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I am facing a strange issue. Yesterday, I powered off my Ubuntu 10.04 LTS server by mistake. Since then networking is not working. The interface which was in use was configured as eth1 but now it doesn't show any ethernet devices when I do ifconfig -a. It just shows loopback and virbr0 interfaces, no ethernet interfaces. Here is ifconfig output.

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:16436  Metric:1
          RX packets:1192 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1192 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:395779 (395.7 KB)  TX bytes:395779 (395.7 KB)

virbr0    Link encap:Ethernet  HWaddr ea:8d:e0:cd:aa:a1  
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          inet6 addr: fe80::e88d:e0ff:fecd:aaa1/64 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:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Below is the output of sudo lshw -C networking

  *-network UNCLAIMED
       description: Ethernet controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       version: 05
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list
       configuration: latency=0
       resources: memory:fe400000-fe41ffff memory:fe428000-fe428fff ioport:f080(size=32)

And here is the /etc/interfaces file which was in use and working great till this happened. I had many virtual interfaces configured as well.

auto lo eth1 eth1:1 eth1:2 eth1:3 eth1:4 eth1:5 eth1:6 eth1:7 eth1:8 eth1:9 eth1:10
iface lo inet loopback

iface eth1 inet dhcp

iface eth1:1 inet static
    address 192.168.1.201
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:2 inet static
    address 192.168.1.202
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:3 inet static
    address 192.168.1.203
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:4 inet static
    address 192.168.1.204
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:5 inet static
    address 192.168.1.205
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:6 inet static
    address 192.168.1.206
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:7 inet static
    address 192.168.1.215
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:8 inet static
    address 192.168.1.216
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:9 inet static
    address 192.168.1.220
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

iface eth1:10 inet static
    address 192.168.1.225
    netmask 255.255.255.0
    broadcast 192.168.1.255
    network 192.168.1.0

Any help would be highly appreciated.

eth.block
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1 Answers1

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Did a Kernel update happen before the restart? There appear to be some similar cases of UNCLAIMED interfaces which apparently is due to inability to find a driver for it.

Community
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Karthik T
  • 2,031