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350-401 Practice Question: Which two statements about Cisco SD-WAN overlay…
Which two statements about Cisco SD-WAN overlay routing and OMP are true? (Choose two.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
OMP (Overlay Management Protocol) is used to exchange routing, policy, and service information between vSmart controllers and vEdge routers.
OMP is the protocol used to exchange routing and service information between vSmart and vEdge devices. It supports both IPv4 and IPv6 prefixes. OMP does not run between vEdge routers directly; it is a client-server protocol with vSmart as the server. OMP routes are not redistributed into BGP by default; redistribution must be configured. OMP uses TCP port 12346, not UDP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
OMP (Overlay Management Protocol) is used to exchange routing, policy, and service information between vSmart controllers and vEdge routers.
Why this is correct
Correct because OMP is the protocol that carries routes, TLOCs, and service chaining information between the control plane (vSmart) and data plane (vEdge).
- ✓
OMP supports both IPv4 and IPv6 prefix advertisements within the SD-WAN overlay.
Why this is correct
Correct because OMP can carry both IPv4 and IPv6 routes, allowing dual-stack operation in the overlay.
- ✗
OMP runs directly between vEdge routers to establish a full mesh of routing adjacencies.
Why it's wrong here
Incorrect because OMP is a client-server protocol; vEdge routers only communicate with vSmart controllers, not directly with each other.
- ✗
OMP routes are automatically redistributed into the local BGP process on the vEdge router.
Why it's wrong here
Incorrect because redistribution between OMP and BGP must be explicitly configured using route policies; it is not automatic.
- ✗
OMP uses UDP port 12346 for communication between vSmart and vEdge devices.
Why it's wrong here
Incorrect because OMP uses TCP port 12346, not UDP, to ensure reliable delivery of routing information.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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