Summary

Recommendation ITU-T Y.3301 describes the functional requirements of software-defined networking (SDN) including the general requirements and functional requirements of the SDN application layer, SDN control layer, SDN resource layer and any multilayer management functions. This Recommendation is based on Recommendation ITU-T Y.3300 (Framework of software-defined networking), which describes the fundamentals of SDN including the definitions, objectives, high-level capabilities, requirements and  high-level architecture of SDN.