300-415 Question 177
Single answerAn enterprise has implemented Cisco SD-WAN in its network. The IT team is tasked with ensuring that traffic from a specific group of applications is sent through the MPLS transport, while all other traffic utilizes the broadband transport. Which configuration step should the IT team take to achieve this using a data policy?
- A
Create a centralized control policy and apply it to the outbound direction of the vSmart controller.
- B
Define a centralized data policy that matches the specific applications and sets the preferred MPLS transport.
- C
Configure a localized data policy on each vEdge router to match the applications and set the MPLS path.
- D
Use an application-aware routing policy to prioritize the applications over MPLS transport.
Show answer and explanation
Correct answer: B
Explanation
To ensure traffic from specific applications is sent over MPLS while other traffic uses broadband, a centralized data policy must be used. Centralized data policies are configured at the vSmart controller and applied across the SD-WAN fabric, allowing for scalable and consistent traffic management based on application matching. This approach is more effective and manageable than localized policies or control policies in such scenarios.
- A. Incorrect.
A centralized control policy is used for controlling routing advertisements and does not handle traffic forwarding decisions based on data flows, making it unsuitable for this task.
- B. Correct.
A centralized data policy allows matching specific applications and defining the preferred transport (MPLS in this case), which is the correct way to implement this requirement.
- C. Incorrect.
Localized data policies are configured on individual vEdge routers, but they are not scalable for managing application-based transport preferences across the entire SD-WAN fabric.
- D. Incorrect.
Application-aware routing policies are used to influence path selection based on SLA metrics rather than explicitly defining transport for specific applications.