300-420 Question 232
Select 3An enterprise is deploying Cisco SD-WAN across its global network. The design needs to ensure that the control plane remains highly available, the data plane is resilient, and the network can scale to accommodate future growth. Which of the following design considerations should be implemented to meet these requirements?
- A
Deploy redundant vSmart controllers in geographically dispersed locations.
- B
Use a single vBond orchestrator to simplify control plane operations.
- C
Implement TLOC extensions for critical sites to provide data plane redundancy.
- D
Configure QoS policies on vSmart to prioritize control plane traffic.
- E
Design the overlay network with dual transport links for each site.
Show answer and explanation
Correct answers: A, C, E
Explanation
Cisco SD-WAN design requires careful consideration of control plane high availability, data plane redundancy, and scalability. Redundant vSmart controllers ensure the control plane remains operational even during outages. TLOC extensions enhance data plane resilience by leveraging multiple transport links. Dual transport links per site enable both redundancy and scalability, supporting the enterprise's growing network demands.
- A. Correct.
Deploying redundant vSmart controllers in geographically dispersed locations ensures control plane high availability and prevents a single point of failure across the SD-WAN fabric.
- B. Incorrect.
Using a single vBond orchestrator creates a single point of failure, which is not suitable for a highly available SD-WAN design. Redundant vBond orchestrators should be deployed instead.
- C. Correct.
TLOC extensions enable data plane redundancy by allowing multiple transport links to be used, ensuring site connectivity even in case of a failure.
- D. Incorrect.
QoS policies on vSmart do not prioritize control plane traffic. QoS should be applied at the edge nodes to optimize application traffic flowing through the data plane.
- E. Correct.
Designing the overlay network with dual transport links for each site provides scalability and redundancy, ensuring the network can sustain transport failures and future growth.