Which control plane protocol is used between Cisco SD-WAN routers and vSmart controllers?
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The control plane protocol used between Cisco SD-WAN routers and vSmart controllers is OMP (Overlay Management Protocol). OMP is a proprietary protocol that is used by Cisco's SD-WAN solution to communicate control plane information between SD-WAN routers and vSmart controllers.
The vSmart controller acts as the centralized brain of the SD-WAN solution and is responsible for making policy decisions and distributing them to the SD-WAN routers. The SD-WAN routers, in turn, use OMP to communicate information such as network topology, reachability information, and policy information to the vSmart controller. This information is used by the vSmart controller to make decisions about how to steer traffic across the SD-WAN fabric.
OMP is a lightweight, efficient protocol that is designed to operate over unreliable network connections, such as the public internet. It uses a message-based approach to communication, with each message containing a set of attributes that describe a specific aspect of the SD-WAN fabric. OMP messages are exchanged between the SD-WAN routers and the vSmart controller using UDP (User Datagram Protocol), which is a connectionless protocol that provides low-overhead, best-effort delivery of data.
In summary, OMP is the control plane protocol used by Cisco SD-WAN routers to communicate with vSmart controllers. It is a lightweight, efficient protocol that operates over UDP and is designed to provide reliable communication over unreliable network connections.