Abstract
AbstractThe 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.
Highlights
Telecommunication industries across the world are going through a massive transformation phase
This results in the Overlay-SDN model, which cancels the need to replace the Data-plane devices, rather creating a virtual overlay network that connects it to the control plane
We have further proposed a solution to some key issues of SD-WAN with Content Ditribution Network (CDN) as a test case scenario
Summary
The increasing complexity of contemporary mobile and application-centric networks is pushing traditional WAN architectures to its limit. Due to the rise of Cloudbased services and Edge-computing, the inter-site data transfer volume in enterprise networks is rising rapidly. Software-Defined WAN (SDWAN) 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 1 with more managibility, autonomy, and security of the network. We propose a hybrid routing model for multi-controller SD-WANs that computes all-possible routes proactively and serve them on-demand. It results in a rapid convergence across the edge devices. The article further discusses the synchronization mechanism among several controllers and a testbed implementation to conduct the experiments
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