350-501 Question #497: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. Routers R1 and R2 are part of a large enterprise network. The two devices are running BGP to advertise routes between them. The R1 Gi0/1 interface, which is connected to R2. is configured with the next hop for all advertised prefixes' IP addresses. A network engineer noticed that R2 is not receiving certain routes from R1, which is causing connectivity issues. The engineer confirmed that the R2 IP address is reachable, and R2 is not filtering routes. Which action must the engineer take on R1 to resolve the issue?

Options

• AAdd set metric 100 to the DENY_ROUTES route map.
• BApply route-map DENY_ROUTES under the BGP configuration.
• CRemove sequence 10 from the BLOCKED_ROUTES prefix list.
• DChange the sequence 10 action in the DENY_ROUTES route map to block.

Explanation

The route-map DENY_ROUTES and prefix-list BLOCKED_ROUTES are correctly configured to filter specific routes (e.g., 10.3.3.0/24). However, the route map has not been applied under the BGP configuration on R1. This means the filtering logic is not in effect, allowing all routes to be To resolve the issue, the engineer must apply the route-map DENY_ROUTES under the BGP configuration on R1 using the command neighbor <R2 IP> route-map DENY_ROUTES out This ensures that the route-map is applied to outgoing BGP updates, filtering the specified routes as intended. Other actions (e.g., modifying sequence 10 or adding metrics) do not address the lack of route-map application.

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