摘要： 针对高可靠性网络通信中网卡的双冗余备份技术存在网络切换延时问题，提出一种在网络控制芯片内完成网络切换的方法。通过在网络链路层对接收的数据进行协议解析，判断网络通道和接收数据的正确性进行网络切换。实现在网络通道出现故障或接收数据出错时实时切换到正常网络通道的功能。

关键词: 实时切换, 数据缓存区, 状态机

Abstract: The paper presents the method to complete network switch in chip of network controller in allusion to network switch delay in the redundancy backup technology of the network cards in the network communications. The network channels is switched according to the state of network channels working and data receiving circuit when datum received are decoded in network link layer. This implements the function of real-time switch when network equipment is trouble in physics layer or datum received is wrong.

Key words: real-time switch, data buffer, state machine

中图分类号: 

• TP393