Part V: Network Automation
Chapter 16: Introduction to Controller-Based Networking
Chapter 17: Cisco Software-Defined Access (SDA)
Chapter 18: Understanding REST and JSON
Chapter 19: Understanding Ansible, Puppet, and Chef
Part V of this book includes most of the network automation topics from the CCNA blueprint; however, the part includes as much discussion of how Cisco and others have changed the way networks work to enable better automation as it discusses tools and processes to automate networks.
Chapters 16 and 17 examine a wide range of products and architectures that also enable better operations and automation. Chapter 16 discusses how controllers can separate out part of the work formerly done by networking devices. The chapter shows the advantages of these new controller-based models and details a few examples. Chapter 17 then goes on to give more detail about Cisco Software-Defined Access (SDA), a controller-based networking approach to building enterprise campus networks.
Chapters 18 and 19 discuss a few more specific details about network automation. Controllers typically include REST APIs and often return data to automation programs in the form of formatted data like JSON. Chapter 18 introduces these concepts. Chapter 19 then moves on to discuss IT automation tools, specifically Ansible, Puppet, and Chef, with focus on how to use these tools for network automation.