Abstract: High performance routers presently take the measure of hardware methods based on TCAM to realize high speed routing lookups. But the longest prefix matching complicates the updates of TCAM. This paper proposes a two stage forwarding tables managing method, to improve the poor performance of present method when updates come burstily, and researches the performance of the method through simulation. Simulation results prove that the method keep the forwarding system stable in burstiness.

Key words: TCAM, two stage forwarding tables, simulation of discrete event system

摘要： 目前高性能路由器的查找方案采用基于三重内容可寻址存储器(TCAM)的硬件查找。路由查找的最长前缀匹配要求使得TCAM的表项更新复杂。该文针对当前转发表管理方案在带突发情况下的不足，提出一种基于TCAM二级转发表管理方案，并对该方案进行了计算机仿真研究，仿真结果表明该方案在突发的情况下仍能保证转发系统稳定工作。

关键词: 三重内容可寻址存储器, 二级转发表, 离散事件系统仿真

CLC Number: 

• TP393