The sequel to the first module which provides an introduction to Network Function Virtualization (NFV), this IEEE Software Defined Networks' eLearning module offers an overview of the Open Baton Open Source Framework. The module is structured into two major parts. First, it presents the NFV ecosystem as it is today. This part will also cover all the available open source technologies and their architectures which are compliant and relevant in the NFV ecosystem. Second, the module focuses on the Open Baton project: its architecture, functionalities and roadmap are extensively discussed.