本文首先分析了骨干路由器的高可用性要求，设计并实现了一种基于消息传递机制的面向协议软件的高可用性系统。
We analysis the requirements of high availability of core router firstly, design and implement a protocols oriented high availability system based on message passing.
对软件中最为关键的操作系统、路由软件和驱动程序作了详细的分析。
It analyzed the operating system, routing software and driver in detail, which ware the most important in software.
在实现部分，结合目前教研室已开发了的路由器软件，分析了其体系结构。
In the implementing chapters, I analyses the structure of the router's software which was developed by our lab team.
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