Now Christian often asked about when and open flow is.
Is this actually real?
Are there any implementations of software defined networking or open flow in the real world?
One of the earliest examples of an and open flow can be found at Google.
Google started deploying open flow in their networks in 2010.
Now, at the time of this recording, that is over five years ago.
So sudden and open flow have been around for quite a while.
I recommend that if you're interested in seeing examples of Zen and open flow, have a look at the Open
Networking Summit videos on YouTube.
This first example, which I've explained is open flow at Google.
And the video explains how Google had problems with the existing infrastructure and then deployed their
own switches running open flow and other protocols to scale.
In this presentation from 2012.
Google's infrastructure is explained and others in this video explains how Google have got to 100% network
utilization in their network.
He further explains why they used open flow in their core network.
One of the reasons given is that networking costs do not go down as Google scaled their network.
This is in contrast to compute and storage when running a data center at scale.
Google expects massive savings compared to a small implementation.
This was happening to compute and storage, but not to networking.
The cost of networking stayed linear or increased, which is very different to servers and storage,
where the per device cost went down as the implementation was scaled.
In networking, it was hard for Google to save money even when there were large implementations.
So by implementing open flow and sd-wan, Google were able to manage many networking devices as a single
unit rather than lots of individual networking devices.
Now they are updates to the Google presentation.
Here's one from 2015 which provides a lot more detail.
There's also presentation from 2014.
I strongly recommend that you watch this video.
The 2015 keynote presentation about Google's implementation.
It explains the reason why and the advantages of implementing open flow and steam in Google's network.
Google have also released more detailed information where they pull back the curtain on Google's network
infrastructure.
So a lot of detail is provided on how Google have implemented their network and can manage multiple
devices using open flow and MSDN.
The history is provided of different Google implementations.
As well as detailed whitepaper information explaining scaling network devices, protocols used and so
forth.
If you're interested in the details, have a look at these documents.
Otherwise, simply watch this presentation from the Open Networking Summit.