According this [1] blog post, networking is pluggable, and the current "overlay driver" uses an overlay network via VXLAN tunneling. The driver sets up the tunn

According this [1] blog post, networking is pluggable, and the current "overlay driver" uses an overlay network via VXLAN tunneling. The driver sets up the tunnels automatically for you. [1] https://blog.docker.com/2015/06/networking-receives-an-upgrade/ https://blog.docker.com/2015/06/networking-receives-an-upgra...