Which control plane protocol is used between Cisco SD-WAN routers and vSmart controllers?

Question

Options

• ATCP
• BOMP
• CUDP
• DBGP

• A
  4% (1)
• B
  93% (25)
• D
  4% (1)

Explanation

OMP (Overlay Management Protocol) is the proprietary Cisco SD-WAN control plane protocol that runs between vEdge/cEdge routers and vSmart controllers, carrying routing information, policies, and crypto key material across the SD-WAN fabric. It operates over a secure DTLS or TLS tunnel and is specifically designed to distribute routes, service chaining data, and application-aware policies within the SD-WAN overlay.

TCP (A) and UDP (C) are transport layer protocols, not control plane routing protocols - while OMP may use TLS (TCP-based) as its underlying transport, TCP and UDP themselves are not the answer to what protocol manages SD-WAN control plane functions. BGP (D) is a traditional WAN routing protocol used in the underlay network to exchange routes between service providers and routers, but it is not responsible for SD-WAN overlay control plane communication between vEdge routers and vSmart.

Memory Tip: Think of OMP = "Overlay Management Protocol" - the word overlay ties directly to SD-WAN's overlay architecture, and management reminds you it handles the control plane (policies, routes, keys). If you remember "SD-WAN speaks OMP to vSmart," you'll never confuse it with BGP (underlay) again.

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