Refer to the exhibit. A network technician is verifying the BGP configuration and peer relationship by using the show bgp ipv4 unicast summary command on router R1. Which conclusion can be drawn from the output?

Question:

Refer to the exhibit. A network technician is verifying the BGP configuration and peer relationship by using the show bgp ipv4 unicast summary command on router R1. Which conclusion can be drawn from the output?

• The neighbor relationship is established but no packet has been exchanged.
• An IBGP connection is being configured between the two routers.
• The AS number used in the neighbor configuration is wrong.
• The local router has no Layer 3 connectivity with the neighbor router.

Explanation: Two BGP routers do not have to be directly connected or in the same subnet to form a BGP neighbor relationship; however, Layer 3 connectivity is required. For a router to have Layer 3 connectivity to another, it needs to have a route in the routing table that points to the neighbor router. If no route to the neighbor exists, a neighbor relationship cannot form. When the show bgp ipv4 unicast summary command to review/verify BGP states is being used, the Idle state under the State/PfxRcd field indicates that the local router is not able to make a TCP connection with the neighbor.

Exam with this question: CCNP Enterprise: Advanced Routing (Version 8.0) – BGP Exam