Networking on a Docker Engine is provided by a bridge network, the docker0 bridge. The docker0 bridge is local in scope to a Docker host and is installed by default when Docker is installed. All Docker containers run on a Docker host and are connected to the docker0 bridge network. They communicate with each other over the network.
The Problem
The default docker0 bridge network has the following limitations:
The bridge network is limited in scope to the local Docker host to provide container-to-container networking and not for multi-host networking.
The bridge network ...
