300-415 Question 135
Single answerAn organization is deploying Cisco SD-WAN and needs to configure OMP in their network. The network administrator wants to ensure that service-side routes are advertised to the overlay network, but also wants to restrict the advertisement of default routes. Which configuration step is necessary to meet this requirement?
- A
Enable OMP and explicitly configure a route policy to filter default routes.
- B
Disable OMP on the vEdge routers to prevent default route advertisements.
- C
Use the 'advertise default' command under OMP configuration to block default routes.
- D
Configure the 'no default-route' option in OMP to restrict default route advertisements.
Show answer and explanation
Correct answer: A
Explanation
To control route advertisements in Cisco SD-WAN, OMP relies on route policies. By creating and applying a route policy to filter default routes, the administrator can ensure that only the desired routes, such as service-side routes, are advertised to the overlay network. This approach provides the necessary granularity to manage route advertisements effectively.
- A. Correct.
This is the correct approach. OMP requires route policies to control route advertisements, including filtering default routes. By configuring a route policy and applying it under OMP, you can ensure service-side routes are advertised while blocking default routes.
- B. Incorrect.
Disabling OMP will completely prevent the advertisement of all routes, not just default routes, which is not the desired outcome.
- C. Incorrect.
The 'advertise default' command is used to allow the advertisement of default routes, not to block them. This would achieve the opposite of the intended behavior.
- D. Incorrect.
The 'no default-route' option is not a valid configuration command in OMP. There is no such direct command to block default routes in OMP without using route policies.