Which Junos OS operational mode command provides a high-level view of all configured BGP peers?

A.
show bgp group

B.
show bgp neighbor

C.
show bgp summary

D.
show bgp adjacency

Explanation:
To check that all IBGP and EBGP sessions are properly established, enter the following JUNOS CLI operational mode command:

Sample Output

user@host> show bgp summary
Groups: 1 Peers: 3 Down peers: 0
Table Tot Paths Act Paths Suppressed History Damp State Pending
inet.0 6 4 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Damped…
10.0.0.2 65002 88675 88652 0 2 42:38 2/4/0 0/0/0
10.0.0.3 65002 54528 54532 0 1 2w4d22h 0/0/0 0/0/0
10.0.0.4 65002 51597 51584 0 0 2w3d22h 2/2/0 0/0/0

Meaning

The output shows a summary of BGP session information. Verify the following information:

* For Groups, the total number of configured groups is shown.
* For Peers, the total number of BGP peers is shown.
* For Down Peers, the total number of unestablished peers is 0. If this value is not zero, one or more peering sessions are not yet established.
* Under Peer, the IP address for each configured peer is shown.
* Under AS, the peer AS for each configured peer is correct.
* Under Up/Dwn State, the BGP state reflects the number of paths received from the neighbor, the number of these paths that have been accepted, and the number of routes being damped (such as 0/0/0). If the field is Active, it indicates a problem in the establishment of the BGP session.