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300-415 · Question #303
300-415 Question #303: Real Exam Question with Answer & Explanation
The correct answer is A: VPN0. VPN0, known as the transport VPN, is essential for the SD-WAN control plane as it carries all overlay communication and must be reachable by all WAN Edge devices and controllers.
Architecture
Question
Which service VPN must be reachable from all WAN Edge devices and the controllers?
Options
- AVPN0
- BVPN10
- CVPN15
- DVPN512
Explanation
VPN0, known as the transport VPN, is essential for the SD-WAN control plane as it carries all overlay communication and must be reachable by all WAN Edge devices and controllers.
Common mistakes.
- B. VPN10 is a service VPN used for user or data traffic, and its reachability is subject to specific network design and policies, not a universal requirement for the SD-WAN control plane.
- C. VPN15 is another example of a service VPN for customer data traffic; its reachability is policy-driven and not inherently required for core controller-to-WAN-Edge communication.
- D. VPN512 is the out-of-band management VPN, used for device management, but it does not carry the core control plane traffic that VPN0 does for the SD-WAN overlay functionality.
Concept tested. Cisco SD-WAN VPN types and their roles
Topics
#VPN0#SD-WAN Architecture#Control Plane#Transport VPN
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