350-401 Question #956: Real Exam Question with Answer & Explanation

Question

Which function is performed by vSmart in the Cisco SD-WAN architecture?

Options

• Aaggregation and distribution of VPN routing information
• Bexecution of localized policies
• Cfacilitation of NAT detection and traversal
• Dredistribution between OMP and other routing protocols

Explanation

vSmart Function in Cisco SD-WAN

vSmart acts as the centralized control plane of the SD-WAN fabric, and one of its core responsibilities is redistributing routing information between OMP (Overlay Management Protocol) and other routing protocols (such as OSPF, BGP, or EIGRP), making Option D correct. This allows vSmart to translate between the SD-WAN overlay routing world and traditional underlay/branch routing environments.

Why the distractors are wrong:

• Option A (aggregation/distribution of VPN routing info) is actually performed by vManage, which serves as the centralized management and orchestration platform for collecting and distributing policy and routing data.
• Option B (execution of localized policies) is the role of the vEdge/WAN Edge routers, which apply data plane policies locally at the branch or hub site.
• Option C (NAT detection and traversal) is handled by the vBond orchestrator, which facilitates initial device authentication and helps establish tunnels through NAT boundaries.

Memory Tip: Think of vSmart as the "smart translator" - it speaks both OMP (the SD-WAN language) and traditional routing protocols, bridging the two worlds. If a function involves control plane translation or policy distribution, think vSmart. If it involves NAT/onboarding, think vBond.

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