Which Cisco SD-WAN overlay routing protocol exchanges routes and policy information between controllers and edge devices?

• A. OMP
• B. OSPF
• C. BGP
• D. EIGRP

Answer: (A)

OMP, or Overlay Management Protocol, is the protocol Cisco SD-WAN uses to share routes and policy data between the controllers and edge devices. It carries the routing information for the SD-WAN overlay (the VPN prefixes and next-hops) along with the policy details that govern how traffic should be steered across the fabric. This protocol sits specifically in the control plane of the SD-WAN overlay, between vSmart controllers and vEdge devices, enabling coordinated routing and policy distribution across the entire network.

Traditional routing protocols like OSPF, BGP, and EIGRP operate within conventional networks and do not handle the overlay-specific route distribution and policy exchange required by the SD-WAN fabric.