Software-defined networking (SDN) has evolved as an approach that allows network administrators to program and initialize, control, change and manage networking components (mostly at L2-L3 layers) of the OSI model. SDN is designed to address the programmability shortcomings of traditional networking architectures commonly used in cloud datacenters (CDC). Deployment of SDN solutions have demonstrated significant improvements in areas such as flow optimization and bandwidth allocation in a CDC. However, the benefits are significantly less explored when considering Software-Defined Wide Area Networks (SD-WAN) architectures in the context of delivering solutions by networking multiple CDCs. To support the testing and bench-marking of data-driven applications that rely on data ingestion and processing (e.g., Smart Energy Cloud, Content Delivery Networks) across multiple cloud datacenters, this paper presents the simulator, IoTSim-SDWAN. To the best of our knowledge, IoTSim-SDWAN is the first simulator that facilitates the modeling, simulating, and evaluating of new algorithms, policies, and designs in the context of SD-WAN ecosystems and SDN-enabled multiple cloud datacenters. Finally, IoTSim-SDWAN simulator is evaluated for network performance and energy to illustrate the difference between classical WAN and SD-WAN environments. The obtained results show that SD-WAN surpasses the classical WAN in terms of accelerating traffic flows and reducing power consumption.

软件定义网络（SDN）已经发展成为一种方法，它允许网络管理员对OSI模型的网络组件（主要在L2-L3层）进行编程和初始化，控制，更改和管理。SDN旨在解决云数据中心（CDC）中常用的传统网络体系结构的可编程性缺陷。SDN解决方案的部署已证明在CDC中的流优化和带宽分配等方面有显着改善。但是，在通过将多个CDC联网来交付解决方案的情况下考虑软件定义的广域网（SD-WAN）体系结构时，所获得的收益很少被探索。为了支持依赖数据提取和处理的数据驱动应用程序的测试和基准测试（例如，Smart Energy Cloud，跨多个云数据中心的内容交付网络），本文介绍了模拟器IoTSim-SDWAN。据我们所知，IoTSim-SDWAN是第一个可以在SD-WAN生态系统和支持SDN的多个云数据中心的环境中促进对新算法，策略和设计进行建模，仿真和评估的模拟器。最后，对IoTSim-SDWAN模拟器的网络性能和能耗进行评估，以说明传统WAN和SD-WAN环境之间的差异。获得的结果表明，SD-WAN在加速流量和降低功耗方面超越了传统的WAN。在SD-WAN生态系统和支持SDN的多个云数据中心的环境中评估和评估新算法，策略和设计。最后，对IoTSim-SDWAN模拟器的网络性能和能耗进行评估，以说明传统WAN和SD-WAN环境之间的差异。获得的结果表明，SD-WAN在加速流量和降低功耗方面超越了传统的WAN。在SD-WAN生态系统和支持SDN的多个云数据中心的环境中评估和评估新算法，策略和设计。最后，评估IoTSim-SDWAN模拟器的网络性能和能耗，以说明传统WAN和SD-WAN环境之间的差异。获得的结果表明，SD-WAN在加速流量和降低功耗方面超越了传统的WAN。