300-415 Question 114
Single answerDuring the design of a Cisco SD-WAN deployment, your organization wants to ensure that regional hub sites serve as aggregation points for branch traffic while maintaining optimal connectivity to the data center. Which design consideration is the MOST critical to achieving this goal?
- A
Ensure that the regional hubs are configured as vSmart controllers.
- B
Enable BGP at the regional hub sites to peer with branch sites and the data center.
- C
Leverage hub-and-spoke topology with the regional hubs as the central nodes.
- D
Configure the regional hubs to act as TLOC extensions for the branches.
Show answer and explanation
Correct answer: C
Explanation
To ensure that regional hubs serve as aggregation points for branch traffic while also enabling connectivity to the data center, a hub-and-spoke topology is typically employed. This design ensures that branch traffic is routed through the hubs, which act as the central nodes for connectivity to the data center. Other options, such as configuring vSmart controllers or using TLOC extensions, do not address the primary design consideration for regional hub deployments.
- A. Incorrect.
vSmart controllers are responsible for policy and routing control in the SD-WAN fabric but are not deployed as data aggregation points. Regional hubs should serve as transport aggregation points, not as vSmart controllers.
- B. Incorrect.
BGP is a protocol used for routing between different networks, and while it could play a role in data center and branch connectivity, it is not the primary consideration for achieving a regional hub design.
- C. Correct.
A hub-and-spoke topology ensures that regional hubs act as aggregation points for branch traffic, enabling centralized connectivity to the data center while maintaining optimal routing and control.
- D. Incorrect.
TLOC extensions are used to extend WAN connectivity between devices, but they are not the primary mechanism for designing regional hub-and-branch connectivity for data center aggregation.