BGP peering and route update messaging is explored in detail in this flow.
This message flow shows how two BGP routers:
- Peer by establishing a TCP connection and exchanging BGP OPEN messages.
- Exchange Keep Alive messages to ensure that the routers are reachable.
- Exchange routes using BGP UPDATE messages.
- Release the BGP connection on operator command.
All messages in this sequence diagram may be clicked to see complete field level details of every BGP message.