300-420 Question 234
Select 3An enterprise is deploying Cisco SD-WAN to connect its branch offices, data centers, and cloud applications. The organization requires a highly resilient control plane design and needs to minimize service disruption during WAN Edge device failures. Which of the following design considerations are most critical to meet these requirements?
- A
Deploy multiple vSmart controllers across geographically diverse locations.
- B
Use a single vManage instance to simplify management and configuration.
- C
Enable dual WAN Edge devices at each branch with active-active configuration.
- D
Implement secure DTLS/TLS connections between WAN Edge devices and controllers.
- E
Configure QoS policies to prioritize control plane traffic over the data plane.
Show answer and explanation
Correct answers: A, C, D
Explanation
To achieve a highly resilient Cisco SD-WAN control plane design and minimize service disruption, deploying multiple vSmart controllers in diverse locations ensures redundancy, while dual WAN Edge devices in an active-active configuration provide device-level failover. Additionally, secure DTLS/TLS connections between WAN Edge devices and controllers are critical for maintaining reliable communication across the control plane. These measures collectively enhance system resiliency and reduce downtime during failures.
- A. Correct.
Deploying multiple vSmart controllers in geographically diverse locations ensures redundancy and control plane resiliency in case a controller becomes unavailable.
- B. Incorrect.
Using a single vManage instance creates a single point of failure and does not align with the requirement for high resilience.
- C. Correct.
Enabling dual WAN Edge devices in active-active mode at branches provides device-level redundancy and minimizes service disruption during failures.
- D. Correct.
Secure DTLS/TLS connections between WAN Edge devices and controllers ensure secure and reliable communication, which is critical for maintaining control plane resiliency.
- E. Incorrect.
Although QoS is essential for prioritizing critical traffic, it is not directly tied to minimizing service disruptions during WAN Edge device failures or ensuring control plane resiliency.