FOP4: Function Offloading Prototyping in Heterogeneous and Programmable Network Scenarios

Offloading packet processing tasks to programmable switches and/or to programmable network interfaces, so called 'SmartNICs', is one of the key concepts to prepare softwarized networks for the high traffic demands of the future. However, implementing network functions that make use of those offloading technologies is still challenging and usually requires the availability of specialized hardware. It becomes even harder if heterogeneous services, making use of different offloading and network virtualization technologies, should be developed. In this paper, we introduce FOP4 (Function Offloading Prototyping with P4), a novel prototyping platform that allows to prototype heterogeneous software network scenarios, including container-based, P4-switch-based, and SmartNIC-based network functions. The presented work substantially extends our existing Containernet platform with the means to prototype offloading scenarios. Besides presenting the platform's system design, we evaluate its scalability and show that it can run scenarios with more than 64 P4 switch or SmartNIC nodes on a single laptop. Finally, we presented a case study in which we use the presented platform to prototype an extended in-band network telemetry use case.