BGP Neighbor states

  • idle:
    • BGP is down or waiting next retry
  • Connect:
    • The BGP is waiting for the TCP connection to be completed
  • Active:
    • The TCP Connection failed, Connect-retry timer running, listening for incoming TCP Connections
  • Opensent:
    • The TCP connection exists and a BGP Open Message as been send.
    • The matching Open Message has not yet been received
  • Openconfirm:
    • Open Message has been send and received
  • Established:
    • All neighbor parameters match
    • Relationship works
    • Peers can exchange update messages

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