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OpenFlow currently is the only one protocol that can implement ideas of the Software Defined Networking pioneers. The Protocol is unique because of ability to separate any network device control and data planes. All network intelligence is (logically) centralized in dedicated controllers. Objective of this article to propose a new method that enhances QoS in data networks by using OpenFlow protocol. [ABSTRACT FROM AUTHOR]

Feasibility study of 8-bit microcontroller applications for Ethernet is presented. Designed device is based on ATmega32 microcontroller and 10 Mbps Ethernet controller ENC28J60. Device is simulated as mass queuing theoretical model with ticket booking counter. Practical explorations are accomplished and characteristics are determined. Practical results are compared to theoretical ones. Program code and device packet processing speed optimization are discussed. Microcontroller packet processing speed and packet latency depend on packet size. For ICMP protocol packet processing speed varies 1.4-2.1 Mbps, latency - 0.8-8.4 ms. UDP protocol packet processing speed varies 1.3-1.8 Mbps, latency- 1.1-9.6ms. Packet processing speed depends on compilation settings and program code compression level. Best results are reached on optimization level-03, then speed increased ~3% but program code size increased 68% comparing to -Os optimization level. [ABSTRACT FROM AUTHOR]