以太网介面在被通知本CPU不再是激活的CPU的时候也会使这个IP地址失效。如果以太网介面放弃使用冗余IP地址，它会切换到备用状态。备用状态中，以太网介面不再使用那个冗余IP地址，而将其它地方传过来的于冗余IP地址有关的信息传递给激活单元中的以太网介面。如果备份单元继续接收预定的冗余IP地址的数据包，

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