Cheapest OpenFlow switch - only $5 - use Raspberry Pi as an OpenFlow switch

This is a demo from my GNS3 SDN course:
Link: http://academy.gns3.com/courses/a-pra...

A practical, hands-on, real world approach to learning and implementing SDN and OpenFlow.

See SDN and OpenFlow in action. Learn SDN and OpenFlow practically. You can set up everything shown here on your laptop using free or demo software.

Learn all tiers of the SDN Architecture:

Applications - Wireshark, Bash scripts, FlowMaker, HP Network Protector, HP Network Visualizer

Controllers - Learn OpenDaylight (ODL), ONOS, RYU and the HP VAN SDN Controllers.

OpenFlow Infrastructure - Mininet switches (Open vSwitch)

Wireshark:
Capture OpenFlow messages using both Linux and Windows based Wireshark.

Technical content:
No sales hype, no fluff. Just technical content.

OVAs:

As part of the course, I have made OVAs available of ODL, RYU and the HP VAN SDN Controller. I have also provided links to download OVAs directly for ONOS and Mininet.

Real world SDN examples:

The NSA

Google

Microsoft Azure

Facebook

Microsoft Linux

Update 10 November 2015:

Based on feedback, additional videos discussing the installation of apps on the HP controller have been added:

Install HP Controller

Troubleshoot browser issues

Install FlowMaker on HP Controller

Troubleshoot app install issues

Update 25 October 2015:

Additional videos added to the course discussing:

Do you need to replace switches to use SDN?

Do you need to run OpenFlow everywhere in your network?

How does OpenFlow and Spanning Tree interact?

Does a single controller manage the entire network?