A centralized hybrid routing model for multicontroller SD-WANs,Transactions on Emerging Telecommunications Technologies

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A centralized hybrid routing model for multicontroller SD-WANs
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2021-05-11 , DOI: 10.1002/ett.4252
Saptarshi Ghosh ₁ , Muddesar Iqbal ₁ , Tasos Dagiuklas ₁

Affiliation

The increasing complexity of contemporary mobile and application-centric networks is pushing traditional WAN architectures to its limit. Due to the rise of Cloud-based services and edge-computing, the intersite data transfer volume in enterprise networks is rising rapidly. Moreover, enterprises are tending to integrate several communication technologies such as broadband, LTE, MPLS, and so forth for a high-available dynamic WAN connectivity, which a traditional WAN does not support natively. Additionally, its distributed computing model results in the control-plane traffic to consume a significant amount of backhaul bandwidth. Software-defined WAN (SD-WAN) is a generation shift that adapts the centralized model of SDN to WAN that fills the bottlenecks of its predecessor. It provides over twice the bandwidth having the same backhaul with more manageability, autonomy, and security of the network. In this article, we propose a hybrid routing model for multicontroller SD-WANs that computes all-possible routes proactively and serve them on-demand. The proposed model results in a rapid convergence across the edge devices. The article further discusses the synchronization mechanism among several controllers and a test-bed implementation to conduct the experiments.

中文翻译：

用于多控制器 SD-WAN 的集中式混合路由模型

当代移动和以应用为中心的网络日益复杂，正将传统 WAN 架构推向极限。由于基于云的服务和边缘计算的兴起，企业网络中站点间的数据传输量正在迅速上升。此外，企业倾向于集成多种通信技术，例如宽带、LTE、MPLS 等，以实现高可用的动态 WAN 连接，而传统 WAN 本身并不支持这些技术。此外，其分布式计算模型导致控制平面流量消耗大量回程带宽。软件定义广域网 (SD-WAN) 是一种代际转换，它将 SDN 的集中式模型应用于 WAN，填补了其前身的瓶颈。它在具有相同回程的情况下提供两倍以上的带宽，并具有更高的网络可管理性、自主性和安全性。在本文中，我们为多控制器 SD-WAN 提出了一种混合路由模型，该模型可主动计算所有可能的路由并按需为其提供服务。所提出的模型导致跨边缘设备的快速收敛。本文进一步讨论了几个控制器之间的同步机制和一个用于进行实验的试验台实现。

更新日期：2021-06-14

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