form of the solution, we cannot configure source routing directly. In this paper, we propose the problem of path allocation based on source routing that helps to deploy source routing configuration at the source node. We model and analyze this problem, then a relatively simplified method that obtains forwarding paths sequentially is proposed. The evaluation results indicate that the proposed method can address this problem effectively, and can meet traffic demands as much as possible by using source routing. In addition, the favorable effects of the combination of source routing and SDN are also verified.