300-415 Question 17
Select 3A company is deploying a Cisco SD-WAN solution and notices that OMP (Overlay Management Protocol) is not establishing a peering relationship between vSmart controllers and vEdge routers. Which of the following could be the cause of this issue?
- A
Mismatch in the system IP addresses between vSmart and vEdge devices.
- B
OMP is not enabled on the WAN interface of the vEdge router.
- C
vSmart controllers are not configured with valid certificates.
- D
The vEdge router is unable to reach the vManage controller.
- E
The time synchronization between vSmart and vEdge devices is not aligned.
Show answer and explanation
Correct answers: A, C, E
Explanation
OMP peering between vSmart controllers and vEdge routers depends on several factors, including accurate system IP configuration, valid certificates for secure communication, and proper time synchronization. Any misconfiguration or issue in these areas can prevent the establishment of the OMP peering relationship, which is essential for the control plane in Cisco SD-WAN solutions.
- A. Correct.
A mismatch in system IP addresses can prevent the OMP peering relationship from being established because system IP addresses are used to identify and establish communication between devices in the SD-WAN overlay.
- B. Incorrect.
OMP does not need to be explicitly enabled on the WAN interface; it runs automatically on devices that are part of the SD-WAN fabric.
- C. Correct.
vSmart controllers require valid certificates for secure communication. If the certificates are invalid or missing, OMP peering relationships will fail.
- D. Incorrect.
While connectivity to the vManage controller is important for the initial configuration, it is not directly involved in the OMP peering process between vSmart and vEdge devices.
- E. Correct.
Time synchronization is critical in SD-WAN environments to ensure proper operation of control plane protocols. A significant time drift can prevent OMP peering relationships from forming.