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.
Related exam: CCNP ENARSI 8 Modules 11 - 14 Checkpoint Exam: BGP Exam
