The Internet Engineering Task Force (IETF) is the leading organisation for the development of Internet standards and protocols. Three times a year, its participants gather to pursue the IETF purpose of "making the Internet work better". At this year's summer conference, IETF117 in San Francisco, a team from OST was also represented. During the conference, the OST research project "Path Tracing" by Prof. Laurent Metzger, Julian Klaiber and Severin Dellsperger was further advanced, in which important functions of the open-source library VPP were extended. VPP (Vector Packet Processing) fd.io is an open-source software platform for the Data Plane, which was developed to accelerate and optimise network functions in high-speed networks (source - fd.io/ ).