The aim of my thesis is to produce an affordable and powerful enough system of testing connectivity, according to the Point-to-Point Protocol over Ethernet (PPPoE) connection. PPPoE is a network protocol for encapsulating Point-to-Point frames (Point-to-Point Protocol - PPP). There are other test apparatus, which make this possible, but at higher prices than my apparatus. The product of this thesis is a reliable system that allows for testing of PPPoE sessions. I was given the task of developing this during practical training at the Slovenian company Siol, where I successfully did so. The system is built on a Raspberry Pi miniature computer. On it, I have installed the script, with the appropriate software code, that I wrote for testing PPPoE sessions. I then added a results and graphs display, which gives insight into measurements results and graphs.