This pattern scales only to local level (within a single machine or within a single LAN). Trying to scale it further can result in overloading individual nodes with messages.
For bus topology to function correctly, user is responsible for
Raw (AF_SP_RAW) BUS socket never sends the message to the peer it was received from.
Sent messages are distributed to all nodes in the topology. Incoming messages from all other nodes in the topology are fair-queued in the socket.