[Video] The Difference Between Overlay and Underlay SDN

Overlay and underlay designs have different unique consequences on the network topography. An overlay network places a selected flow based path at the end points in its software implementations, then it essentially tunnels through the network. On the other hand, underlay networks put a software defined network at every point in your network and it lowers the cost of those intermediate components, which allows you to software to define their operation.

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