replaced NIC, now no network

Thilo Six T.Six at
Thu Sep 14 14:52:30 UTC 2006

Felix Miata wrote the following on 14.09.2006 15:34:
> On 06/09/13 21:33 (GMT-0400) Felix Miata apparently typed:
>> I disabled the onboard eth0 NIC and installed a PCI NIC. On reboot,
>> Etch, Xandros and Knoppix all figured out how to use the new device
>> instead of the old one. In Kubuntu I now have no network.
>> /etc/network/interfaces remains untouched since before the swap, making
>> no direct reference to the hardware device.
>> doesn't
>> address much of anything. In system settings -> network settings there
>> is a disabled eth1 and no eth0, and no apparent way to remove the bogus
>> device or add and configure the new eth0. How do I solve this in 6.06?
> After writing the above I shut down for the night. On booting back up
> this AM to follow the advice given in reponse, I found:
> 1-eth0 is working
> 2-eth1 is gone from network settings
> 3-no changes to network-relevant config files in /etc
> Thanks to those who responded.

after changing your NIC you should also have a look at /etc/iftab.

alter the mac adress (which is the number like 04:cb:fa:bb:8e:ed)
to your new one which can be found with

ifconfig | grep HWaddr
eth0      Link encap:Ethernet  HWaddr 04:CB:FA:BB:8E:ED

bye Thilo
i am on Ubuntu 2.6 KDE
- some friend of mine

gpg key: Ox4A411E09

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