☰

以太网已断开连接，显示在 ifconfig 中

tag-icon • tag-icon 11.04 internet networking ifconfig
以太网已断开连接，显示在 ifconfig 中

我运行的是 11.04，没有 remix。安装后，我可以使用无线网络，但不能使用以太网。当我单击连接菜单项时，它显示

Wired Network
disconnected

我该如何解决？

以下是以太网部分ifconfig：

eth0      Link encap:Ethernet  HWaddr 00:16:36:86:f3:43  
      UP BROADCAST MULTICAST  MTU:1500  Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
      Interrupt:17

结果是lspci：

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5788 Gigabit Ethernet (rev 03)
02:09.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
02:09.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller
02:09.4 Communication controller: Texas Instruments PCIxx12 GemCore based SmartCard controller
08:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Net

我的/etc/network/interfaces样子是这样的：

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

但我没有得到任何输出sudo ifconfig eth0 up。

输出自nm-applet：

** (nm-applet:1824): DEBUG: old state indicates that this was not a disconnect 0
** (nm-applet:1824): DEBUG: old state indicates that this was not a disconnect 0

第二次运行时nm-applet：

** (nm-applet:2752): DEBUG: old state indicates that this was not a disconnect 0
** (nm-applet:2752): DEBUG: old state indicates that this was not a disconnect 0

** (nm-applet:2752): WARNING **: _nm_object_get_property: Error getting 'WpaFlags' for /org/freedesktop/NetworkManager/AccessPoint/10: (19) Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist



** (nm-applet:2752): WARNING **: _nm_object_get_property: Error getting 'RsnFlags' for /org/freedesktop/NetworkManager/AccessPoint/10: (19) Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist



** (nm-applet:2752): WARNING **: Error in getting active connection 'Vpn' property: (19) Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist


** (nm-applet:2752): WARNING **: _nm_object_array_demarshal: couldn't create object for /org/freedesktop/NetworkManager/ActiveConnection/0
** Message: <info>  No keyring secrets found for Auto HeyJude88/802-11-wireless-security; asking user.


** (nm-applet:2752): WARNING **: applet.c.2882 (applet_settings_new_secrets_requested_cb): couldn't find details for connection
** Message: <info>  No keyring secrets found for Auto HeyJude88/802-11-wireless-security; asking user.

** (nm-applet:2752): DEBUG: going for offline with icon: notification-network-wireless-disconnected
** (nm-applet:2752): DEBUG: foo_client_state_changed_cb
** (nm-applet:2752): DEBUG: foo_client_state_changed_cb
** (nm-applet:2752): DEBUG: foo_client_state_changed_cb
** (nm-applet:2752): DEBUG: going for offline with icon: notification-network-wireless-disconnected
** (nm-applet:2752): DEBUG: foo_client_state_changed_cb

更多内容如下ifconfig：

wlan0     Link encap:Ethernet  HWaddr 00:18:de:31:70:20  
          inet addr:172.16.6.210  Bcast:172.16.6.255  Mask:255.255.255.0
          inet6 addr: fe80::218:deff:fe31:7020/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2384 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1367 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:514654 (514.6 KB)  TX bytes:215138 (215.1 KB)

答案1

编辑接口文件以删除

auto eth0
iface eth0 inet dhcp

保存重启，使用网络管理器编辑连接，设置为自动连接。

此命令将在 Gedit 中打开接口文件并具有保存文件的权限：

sudo gedit /etc/network/interfaces

我有有线和无线连接，并且我的接口文件中只有这两行

auto lo
iface lo inet loopback

我从经验中发现，任何其他东西都无法阻止连接，而移除多余的东西可以解决问题。

答案2

  1. 基本第 1 层接地检查 - 您的以太网端口是否已连接，您确定电线和调制解调器端口是否正常？连接电线时，请确认以太网端口指示灯是否闪烁（绿色或琥珀色）。否则，这是物理层问题。它是否在同一个交换机端口的其他机器上工作？

  2. 假设上述内容已得到解决，您尝试过吗sudo ifconfig eth0 up？

  3. 另外，检查你的/etc/network/interfaces文件，看看是否有以下行

    自动 eth0

    这将在启动时自动启用 eth0

答案3

如果你执行我在评论中提到的第一个命令

killall -9 nm-applet

然后

sudo service network-manager stop

这将停止网络管理器服务然后输入此命令

sudo rm /var/lib/NetworkManager/NetworkManager.state

这将删除 NetworkManager.state 文件，不用担心，此文件将被重新生成，然后使用此命令重新启动网络管理器服务

sudo service network-manager stop

最后用这个命令重新启动 nm-applet

nohup nm-applet &

现在应该就可以连接了。

发生这种情况的原因是上次网络断开是由于崩溃。由于崩溃可能与网络连接有关，因此暂时禁用它以允许您重新启动并修复问题，然后再重新启用连接。

相关内容