基于传统交换机实现OpenFlow功能

Implementing OpenFlow-hybrid Function Based on Traditional Switch

随着OpenFlow技术的发展,各大网络厂商相继研发OpenFlow交换机.由于OpenFlow协议版本快速更新,网络厂商不敢盲目定制硬件.立足现有商业交换机的硬件平台,不改变交换机硬件,采用软件方式统一有效的管理交换机现有的硬件存储表,实现OpenFlow超长的流表项匹配和复杂的行为,研发出一款支持多流表查找的交换机,并完成了多流表交换机模型建模,完成数据包多流表查找的时间延迟分析,得到多流表查找的延迟函数,并测量了多流表处理的性能,为后续OpenFlow多流表实现具有一定的指导意义.

With the commercial development of OpenFlow technology, each big manufacturers launched OpenFlow switch network, because the OpenFlow protocol version update quickly, hardware manufacturers can＇t blindly customized hardware. This paper based on existing business switch hardware platform, does not need to change the switches low-level hardware, via the software coding way, through a unified and effective management switch existing hardware store table, realizes OpenFlow long flow table matching fields and complex instructions, exploits a support multiple flow table lookup switches. This paper also completes multiple flow table switch model, analyzes the time delay of packet multiple flow table lookup, gets more flow table lookup delay function. At last the paper analyzes the performance of flow table processing, completes the performance evaluation, which has certain guiding significance for implementation of OpenFlow multiple flow table switch.