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16.04 LTS 上的以太网电缆突然显示“断开”

tag-icon • tag-icon 16.04 networking network-manager ethernet
16.04 LTS 上的以太网电缆突然显示“断开”

在 Ubuntu 16.04 LTS 下，以太网连接多年来一直运行良好，直到今天在启动后出现故障，并因此导致“断开连接”。

到目前为止我已经尝试过：

  • 更换电缆 ->失败的
  • 路由器上的交换端口 ->失败的
  • 安装另一个驱动程序版本（r8168 而不是 r8169），如图所示这里->失败的（另一方面，默认驱动程序直到今天早上都运行良好）
  • 解决方案“设备不受管理”->失败的

一些有用的输出

~$ sudo lshw -C network
*-network
   description: Ethernet interface
   product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: pci@0000:02:00.0
   logical name: ens33
   version: 01
   serial: 00:21:97:18:f3:1a
   size: 10Mbit/s
   capacity: 1Gbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
   configuration: autonegotiation=off broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no multicast=yes port=MII speed=10Mbit/s
   resources: irq:26 ioport:e800(size=256) memory:febff000-febfffff memory:febc0000-febdffff

~$ lspci -vnn | grep -A8 Ethernet
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 01)
Subsystem: Elitegroup Computer Systems RTL8111/8168 PCI Express Gigabit Ethernet controller [1019:8168]
Physical Slot: 33
Flags: bus master, fast devsel, latency 0, IRQ 26
I/O ports at e800 [size=256]
Memory at febff000 (64-bit, non-prefetchable) [size=4K]
Expansion ROM at febc0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169

~$ ifconfig -a
ens33     Link encap:Ethernet  IndirizzoHW 00:21:97:18:f3:1a  
      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
      collisioni:0 txqueuelen:1000 
      Byte RX:0 (0.0 B)  Byte TX:0 (0.0 B)

lo        Link encap:Loopback locale  
      indirizzo inet:127.0.0.1  Maschera:255.0.0.0
      indirizzo inet6: ::1/128 Scope:Host
      UP LOOPBACK RUNNING  MTU:65536  Metric:1
      RX packets:4820 errors:0 dropped:0 overruns:0 frame:0
      TX packets:4820 errors:0 dropped:0 overruns:0 carrier:0
      collisioni:0 txqueuelen:1 
      Byte RX:356896 (356.8 KB)  Byte TX:356896 (356.8 KB)

~$ ethtool ens33
Settings for ens33:
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:  Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 10Mb/s
Duplex: Half
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: off
Current message level: 0x00000033 (51)
               drv probe ifdown ifup
Link detected: no

~$ dmesg | grep -e ens33 -e r8169
[    1.504743] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[    1.505223] r8169 0000:02:00.0 eth0: RTL8168b/8111b at 0xffffc90000788000, 00:21:97:18:f3:1a, XID 18000000 IRQ 26
[    1.505228] r8169 0000:02:00.0 eth0: jumbo features [frames: 4080 bytes, tx checksumming: ko]
[    1.596385] r8169 0000:02:00.0 ens33: renamed from eth0
[   42.533109] IPv6: ADDRCONF(NETDEV_UP): ens33: link is not ready
[   42.564085] r8169 0000:02:00.0 ens33: link down
[   42.564160] IPv6: ADDRCONF(NETDEV_UP): ens33: link is not ready

我别无选择，如果能提供任何关于如何让我的以太网连接恢复工作的想法/建议，我将不胜感激。

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