如果兩兩個單元中的一-個已經(jīng)是激活狀態(tài)并在使用這個冗余的IP地址，它會繼續(xù)使用這個地址，那個備用的單元不能激活這個冗余IP地址。以太網(wǎng)介面監(jiān)視CPU的狀態(tài)。如果以太網(wǎng)介面確認它不能和其它CPU進行通訊了，它會使這個冗余IP地址失效。以太網(wǎng)介面在被通知本CPU不再是激活的CPU的時候也會使這個IP地址失效。如果以太網(wǎng)介面放棄使用冗余IP地址，

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