如何启用以太网 1 千兆位广告或排除故障?

如何启用以太网 1 千兆位广告或排除故障?

在 Debian Stretch 盒上,我有一个千兆以太网网络适配器,但此模式未激活(但显示为支持)。

这是否取决于外围设备状况(例如,电缆不够好,另一个盒子有一个较旧的,即只有 100 Mbit 的网络控制器 - 或者我可以以某种方式激活此模式吗?

输出ethtool eth0

Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
        Link partner advertised pause frame use: Symmetric
        Link partner advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000033 (51)
                               drv probe ifdown ifup
        Link detected: yes

答案1

关键内容如下:

    Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                         100baseT/Half 100baseT/Full

这可能意味着另一台设备(很可能是交换机)没有宣传 1Gbps,或者有问题的电缆无法支持 1Gbps。检查两者,并验证电缆是否已连接所有八个引脚 - 如果有疑问,请更换电缆。

您还可以使用mii-tool -v来验证来自的信息ethtool

或者,您可以使用ethtool强制 NIC 达到 1Gbps,但请注意,您可能会失去网络连接:

ethtool -S eth0 speed 1000 duplex full autoneg on

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