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笔记本电脑无法连接到有线互联网

tag-icon • tag-icon networking internet network-manager ethernet wired
笔记本电脑无法连接到有线互联网

Ubuntu 14.04。它可以检测到有线连接，但无法获取 IP 地址。我尝试过不同的有线网络，每次都遇到同样的问题，无论是使用 nm-applet 还是 wicd。我的另一台计算机可以毫无问题地连接到我的家庭网络。

它没有被阻止，无论是软的还是硬的。我尝试了建议这里但它并没有改变任何东西。需要注意的一点是，电缆不直接连接到笔记本电脑，而是通过专有连接器。这是 ifconfig 的输出：

eth0      Link encap:Ethernet  HWaddr 24:f5:aa:c2:58:c7  
          inet6 addr: fe80::26f5:aaff:fec2:58c7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:378 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:8058 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8058 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2163118 (2.1 MB)  TX bytes:2163118 (2.1 MB)

wlan0     Link encap:Ethernet  HWaddr 6c:29:95:19:08:1b  
          inet addr:192.168.1.133  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::6e29:95ff:fe19:81b/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2280079 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1500378 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2912209727 (2.9 GB)  TX bytes:186227404 (186.2 MB)

这是 /etc/network/interfaces 的内容

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp

这是 的输出sudo lspci -vvnn | grep -iA 10 ethernet。

03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
    Subsystem: Samsung Electronics Co Ltd Device [144d:c109]
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 0, Cache Line Size: 64 bytes
    Interrupt: pin A routed to IRQ 61
    Region 0: I/O ports at e000 [size=256]
    Region 2: Memory at f7c00000 (64-bit, non-prefetchable) [size=4K]
    Region 4: Memory at f0000000 (64-bit, prefetchable) [size=16K]
    Capabilities: [40] Power Management version 3
        Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)

答案1

手动设置网络配置。为此，请按照以下命令操作：

ifconfig eth0 192.168.31.3 netmask 255.255.255.0 up

（IP 和网络掩码仅作为示例）

sevice networking restart

答案2

加入/etc/network/interfaces

（此为示例）

iface eth0 inet static
address 192.168.1.200
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1

然后

sudo /etc/init.d/networking restart

此方式使用静态 IP 地址。

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