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现有网络日趋庞大,协议体系繁杂,网络架构复杂,数据流量巨大导致目前网络通信管理的高度复杂化,网络性能无法保证,出现网络新能瓶颈。SDN网络架构实现了软硬件分离,管理和执行分离,使得网络设备软件可编程。文中介绍了SDN技术特点,体系优势,分析了基于OpenFlow的SDN体系结构的关键技术,并探究了SDN技术作为下一代网络技术发展的主要趋势。
The existing networks are increasingly large, the system of protocols is complicated, the network architecture is complicated, and the huge data traffic leads to the high complexity of the current network communication management, the network performance can not be guaranteed, and new bottlenecks in the network appear. SDN network architecture to achieve the separation of hardware and software, management and implementation of separation, making network equipment software programmable. This paper introduces the features and advantages of SDN technology, analyzes the key technologies of SDN architecture based on OpenFlow, and explores the main trend of SDN technology as the next generation network technology development.