Cisco
300-415 · Question #193
300-415 Question #193: Real Exam Question with Answer & Explanation
The correct answer is D: Public and services subnets are required in VNet. The Microsoft underlay cloud fabric performs the management function.. A Cisco SD-WAN WAN Edge device in an Azure VNet requires a minimum of two subnets: one for public (WAN) connectivity and one for services (internal network).
WAN Edge Router Deployment
Question
How many subnets are necessary in Azure VNet for a WAN Edge device to function in the cloud deployment?
Options
- AOne
- BThere must be three subnets in VNet: management, public, and services.
- COne public subnet is required in VNet. The Microsoft underlay cloud fabric performs all of the routing functions for WAN Edge.
- DPublic and services subnets are required in VNet. The Microsoft underlay cloud fabric performs the management function.
Explanation
A Cisco SD-WAN WAN Edge device in an Azure VNet requires a minimum of two subnets: one for public (WAN) connectivity and one for services (internal network).
Common mistakes.
- A. A single subnet is insufficient for a WAN Edge device because it needs distinct network segments for its external WAN connectivity and its internal service-side connectivity within the VNet.
- B. While a separate management subnet can be created, it is not strictly a mandatory requirement for 'three subnets', as often management traffic is handled via the public or service interfaces or the cloud management plane.
- C. While a public subnet is required, the statement that 'Microsoft underlay cloud fabric performs all of the routing functions' is incorrect; the WAN Edge device itself performs overlay routing, and it requires a service-side interface/subnet to connect to the internal virtual network.
Concept tested. Cisco SD-WAN WAN Edge cloud deployment subnets
Topics
#WAN Edge Cloud Deployment#Azure VNet#Subnet Requirements#SD-WAN Architecture
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