Some issues of the SDN concept practical implementation

The software-defined networking (SDN) concept, widely discussed lately, is subject to versatile consideration. Regarding the SDN, both unobviousness of several prevalent judgments and conventionality of many widely advertised advantages (e. g., deployment speed-up, operating costs reduction, and control quality improvement) are exposed. The analysis reveals such peculiarities of the SDN approach as inclination to spatial limitation, burdens of individual applied programming, desirability of introducing special trusted control channels, slowed down communication between the control and data planes, problems with ensuring reliability and availability, and objective complexities of connection with existing traditional networks. An attempt is made to explain the recent SDN concept popularity motives with commercial interests of some heavyweights on the microelectronics and networking software markets. Perspectives and conditions of the SDN concept practical implementation in the future are shown.