300-415 Question 119
Single answerAn enterprise has deployed Cisco SD-WAN with multiple vEdge devices across branch offices. The IT team wants to ensure that high-priority application traffic, such as VoIP, takes the most optimal path across the network while minimizing packet loss. Which configuration is required on the Cisco SD-WAN data plane to achieve this?
- A
Configure application-aware routing policies to dynamically select the best path based on SLA metrics.
- B
Enable BFD (Bidirectional Forwarding Detection) on all transport interfaces to detect link failures.
- C
Use static routing policies to manually assign paths for high-priority traffic.
- D
Configure a centralized control policy to prioritize application traffic at the vSmart level.
Show answer and explanation
Correct answer: A
Explanation
To ensure high-priority applications such as VoIP take the optimal path, Cisco SD-WAN uses application-aware routing. This feature evaluates real-time SLA metrics (latency, jitter, and packet loss) and dynamically selects the best path for traffic. Other options like BFD and static routing are insufficient for dynamic optimization, and centralized control policies are not designed for this purpose.
- A. Correct.
Correct. Application-aware routing dynamically evaluates SLA metrics such as latency, jitter, and loss, and chooses the most optimal path for high-priority traffic like VoIP.
- B. Incorrect.
Incorrect. While BFD provides fast failure detection and helps maintain SD-WAN tunnels, it does not dynamically optimize traffic paths based on SLA metrics.
- C. Incorrect.
Incorrect. Static routing does not consider real-time network conditions and does not provide dynamic path optimization for high-priority traffic.
- D. Incorrect.
Incorrect. A centralized control policy on vSmart is used for distributing routing and security policies, but it does not handle dynamic path selection based on SLA metrics.