What Is An SD-WAN Controller?

SD-WAN is a new networking technology that provides intelligent routing of data packets across the network. It brings both security and control features to the table. The SD-WAN controllers are responsible for keeping SD-WAN networks up, running, and functioning properly. They do this by estimating bandwidth needs and maintaining a backup plan in case of link failure.

A controller is a specialized computer that has been designated to manage the operation of a specific set of devices within a network. To provide redundant and reliable service, and SD-WAN controller must be capable of deploying over several points in the network. In addition, it should also be capable of maintaining connectivity to all points in the network.

What are SD-WAN Controllers used for?

SD-WAN Controllers are used in the management of SD-WAN networks. The aggregate data from network elements and present it to an administrator in an intuitive interface. They are often installed where the primary WAN links or branch offices exist, which is typically much closer to the network than centralized servers. This approach delivers SD-WAN benefits while improving security and resiliency by reducing reliance on centralized servers.

SD-WAN controllers are a key component in SD-WAN networks. They provide the control plane, which includes configuration and management of the network and performance monitoring. SD-WAN Controllers (or software) use one of two methods to make sure that SD-WAN is always available:

  • Network availability is monitored through packet loss and latency.
  • Network availability is monitored by looking at the number of active connections on each link.

SD-WAN controllers are used to control the connection of multiple branches. They are usually deployed in SD-WAN deployments to manage the network centrally. They are used for centralized management of branch networks which consist of VPNs, MPLS, Ethernet, 4G LTE, and mesh Wi-Fi connections. They provide a unified user interface that is also customizable through dashboard configuration tools.

How does an SD-WAN Controller work?

SD-WAN is software that controls the different features, much like how a router does. The SD-WAN controller is used to look at the traffic and decide which path to use. The SD-WAN Controller monitors the traffic coming into the network and decides where it should go based on policy or other considerations.

An SD-WAN Controller is a software-based controller installed on a server in your organization. It provides centralized visibility and control over the SD-WAN solution, including network connectivity monitoring, application performance management, and business process automation. This device typically resides in your company headquarters or data center. It can also reside at an internet service provider (ISP) Point of Presence (PoP).

It does not require any hardware installation or configuration. You can install it in minutes without IT resources or help from third parties. The sd wan controller is the central point of the network. It is responsible for managing all communication between remote sites, even through multiple networks.

The controller provides an interface for configuring and monitoring the network. You can also use it to remotely connect or disconnect access points, manage site-to-site communication, manage bandwidth allocation, and monitor connections.