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So what I'm going to try and do here is try and remove some of the hype and turns causing confusion

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and kind of group visions of software defined networking into different compartments.

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So the first vision and the original vision will define as open SDM.

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This is based on the original work at Stanford and uses the open flow protocol.

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The organization that's driving this today is the open networking Foundation.

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It defines software defined networking as the separation of the control plane and data plane and later

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in this presentation I'll explain what that actually means implementations of software defined networking

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controllers include open daylight or audio on us NOx pox floodlight and others including commercial

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controllers from the likes of HP and others.

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I'm creating multiple courses to explain each of these visions or examples of software defined networking.

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So have a look on the genius 3 Web site for more courses where I do deep dives into the details and

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nitty gritty of each of these visions of SD in the next vision is software defined networking via overlays.

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And the most famous example of this is probably NSX from VM way.

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As you can see in this video Martin Casado works at VM way his company knows Sera was purchased by VM

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way a few years ago for over a billion dollars and VM we're now advocates a virtual network overlaid

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a cross a physical network.

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We have the concept of a underlay network which are the physical network devices and we have a virtual

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network that can automatically be deployed across the physical network.

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This uses protocols like V X LAN and envy jury.

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Another example of this is New Age networks which have a product for very high scale multi datacenter

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multi hypervisor Virtual Networks a third vision or definition of software defined networking is what's

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called Bright boxes or white boxes.

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So white box SDM examples of companies that are involved here include picker 8 and Cumulus networks.

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Why run proprietary operating systems tied to proprietary hardware.

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Why not run an operating system that can be installed on multiple vendor devices.

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So in this example you could have a physical switch and today as an example you may want to run one

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operating system but next week you may want to replace it with a different operating system.

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And that's what these vendors allow you to do.

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Don't buy proprietary hardware proprietary operating systems and proprietary features rather by switches

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that are not tied to a specific vendor.

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Another example that kind of fits in this is the facebook open compute switches such as Six Pack and

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wedge.