With the basic principle of separating control and data planes, software defined networking (SDN) has emerged as a promising paradigm. The separation generates a variety of scaling concerns (e.g., higher reaction time, overhead on the controller). As more nodes are connected in the SDN, the routing process becomes tedious. The traditional reactive method of routing provides dynamic link finding through network state information, which leads to high computation overhead on the SDN controller and low link utilization and throughput. The proactive method in the source path routing method (SPRM) simply provides one backup path for routing. But this is not efficient in handling link failures. Our focus is on reducing the memory overhead caused by link failures in the data and control plane, through the proposed modified source path routing model (SPRM) technique. This method also improves the execution time by making the proactive phase compute k paths and allowing the reactive phase to choose an efficient path from the pre-installed k paths, thereby choosing a backup path which is next best efficient for routing. Our simulation studies show an improvement of 22.5% in link utilization and throughput in the presence of link failures for the proposed method.

凭借分离控制平面和数据平面的基本原则，软件定义网络（SDN）已成为一种有前途的范例。这种分离会产生各种规模问题（例如，更长的反应时间、控制器的开销）。随着SDN中连接的节点越来越多，路由过程变得繁琐。传统的反应式路由方法通过网络状态信息提供动态链路查找，这导致SDN控制器的计算开销较高，链路利用率和吞吐量较低。源路径路由方法(SPRM)中的主动方法只是提供一条备用路径进行路由。但这在处理链路故障方面效率不高。我们的重点是通过提出的修改源路径路由模型（SPRM）技术来减少数据和控制平面中链路故障引起的内存开销。该方法还通过使主动阶段计算 k 条路径并允许反应阶段从预先安装的 k 条路径中选择一条有效路径来提高执行时间，从而选择一条对于路由而言第二高效的备份路径。我们的模拟研究表明，在存在链路故障的情况下，所提出的方法将链路利用率和吞吐量提高了 22.5%。