Huawei Huawei Huawei China Mobile SK Telecom In-situ Flow Information Telemetry (iFIT) is a framework for applying data plane telemetry techniques such as In-situ OAM (iOAM) and Postcard-Based Telemetry (PBT). It enumerates several key components and describes how these components are assembled to achieve a complete working solution for user traffic telemetry in carrier networks.