VxWorks环境下网卡驱动与双网卡冗余设计

Analysis of NIC Driver and Design for Dual-Redundance NIC in VxWorks

分析了VxWorks环境下网卡驱动特点与加载过程,指出了MUX与网卡句柄在网络通信中的重要作用,详细设计了双网卡冗余备份方案。该方案在网络通信过程中,放弃MUX层传递的网卡句柄,自动指定网卡进行通讯,并根据网卡故障情况、连接状态以及网络通信稳定性进行冗余之间的切换。测试结果分析表明,该冗余设计方案稳定可靠,其切换时间可至毫秒级。

The characters of NIC Driver and loading process are analyzed,the important role of MUX and NIC handle in communication is pointed out,and also a method of dual-redundance NIC is designed.In the method,the NIC handle from MUX is discarded and the communicating NIC is auto-appointed,and also the communicating NIC can be auto shifted according to the Link state,fault condition of NIC and communication stability of network.The testing result shows that the method is reliable and the shift time is shortened to millisecond grade.