300-415 Question 132
Single answerAn enterprise has deployed a Cisco SD-WAN solution and needs to configure OMP to facilitate route exchange between vEdge devices and the vSmart controller. The network engineer wants to ensure that only specific prefixes from a branch site are advertised to other sites via OMP. What is the correct way to achieve this?
- A
Configure a centralized control policy on the vSmart controller to filter prefixes and apply it to OMP.
- B
Enable OMP graceful restart on all vEdge devices to restrict prefix advertisement.
- C
Modify the OMP configuration on the vSmart controller to deny unwanted prefixes.
- D
Use a localized data policy on the vEdge devices to filter prefixes before they are advertised.
Show answer and explanation
Correct answer: A
Explanation
Centralized control policies on the vSmart controller are the appropriate method for controlling the advertisement of specific prefixes in an SD-WAN environment. These policies allow administrators to define rules for route filtering, aggregation, and manipulation, ensuring that unwanted prefixes are not advertised to other sites via OMP. The other options either involve functionalities unrelated to prefix filtering or are not designed for centralized OMP route control.
- A. Correct.
This is the correct option. Centralized control policies on the vSmart controller are used to filter or manipulate route advertisements through OMP for the entire SD-WAN fabric. These policies can be applied to restrict specific prefixes from being advertised.
- B. Incorrect.
OMP graceful restart is used to maintain routing information during a control-plane failure, but it does not provide any mechanism for restricting prefix advertisement.
- C. Incorrect.
While OMP configuration on the vSmart controller allows for general OMP settings, filtering specific prefixes requires the use of policies, not direct OMP configuration changes.
- D. Incorrect.
Localized data policies on vEdge devices can control traffic forwarding but are not used for OMP route advertisement filtering. Prefix filtering must be performed using centralized control policies.