Error on network card

Linux and Unix-Like Ubuntu
1

Hi

Please can you help me to understand what could be wrong based on what I have captured in the logs:
I have run

cat /var/log/syslog | grep -i warn

, and I got the following output

NetworkManager[7016]: <warn> Activation (eth3) failed.
Dec 23 10:58:25 cmoveldb02 NetworkManager[7016]: <warn> (eth3): DHCPv4 request timed out.
Dec 23 10:58:25 cmoveldb02 NetworkManager[7016]: <warn> Activation (eth3) failed.

the system is running

ubuntu 12.04

I have run

ifconfig -a

, and got the following:

 ifconfig -a
eth2      Link encap:Ethernet  HWaddr 00:23:8b:41:b4:9c
          inet addr:192.168.6.24  Bcast:192.168.6.31  Mask:255.255.255.224
          inet6 addr: fe80::223:8bff:fe41:b49c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:761426 errors:0 dropped:0 overruns:0 frame:0
          TX packets:774305 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:139384970 (139.3 MB)  TX bytes:109771872 (109.7 MB)
          Interrupt:16 Memory:fcde0000-fce00000

eth3      Link encap:Ethernet  HWaddr 00:23:8b:41:b4:9d
          inet6 addr: fe80::223:8bff:fe41:b49d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:346190 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:77978155 (77.9 MB)
          Interrupt:17 Memory:fcd80000-fcda0000

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:2325747 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2325747 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:348097678 (348.0 MB)  TX bytes:348097678 (348.0 MB)
2

Hello fretagi,

You can check to see the status of a DCHP update by running this in a terminal:

sudo dhclient eth0 # assuming eth0 is your network adapter

That will try and get the network settings up and going and it will tell you what it's trying to do (so if it does make contact and then fails, you should see the result). If it doesn't make contact, you'll see it going on and on and on.

Thanks,
R. Singh

3

I know that these may be a daft questions, but:-

  • What are you expecting?
  • Do you have cables in all the cards, connected to switches etc.?
  • Are your definition files set up (presuming it's /etc/sysconfig/network-scripts/ifcfg-eth3 in this case)
  • Should it/they be DHCP or STATIC addresses?
  • If DHCP, is there a server that can service the DHCP request?

I'm just trying to get a better picture of your needs to make sure we get you the best answers.

Thanks, in advance,
Robin