Which Cisco SD-WAN overlay protocol advertises routes, policies, and TLOC reachability between edge devices and controllers?

Study for the CCNP Software-Defined Wide Area Network (SD-WAN) Exam. Master key concepts with flashcards and multiple choice questions, each complete with hints and explanations. Gear up to ace your exam!

Multiple Choice

Which Cisco SD-WAN overlay protocol advertises routes, policies, and TLOC reachability between edge devices and controllers?

Explanation:
The question tests understanding of the overlay control plane used in Cisco SD-WAN. The Overlay Management Protocol is the mechanism that distributes the overlay’s routes, the policies that dictate how traffic should be steered, and the TLOC (Transport Locator) reachability information between edge devices and controllers. This protocol enables edge devices to learn remote destinations, apply centralized policies, and know which WAN links are available for the SD-WAN fabric. In contrast, traditional routing protocols like BGP, OSPF, and IS-IS serve the underlay for basic IP reachability and do not carry the SD-WAN overlay’s route advertisements, policies, or TLOC reachability.

The question tests understanding of the overlay control plane used in Cisco SD-WAN. The Overlay Management Protocol is the mechanism that distributes the overlay’s routes, the policies that dictate how traffic should be steered, and the TLOC (Transport Locator) reachability information between edge devices and controllers. This protocol enables edge devices to learn remote destinations, apply centralized policies, and know which WAN links are available for the SD-WAN fabric. In contrast, traditional routing protocols like BGP, OSPF, and IS-IS serve the underlay for basic IP reachability and do not carry the SD-WAN overlay’s route advertisements, policies, or TLOC reachability.

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