In Cisco SD-WAN, which component distributes TLOC routes and OMP updates between WAN Edge routers?

• A. WAN Edge
• B. vSmart
• C. vManage
• D. vBond

Answer: (B)

This question tests which component handles the SD-WAN control plane responsibilities of distributing overlay information between WAN Edge routers. In Cisco SD-WAN, TLOC routes carry the transport and locator information that edges use to form the overlay, while OMP (Overlay Management Protocol) updates carry routing and policy data across the fabric. The vSmart controller runs the control plane that exchanges these updates and distributes TLOC information to all WAN Edges, enabling them to discover neighbors, learn reachability, and apply policies. Without vSmart, edges wouldn’t receive the necessary overlay routes or OMP messages to build and maintain the mesh.

WAN Edge devices are the data-plane endpoints that forward user traffic and run tunnels, so they don’t distribute OMP or TLOC updates themselves. vManage provides configuration and telemetry, not the overlay routing distribution. vBond handles initial bootstrap and authentication to bring edges into the SD-WAN fabric, but it’s the vSmart component that propagates the overlay control information.