300-415 Question 150
Select 2You are configuring OSPF in a Cisco SD-WAN environment to ensure connectivity between multiple branch sites. During the configuration, you notice that the OSPF routes are not being advertised into the SD-WAN overlay. What could be the possible cause of this issue?
- A
The OSPF routes are not redistributed into OMP on the edge router.
- B
The OSPF interface is not set to the correct area ID.
- C
The OSPF adjacency has not been established between the edge routers.
- D
The edge router is not configured with a valid system IP.
Show answer and explanation
Correct answers: A, C
Explanation
In a Cisco SD-WAN environment, for OSPF routes to be advertised into the SD-WAN overlay, they must first be redistributed into OMP on the edge router. Additionally, OSPF adjacency between routers is crucial for OSPF routes to be learned and advertised. Other factors, such as OSPF area configuration or system IP, do not directly affect the propagation of OSPF routes into the overlay.
- A. Correct.
OSPF routes must be redistributed into OMP for them to be advertised into the SD-WAN overlay. Without redistribution, the OSPF routes will not propagate through the overlay network.
- B. Incorrect.
While an incorrect OSPF area ID can cause OSPF issues, it does not directly prevent OSPF routes from being advertised into the SD-WAN overlay.
- C. Correct.
If OSPF adjacency is not established between the edge routers, OSPF routes will not be learned or advertised. This is a critical step to ensure OSPF connectivity.
- D. Incorrect.
The system IP is part of the SD-WAN fabric configuration and does not directly impact OSPF route advertisement into the SD-WAN overlay.