What is the most likely cause for data traffic to be blackholed when the data policy is misconfigured, despite OMP routes being present?

• A. Missing or incorrect data policy affecting service VPN traffic
• B. CAPWAP fragmentation
• C. EtherChannel suspension
• D. STP root inconsistency

Answer: (A)

Traffic reachability shown by OMP tells the path to the destination, but it doesn’t by itself define how the actual data plane forwards that traffic. The data policy is what steers traffic across the SD-WAN overlay—deciding which service VPN to use, which tunnel, and what actions to take (allow, deny, or rewrite). If the data policy for the service VPN traffic is missing or misconfigured, there is no valid data-plane path for that traffic to follow. The result is that packets arrive with a route but have nowhere to be forwarded, so they get dropped or “blackholed” even though OMP routes exist.

CAPWAP fragmentation, EtherChannel suspension, and STP root inconsistency describe different issues (wireless encapsulation, link aggregation, and switching topology) and do not explain blackholing caused by an incorrect data policy.