单端口环路检测技术的扩展应用  

Extended application of single-port loopback-detection technology

作　　者：郭琪[1] 

机构地区：[1]南京邮电大学自动化学院

出　　处：《电子测试》2013年第2期28-29,24,共3页Electronic Test

摘　　要：在以太网二层交换中,单端口环路检测技术尤为重要。其通过发送检测报文的形式判断在本端口上是否连接环网,但若交换机两个端口通过某种网络拓扑互联而产生回环,则无法判断。本文提出了一种扩展的端口环路检测的方法,分别在两个端口上开启扩展的端口检测功能,系统则自动发送检测报文,若在其中一个端口收到另外一个端口发送的检测报文,则说明两个端口成环,并阻塞其中一个端口。实验结果表明,扩展的端口环路检测能够有效阻止两个端口之间形成的环网,防止广播风暴的产生。On the Ethernet sending detection packets of sigle-port loopback-de Layer 2 switching, single-port loopback-detection technology is very important to deteraine whether the tection. 0pen the function sends detection massages from by system from another port, single-port loopback-detectio two ports one of the n can effe to two network ctive ports ly pr W port is loopback. This paper proposes an extended meth to the two ports respectively, then system automatical If the system receives detection massages which are se ill be block. Experimental results show that the extend event the loopback and the broadcast storm By od ly nt edsingle-port loopback-detection can effectively prevent the loopback and the broadcast storm.

关 键 词：以太网 环路检测 广播风暴 

分 类 号：TP393.11[自动化与计算机技术—计算机应用技术]