双网卡冗余在嵌入式容错网络中的设计与实现

Design and Implementation of Dual NIU Redundancy in Network

为了尽量避免嵌入式网络中网络节点故障和链路故障所带来的损失,在容错网络中,需要经过良好设计的故障恢复方案,以便于在网络通信中获取较高的可靠性和易用性.提出并详细介绍了一种基于双网卡的网络冗余方法.该方法包含了故障检测和故障恢复方法.故障检测方法使用链路状态检测与Loop back检测相结合的方式;故障恢复方法在发现激活物理层故障后,将引导系统使用备用物理层.这种网络冗余方式的实现有效地提高了嵌入式网络设备的通信可靠性.又由于实现方便,造价低,可靠性高的特点,使其在现实的容错网络中获得了广泛的应用.

In order to protect against possible network node or link failure in embedded network environment, wellplaned fault recovery methods are necessary to achieve higher reliability of network communication. In this paper, we present a method based on dual NIU redundancy. The proposed method consists of the fault detection method and fault recovery method. Implementation of the proposed method can improve the reliability of communication effectively.