Cisco 350-401: Cisco SD-WAN Control and Data Planes

Cisco Catalyst SD-WAN separates the decisions that build the overlay from the packets that applications actually send. That separation is the key to understanding the architecture.

When engineers blur those roles together, troubleshooting becomes a sequence of guesses because a healthy management dashboard can coexist with a broken control connection or a data-plane path problem. For enterprise network engineers, the practical model is to isolate planes deliberately.