300-415 Question 267
Single answerAn enterprise is using Cisco SD-WAN to manage its network traffic. To ensure fair usage of bandwidth across multiple applications, the administrator decides to implement traffic policing. Which configuration step is essential to enforce traffic policing on a specific application flow within the Cisco SD-WAN solution?
- A
Define a QoS policy with a policer for the application and apply it to the data policy.
- B
Configure an ACL to match the application traffic and apply it directly to the WAN interface.
- C
Apply a policer directly to the WAN Edge device without defining a QoS policy.
- D
Define a centralized policy with an application-aware routing rule and enable rate-limiting.
Show answer and explanation
Correct answer: A
Explanation
Traffic policing in Cisco SD-WAN is achieved by creating a QoS policy that defines a policer for the target application. This QoS policy is then applied to a data policy to enforce the configured rate limits on specific application flows. Other options like ACLs or centralized application-aware routing are not designed for policing traffic.
- A. Correct.
Correct. In Cisco SD-WAN, traffic policing is implemented by defining a QoS policy with a policer and applying it to a data policy. This ensures that the specific application flow adheres to the configured rate limits.
- B. Incorrect.
Incorrect. ACLs are used for traffic filtering and do not directly support traffic policing. They are not the correct mechanism for enforcing bandwidth policies.
- C. Incorrect.
Incorrect. Policing cannot be applied directly to a WAN Edge device without a QoS policy. Cisco SD-WAN requires policies to define traffic handling behavior.
- D. Incorrect.
Incorrect. While centralized policies with application-aware routing can control traffic paths, they do not enforce policing or rate-limiting directly.