I recently gave an internal Red Hat talk entitled: Introduction to Neutron. It is a high-level, concepts oriented talk.

In it I talk about:

• Why Neutron?
• An example of network virtualization
• Ports, networks and subnets
• External, provider and tenant networks
• L3 model – Internal and external subnets, routers, NAT and floating IPs
• An overview of the different Neutron components
• Nova <–> Neutron interaction when creating a VM
• Explanation of the core plugin concept
• Brief rundown of the service plugins (VPN, Load balancing and Firewalls)

Here’s the PDF.

And the video: