Curious about software-defined networking (SDN) but not quite sure what it is? Eli "The Computer Guy" Etherton answers every introductory question you may have in this 25-minute video presentation.
Etherton explains how SDN stands to revolutionize networking in the same way that the cloud revolutionized storage and hosting, and that virtualization revolutionized computing.
After a brief overview of the last few decades of computing and how SDN fits into the big picture, Etherton hits the following points:
- SDN pulls intelligence away from the hardware itself.
- SDN is to networking as storage area networks (SANs) were to data storage, and virtualization is to computers.
- SDN separates networking into four planes: the control plane, the data plane, the services plane, and the management plane.
- The data plane forwards the data packets and includes the standard networking equipment.
- The services plane deals with services like the firewall by taking them off of the standard networking equipment and handling them on servers.
- The control plane controls all of the networking devices on the data plane and manages services on the service plane.
- The management pane manages all of the other panes.
- Control protocols are used to communicate between the control pane and the data plane. OpenFlow is an example of a popular open source control protocol.
- SDN allows for easy network traffic shaping based on need.