300-415 Question 262
Single answerA network administrator is configuring a Cisco SD-WAN network to ensure that critical VoIP traffic receives consistent bandwidth during peak usage times. They also want to prevent non-essential traffic from consuming excessive bandwidth. Which SD-WAN traffic shaping configuration is most appropriate to achieve this goal?
- A
Configure application-aware routing to dynamically switch VoIP traffic to a higher-priority link during congestion.
- B
Implement traffic shaping policies with priority queuing for VoIP traffic and rate limiting for non-essential traffic.
- C
Enable bidirectional Forwarding Detection (BFD) to monitor link performance and adjust traffic flows in real-time.
- D
Use path affinity rules to statically map VoIP traffic to a specific link.
Show answer and explanation
Correct answer: B
Explanation
Traffic shaping is crucial in an SD-WAN environment to manage bandwidth and ensure quality of service (QoS) for critical applications such as VoIP. By configuring traffic shaping policies that prioritize VoIP traffic and rate limit non-essential traffic, the administrator ensures consistent bandwidth availability for critical applications while preventing congestion caused by non-essential traffic.
- A. Incorrect.
Application-aware routing is used to dynamically select the best path for traffic based on performance metrics, but it does not handle traffic shaping or bandwidth allocation.
- B. Correct.
Traffic shaping policies with priority queuing for VoIP ensure that critical traffic gets priority bandwidth, while rate limiting non-essential traffic avoids congestion. This is the correct approach for the scenario.
- C. Incorrect.
BFD monitors link performance and detects failures but does not directly involve traffic shaping or bandwidth management.
- D. Incorrect.
Path affinity rules can pin traffic to a specific link, but this does not address the need for bandwidth allocation or prioritization during congestion.