The Overlay Management Protocol (OMP) is the protocol responsible for establishing and maintaining the Cisco SD-WAN control plane. It provides the following services:
OMP is the control protocol that is used to exchange routing, policy, and management information between the vSmart controllers and vEdge routers in the overlay network. It is enabled by default, so after you start up the vSmart controllers and vEdge routers, it is not necessary to explicitly configure or enable OMP. These devices automatically initiate OMP peering sessions between themselves, and the two IP end points of the OMP session are the system IP addresses of the two devices.
Traffic Flow:
Service routes orginated from vEdges/vSmarts