300-415 Question 26
Single answerAn enterprise network is deploying Cisco SD-WAN and needs to ensure that branch devices can exchange routing information with each other dynamically. They have configured vSmart controllers and added all branch devices to the overlay network. Which characteristic of vRoute in Cisco SD-WAN ensures dynamic routing between branch devices?
- A
vRoute uses OSPF to directly exchange routing information between branch devices.
- B
vRoute acts as a centralized routing table on the vSmart controller to distribute routes to branch devices.
- C
vRoute requires manual configuration of static routes on each branch device for communication.
- D
vRoute dynamically learns and advertises routes through BGP sessions established on branch devices.
Show answer and explanation
Correct answer: B
Explanation
vRoute in Cisco SD-WAN is a centralized routing table managed by the vSmart controller. It dynamically learns routes from the network and distributes them to all devices in the overlay network, ensuring seamless communication between branch devices without requiring direct protocol sessions like OSPF or BGP between them.
- A. Incorrect.
This is incorrect because vRoute does not use OSPF to directly exchange routing information between branch devices. vSmart acts as the central control mechanism for routing information.
- B. Correct.
This is correct. vRoute is a centralized routing table maintained on the vSmart controller, which dynamically learns, stores, and distributes routes to all branch devices in the overlay network.
- C. Incorrect.
This is incorrect because vRoute eliminates the need for manual static route configuration by dynamically distributing routing information.
- D. Incorrect.
This is incorrect because vRoute does not rely on BGP sessions established on branch devices for dynamic route learning and distribution. Instead, it uses the vSmart controller for centralized route management.