5V0-42.21 · Question #44
An enterprise has deployed a VMware SD-WAN solution with Edges in many different located to different Partner Gateways. Which design makes it possible to have dynamic branch to branch VPN tunnels…
The correct answer is D. Dedicate at least one Gateway as a Controller, and no data plan packets will traverse the. In VMware SD-WAN, designating at least one Gateway as a Controller enables dynamic branch-to-branch (spoke-to-spoke) VPN tunnels by handling the control plane signaling that lets Edges discover each other and negotiate direct tunnels - and critically, zero data plane packets…
Question
An enterprise has deployed a VMware SD-WAN solution with Edges in many different located to different Partner Gateways. Which design makes it possible to have dynamic branch to branch VPN tunnels between any two Edges?
Options
- ADedicated at least one Gateway as a Controller, and few initial data plane packets will travers the
- BAdd Controller role to each Partner Gateway.
- CConfigure each partner Gateway as a Controller.
- DDedicate at least one Gateway as a Controller, and no data plan packets will traverse the
How the community answered
(50 responses)- A8% (4)
- B6% (3)
- C16% (8)
- D70% (35)
Explanation
In VMware SD-WAN, designating at least one Gateway as a Controller enables dynamic branch-to-branch (spoke-to-spoke) VPN tunnels by handling the control plane signaling that lets Edges discover each other and negotiate direct tunnels - and critically, zero data plane packets ever traverse the Controller itself; once the tunnel is brokered, traffic flows directly between Edges.
Why the distractors are wrong:
- A is almost right but fatally wrong on one detail - it claims some initial data packets traverse the Controller, which is false; the Controller is purely control plane
- B and C are structurally wrong - they suggest every Partner Gateway needs the Controller role, but you only need at least one dedicated Controller, not all of them
Memory tip: Think "Controller = Control plane only." It's a matchmaker, not a data mover - it introduces two Edges to each other, then steps aside. If you see an answer option saying data packets (even a few) traverse the Controller, it's a trap.
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