JN0-360 Exam: Identifying the Source of a Missing BGP Route

Identifying the Source of the Problem

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Question

You notice that a route from internal BGP peer 192.168.1.1 is missing from the local route table. Which two commands would be used to help identify the source of the problem? (Choose two.)

Answers

Explanations

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A. B. C. D.

BC

The scenario describes a missing route from an internal BGP peer. In this case, we can use the following two commands to help identify the source of the problem:

A. show route bgp: This command will display the BGP routing table, which contains all the routes learned from BGP peers. By analyzing the output, we can check if the missing route is present in the BGP table or not. If the route is present in the BGP table, it means that BGP is advertising the route, and the problem could be with the local routing table or the forwarding table. If the route is not present in the BGP table, it means that the BGP peer is not advertising the route, and we need to investigate the BGP session and the BGP configuration.

C. show route receive-protocol bgp 192.168.1.1: This command will display the routes received from the specified BGP peer. By analyzing the output, we can check if the missing route is being received from the BGP peer or not. If the route is not being received, it means that the BGP peer is not advertising the route, and we need to investigate the BGP session and the BGP configuration. If the route is being received, it means that the problem could be with the local routing table or the forwarding table.

B. show route protocol bgp hidden and D. show route advertising-protocol bgp 192.168.1.1 are not directly relevant to the problem described in the scenario. The "hidden" keyword in the first command displays hidden BGP routes, which are routes that are not active in the routing table. The second command displays routes that are being advertised to a specific BGP peer, which is not relevant to the missing route problem.

Therefore, the two relevant commands to identify the source of the problem are A. show route bgp and C. show route receive-protocol bgp 192.168.1.1.