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  Cisco SD-WAN Overlay Management Protocol (OMP): A Comprehensive Guide Cisco SD-WAN Overlay Management Protocol (OMP): A Comprehensive Guide Cisco SD-WAN has revolutionized modern networking by offering scalable and intelligent network management solutions. A key component that drives the Cisco SD-WAN architecture is the Overlay Management Protocol (OMP) . This protocol plays a crucial role in establishing and maintaining the SD-WAN control plane, ensuring seamless communication across the network. What is OMP in Cisco SD-WAN? OMP is a TCP-based protocol, much like BGP, that enables communication between Cisco vEdge routers and vSmart controllers. It is responsible for managing the following critical functions: Transport Locator (TLOC) Distribution: Shares TLOC information across SD-WAN sites. Helps in route reachability by defining WAN transport characteristics. Service-Side Reachability: Distributes routing information from local interfaces, static routes, and dynamic protocols ...