| ACTIVE | Neighbor is down, and the local system is awaiting a connection from the remote peer. |
| CONNECT | Neighbor is down, and the session is waiting for the underlying transport session to be established. |
| ESTABLISHED | Neighbor is up - the BGP session with the peer is established. |
| IDLE | Neighbor is down, and in the Idle state of the FSM. |
| OPENCONFIRM | Neighbor is in the process of being established. The local system is awaiting a NOTIFICATION or KEEPALIVE message. |
| OPENSENT | Neighbor is in the process of being established. The local system has sent an OPEN message. |