FELIX – Commissioning the new detector interface for ATLAS trigger and readout

During the current major LHC shutdown (2019-2021), the ATLAS experiment at CERN is moving to the Front-End Link eXchange (FELIX) system as the interface between the data acquisition system and the trigger and detector front-end electronics. FELIX functions as a router between custom serial links and a commodity switch network, which uses industry-standard technologies to communicate with data collection and processing components. This presentation will describe the FELIX system design as well as report on the installation and commissioning of the full system in summer 2019.