300-415 Question 43
Single answerAn organization has deployed a Cisco SD-WAN multi-region fabric to scale its network and improve performance. The network has two regions: Region 1 and Region 2. The IT team needs to optimize inter-regional traffic while ensuring redundancy and avoiding a single point of failure. Which design consideration is most appropriate for inter-region communication?
- A
Deploy a single vSmart controller that manages policies for both regions.
- B
Use regionally dedicated vSmart controllers and configure a mesh of TLOC extensions between regions.
- C
Configure vSmart controllers in both regions and define inter-region policies using OMP route redistribution.
- D
Use only regional direct tunnels (SD-WAN IPsec) for inter-region communication.
Show answer and explanation
Correct answer: C
Explanation
In a Cisco SD-WAN multi-region fabric, the use of regionally distributed vSmart controllers with inter-region policies defined through OMP route redistribution ensures optimal scalability, redundancy, and central policy enforcement. This approach avoids single points of failure and supports efficient inter-region communication.
- A. Incorrect.
This option creates a single point of failure since the vSmart controller is centralized and not regionally distributed. This is not recommended in a multi-region design.
- B. Incorrect.
While TLOC extensions can allow traffic to traverse between regions, this approach is inefficient for large-scale deployments as it increases complexity and does not leverage centralized policy control through vSmart.
- C. Correct.
This is the correct answer. Configuring vSmart controllers in both regions ensures redundancy, while inter-region policies with OMP route redistribution enable efficient and scalable traffic management between regions.
- D. Incorrect.
This option is incorrect because relying solely on regional direct tunnels ignores the advantages of centralized policy control and may not provide optimal scalability or redundancy.