BGP Peering Sessions

BC

The output of the "show bgp summary" command displays the BGP peering sessions that the local router has established with its neighbors. The output shows the following information for each neighbor: IP address, autonomous system (AS) number, the number of incoming and outgoing packets, the number of output messages queued, the number of times the session has flapped, the date and time of the last session's up and down status, and the current state of the session.

According to the exhibit, there are three BGP peering sessions shown, and the following can be concluded:

• The peering session with the 5.1.1.1 neighbor is fully operational: The State column for the 5.1.1.1 neighbor shows "Established," indicating that the BGP peering session with this neighbor is up and running, and the router is able to exchange BGP updates with this neighbor. Therefore, option B is correct.

• The peering session with the 10.1.1.1 neighbor is not operational: The State column for the 10.1.1.1 neighbor shows "Active," indicating that the local router is trying to establish a TCP connection with this neighbor but has not yet succeeded. This could be due to a network connectivity issue, a misconfiguration of the BGP session, or a problem with the neighbor router. Therefore, option A is incorrect.

• The local router peering with the 20.1.1.1 neighbor is not operational: The State column for the 20.1.1.1 neighbor shows "Idle," indicating that the local router is not attempting to establish a TCP connection with this neighbor. The router is waiting for an event, such as a configured policy match, to start the BGP peering session. Therefore, option C is correct.

• There is no information in the output to support the claim that the local router peering with the 20.1.1.1 neighbor is waiting for a BGP refresh message. Therefore, option D is incorrect.

In summary, options B and C are the correct statements based on the output of the "show bgp summary" command shown in the exhibit.