高速交换网络的建模与仿真

高速交换网络是高速路由器／交换机的核心部件，负责查表后的“信元”的转发，它是限制路由器／交换机交换容量的一个重要因素。本文主要对高速交换网络进行了建模和仿真研究，首先给出了一般意义上的交换网络模型，并分析了各个组成部分；然后着重讨论了输入排队的crossbar交换网络，从吞吐量、时延两个主要指标衡量了高速交换网络的性能。仿真结果表明输入排队的crossbar交换网络适用于高速、大容量的路由器／交换机中。

Modeling and Simulation for High-Speed Switching Fabrics

High-speed switching fabric is the core for high-speed router/switch, which is responsible for forwarding cells after table lookup. Switching fabric is one of the important factors to limit router/switchs capacity. In this paper, we try to model and simulate switching fabrics. Firstly, we propose a general switching fabric model, and describe its components. Then, we stress to discuss one kind of switching fabrics ---- input-queued crossbar, and evaluate its performance measured by throughput and time delay. In a result, input-queued crossbars are suitable for building high-speed, large capacity routers/switches.