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DP83822HF: DP83822HF光纤不通,网卡没有link状态

Part Number: DP83822HF

我使用DP83822HF接入光纤时,光纤信号已经能够检测到了,但是无法ping通,通过ifconfig eth0命令查看网卡信息,发现没有running字段,请问是什么原因呢?