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[宽带症候群] 诡异的上海电信光猫协商速率问题

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签约的 1000M/100M 宽带，光猫改桥接，20 年的光猫。今天突然出现光纤指示灯闪烁，无法 PPPOE 拨号，重启后可以正常拨号，但协商速率居然变成 10Mbps ，不论更换网线还是更换测试终端，拨号设备链接光猫均协商速率固定在 10Mbps 。

已经打电话保障，师傅说上门看一下，考虑可能是光猫老化。

V 友有遇到类似的情况吗？

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