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Ubuntu Server 20.4.1 *-网络已禁用

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Ubuntu Server 20.4.1 *-网络已禁用

今天早上我的服务器还在运行。我想应用最新的设置更新，但在应用之前，我决定重启一下以清理一下。

重启后，网络没有恢复。我从 USB 启动，可以访问网络。所以我知道这不是卡、电缆或外部的问题。

以下是 lshw -C 网络的输出：

  *-network DISABLED
   description: Ethernet interface
   product: 82579LM Gigabit Network Connection (Lewisville)
   vendor: Intel Corporation
   physical id: 19
   bus info: pci@0000:00:19.0
   logical name: eth1
   version: 04
   serial: 34:17:eb:a1:64:a1
   capacity: 1Gbit/s
   width: 32 bits
   clock: 33MHz
   capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.13-4 latency=0 link=no multicast=yes port=twisted pair
   resources: irq:27 memory:f7d00000-f7d1ffff memory:f7d39000-f7d39fff ioport:f080(size=32)


*-network DISABLED
       description: Ethernet interface
       product: DGE-528T Gigabit Ethernet Adapter
       vendor: D-Link System Inc
       physical id: 2
       bus info: pci@0000:01:02.0
       logical name: eth0
       version: 10
       serial: c4:12:f5:33:9b:5f
       width: 32 bits
       clock: 66MHz
       capabilities: pm bus_master cap_list rom ethernet physical
       configuration: broadcast=yes driver=r8169 latency=32 link=no maxlatency=64 mingnt=32 multicast=yes
       resources: irq:18 ioport:e000(size=256) memory:f7c20000-f7c200ff memory:f7c00000-f7c1ffff

以下是我从“ip a”获得的结果：

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
   valid_lft forever preferred_lft forever
inet6 ::1/128 scope host 
   valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether c4:12:f5:33:9b:5f brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 34:17:eb:a1:64:a1 brd ff:ff:ff:ff:ff:ff

如果我执行“ip link set eth0 up”和“ip link set eth1 up”然后执行“ifconfig”，看起来我得到了一个 IPv6 地址，但没有 IPV4。

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet6 fe80::c612:f5ff:fe33:9b5f  prefixlen 64  scopeid 0x20<link>
    ether c4:12:f5:33:9b:5f  txqueuelen 1000  (Ethernet)
    RX packets 192  bytes 20095 (20.0 KB)
    RX errors 0  dropped 12  overruns 0  frame 0
    TX packets 6  bytes 516 (516.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 34:17:eb:a1:64:a1  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xf7d00000-f7d20000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 7768  bytes 551888 (551.8 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7768  bytes 551888 (551.8 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

这是我的 /etc/netplan/ 文件

# This is the network config written by 'subiquity'
network:
  version: 2
  renderer: networkd
  ethernets:
    enp1:
      dhcp4: true
      dhcp6: false

任何知道到底发生了什么事（顺便说一句...如果我重新启动，它就会回到被禁用的状态）。

答案1

请注意，您的以太网接口是 eth0 和 eth1；这对于 Ubuntu 20.04 来说相当不寻常。还请注意，netplan 文件尝试配置更常见的 enp1。请更改 netplan 文件以将 eth0 替换为 enp1。接下来，执行

sudo netplan generate
sudo netplan apply

查看：

ip addr show

有改善吗？

答案2

我将 .yaml 文件更改为以下内容：

网络：版本：2 渲染器：networkd 以太网：enp1：dhcp4：true 匹配：macaddress：c4：12：f5：33：9b：5f 设置名称：enp1

这是我知道有电缆的接口的 MAC 地址。这有效。重启后，我顺利获得了我的 IPV4 地址。不知道是什么改变了它无法找到几周前连接的接口。

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