The Theory of Docker Overlay Networking
Understand the theory behind Docker overlay networking by learning how VXLAN tunnels create virtual layer 2 networks on top of existing layer 3 infrastructures. This lesson explains key concepts like underlay networks and VXLAN tunnel endpoints to help you grasp how Docker manages container communication transparently across complex network topologies.
We'll cover the following...
We'll cover the following...
First and foremost, Docker uses VXLAN tunnels to create virtual layer 2 overlay networks. So, let’s do a quick VXLAN primer.
VXLAN primer
At the highest level, Docker uses VXLANs to create layer 2 networks on top of existing layer 3 infrastructure. That’s a lot of jargon. That means you can create simple networks on top of complex networks. The ...