What information does OMP distribute from vSmart to edge devices in an SD-WAN fabric?

• A. VPN reachability and routing information
• B. TLS certificates for devices
• C. Edge device firmware updates
• D. User access control lists

Answer: (A)

OMP is the control plane protocol that Cisco SD-WAN uses to manage the overlay. It carries the information that edge devices need to know how to reach resources across the fabric.

Specifically, what vSmart distributes to edge devices through OMP is VPN reachability and routing information. This means the edge learns for each VPN which sites and networks are part of that VPN and what routes are available to reach remote networks. With this data, each edge can populate its per-VPN routing tables and forward traffic to the correct next hops across the SD-WAN fabric. The information includes the presence of VPNs, which sites belong to them, and the actual route advertisements that describe how to reach destinations reachable via other edges.

TLS certificates, firmware updates, and user ACLs aren’t the primary content shared by OMP in the same way. TLS certs are used to secure and authenticate the devices themselves, but they’re provisioned and managed separately from OMP. Firmware updates are delivered through different management mechanisms, not the OMP control messages. ACLs and policy definitions may influence routing decisions, but the essential, fabric-wide data OMP distributes is the VPN reachability and routing information that enables the overlay to function.