ATM局域网性能测试与分析

异步传输模式（ＡＴＭ）常被认为是一种解决网络带宽瓶颈的技术，但是应用程序从ＡＴＭ网络获得的带宽受到许多因素的限制。本文通过在ＣＥＲＮＥＴ的ＡＴＭ测试床上的实验，对基于ＡＴＭＡＰＩ的数据交换和基于ＴＣＰ／ＩＰ／ＡＴＭ的数据交换进行了对比。结果表明，原始的ＡＴＭ信元交换其效率是非常好的，但在不同协议栈上的应用所能获得的带宽受系统软件、传统的网络协议和端系统等诸多方面的限制。通过调整这些因素，可以提高应用程序可获得的带宽。

Performance Testing and Analysis of ATM LAN

Asynchronous Transfer Mode(ATM)is often seen as a solution to networks with bandwidth limitation by users today,but the available communication bandwidth to applications is limited by many factors In order to compare the data exchange performance on native ATM API and TCP/IP/ATM socket,we carried out some experiments on CERNET's ATM Testbed The result shows that,raw ATM cell switching is extremely efficient,however the bandwidth offered to applications of different protocol stacks still varies with current internetworking mechanisms,system software,legacy protocols and end system's configuration Varying these parameters can improve the performance of applications over ATM LAN