摘要
提出了一种TCAM空间划分和规则压缩相结合的方法,使得OpenFlow网络在支持实时更新的同时能采用小容量的TCAM芯片来存储网络中的规则.所提方法将TCAM芯片空间划分为实时更新区和压缩存储区,实时更新区处在TCAM芯片的前部,用于存放中央控制器发送过来的实时更新规则.后台服务器以一定的时间周期将TCAM芯片中的实时更新区的规则以及压缩存储区中的规则进行压缩,并将压缩后的规则存入TCAM的压缩区,保持实时更新区具有空间接收实时更新规则.分析了区间划分的比率问题,并利用ClassBench工具产生原始规则集进行了仿真实验,实验结果验证了本文方法的有效性.
This paper presented an approach which combines space division and rules compression in an effort to allow the real-time updates and TCAM chips storage happening at the same time. In the approach, the TCAM chip was divided into two partitions, a real-time update area and a compression storage area. The former was assigned in the front of the chip for storing real-time updating rules sent by the controller, and the latter had the function of compressing and storing rules generated by the server within certain time period. We made a comprehensive analysis of the space division ratio and conducted simulation experiments on the rules generated by the ClassBench tool. The experiment results have demonstrated the effectiveness of the approach.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第8期94-100,共7页
Journal of Hunan University:Natural Sciences
基金
国家科技支撑计划资助项目(2012BAH09B02)
长沙市重点科技计划资助项目(K1204006-11-1)
关键词
网络协议
OpenFlow
TCAM
规则压缩
实时更新
空间划分
network protocols
OpenFlow
ternary content addressable memory （TCAM）
rules com-pression
real-time update
space division
