Debian12 设置网卡优先级

  1. 编辑 /etc/network/interfaces

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    vim /etc/network/interfaces

  2. 调整 metric 优先级， 数值越小优先级越高

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    # This file describes the network interfaces available on your system
    # and how to activate them. For more information, see interfaces(5).

    source /etc/network/interfaces.d/*

    # The loopback network interface
    auto lo
    iface lo inet loopback

    # The primary network interface
    allow-hotplug ens18
    iface ens18 inet dhcp
    metric 10

    allow-hotplug ens19
    iface ens19 inet dhcp
    metric 100

  3. 重启网络服务

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    systemctl restart systemd-networkd
    # 或者
    # systemctl restart networking