300-415 Question 92
Select 3A large enterprise is deploying Cisco SD-WAN to connect its global sites. The enterprise requires high availability and scalability to handle a growing number of branch locations and ensure redundancy for critical components. Which of the following design considerations should the enterprise implement to meet these requirements?
- A
Deploy redundant vManage, vSmart, and vBond controllers in geographically diverse locations
- B
Configure all branch routers to connect to only one vSmart controller to simplify management
- C
Implement dual WAN connections at each branch site for path redundancy
- D
Use a single data center location to host all SD-WAN controllers to reduce complexity
- E
Enable Bidirectional Forwarding Detection (BFD) for path failure detection and fast failover
Show answer and explanation
Correct answers: A, C, E
Explanation
Scalability and redundancy in Cisco SD-WAN deployments require minimizing single points of failure and ensuring consistent connectivity for all sites. Redundant controllers distributed geographically and dual WAN connections at branch sites are critical. BFD is also essential to quickly detect and recover from path failures. Avoiding single points of failure, such as relying on one controller or hosting all controllers in one data center, is key to achieving these goals.
- A. Correct.
Deploying redundant vManage, vSmart, and vBond controllers in diverse locations ensures high availability and scalability by preventing single points of failure and distributing the load across multiple controllers.
- B. Incorrect.
Connecting all branch routers to only one vSmart controller creates a single point of failure, which goes against redundancy and scalability principles.
- C. Correct.
Dual WAN connections at each branch provide path redundancy, ensuring continued connectivity even if one WAN link fails.
- D. Incorrect.
Using a single data center for all SD-WAN controllers reduces complexity but creates a critical single point of failure, which compromises redundancy and scalability.
- E. Correct.
Enabling BFD ensures quick detection of path failures and facilitates fast failover, contributing to both scalability and redundancy.