Which SD-WAN Plane is responsible for managing the rules for routing traffic through the overlay network?

The Control Plane in an SD-WAN architecture is tasked with managing the rules that dictate how traffic is routed through the overlay network. This plane is crucial as it exchanges routing and policy information among the devices within the network, allowing them to make dynamic decisions based on current network conditions, application requirements, and business policies.

By constantly monitoring the network, the Control Plane ensures that traffic is efficiently routed through the best available paths, adapting to changes due to link failures or variations in performance. It effectively acts as the brain of the SD-WAN, maintaining visibility over the entire overlay network and adjusting traffic flows to optimize performance.

The other planes serve different purposes: the Data Plane handles the actual transmission of user data across the network, while the Management Plane focuses on the configuration and management of the network devices. The Orchestration Plane, although not explicitly mentioned in the question, assists with network-wide policies and automation. However, it is the Control Plane specifically that governs the routing rules necessary for traffic management in the SD-WAN environment.