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  1. #1

    ethernet not working

    Hi everyone. I am kind of a novice with linux.

    Anyway, I have a special board with 2 embedded ethernet nics.

    I am running a special modified version of SUSE linux.

    One of them (eth0) is working fine.

    the other one (eth1) does not work. It does not show up at all.

    What could be wrong?

    eth0      Link encap:Ethernet  HWaddr 00:10:EC:01:00:0B
              inet addr:  Bcast:  Mask:
              inet6 addr: 2002:90b:e002:696:210:ecff:fe01:b/64 Scope:Global
              inet6 addr: fe80::210:ecff:fe01:b/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:962160 errors:0 dropped:0 overruns:0 frame:0
              TX packets:30883 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:119905442 (114.3 Mb)  TX bytes:2442501 (2.3 Mb)
    lo        Link encap:Local Loopback
              inet addr:  Mask:
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:16436  Metric:1
              RX packets:192 errors:0 dropped:0 overruns:0 frame:0
              TX packets:192 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0
              RX bytes:16228 (15.8 Kb)  TX bytes:16228 (15.8 Kb)
    I kept checking on this issue.

    when I run...

    dmesg |grep -i eth0

    I get information returned. When I run

    dmesg |grep -i eth1

    Nothing is returned.

    I also looked at the device tree for this linux build.

    I see entries for eth0 and eth1. Although I do not know what the values should or should not be.
    Last edited by karozans; 08-31-2011 at 11:40 PM.

  2. #2
    Just Joined!
    Join Date
    Aug 2011
    London, UK
    Try adding eth1 manually first:

    /sbin/ifconfig eth1 netmask

    If that works you'll need to add the interface manually, unless you have a dhcp server-

  3. #3
    SIOCSIFADDR: No such device
    eth1: unknown interface: No such device
    SIOCSIFNETMASK: No such device

  4. $spacer_open
  5. #4
    Just Joined!
    Join Date
    Aug 2011
    London, UK
    OK, that makes sense.
    Before going into the various troubleshooting options, have you tried booting the system with a live CD, such as Knoppix? Try a few so see if any pick up both interfaces. If none do then the hardware on eth1 may not be working. If some do then it'll be a driver issue. You're not running any virtual systems are you (Xen, VMware etc)?

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