【摘要】 通过对西气东输一线站场监控和数据采集(SCADA)系统的局域网结构和冗余性特点进行分析,找出了系统网络环路形成的原因和解决方法。在局域网Cisco交换机上,应用生成树实例对交换机配置进行修改,在不改变网络结构和冗余性的同时,使交换机能够对网络环路进行自动阻塞。结果表明,应用生成树实例后,网络环路问题得到有效解决,设备间通信质量和设备工作性能得到提升,SCADA系统局域网的稳定性和可靠性也相应提高。更多还原

【Abstract】 Through analyzing the structure and redundancy features of LAN of the SCADA in the station site of West-East Natural Gas Line I,the forming reasons of the system network loop and solutions are found.On the Cisco switches in LAN,by adopting the spanning-tree instance,the configuration of switches is modified;thus the switches can block the network loop automatically while the structure and redundancy of the network are unchanged.The result indicates that after applying the spanning-tree instance,the problem of network loop is solved effectively,the communication quality and performance of devices are enhanced,and the stability and reliability of LAN of the SCADA are improved.更多还原