scope:

This Recommendation describes the functional requirements of software-defined networking (SDN), which are defined in [ITU-T Y.3300], by providing:

- general requirements,

- functional requirements of the SDN application layer,

- functional requirements of the SDN control layer,

- functional requirements of the SDN resource layer, and

- functional requirements of the multilayer management functions.

NOTE - In [ITU-T Y.3300] the term "application layer" refers to "SDN application layer" and "resource layer" refers to "SDN resource layer".. As the names "application layer" and "resource layer" are too general this Recommendation uses more specific names of layers such as "SDN application layer" and "SDN resource layer".