Network changing from eth0 to eth1

[Bill Davidsen]

Nat Gross wrote:
> On Mon, Nov 3, 2008 at 3:09 PM, Phil Meyer <pmeyer at themeyerfarm.com> wrote:
>> Jim wrote:
>>> FC8, KDE
>>> What is changing the Network settings from eth0 to eth1 ?
>>>
>>> Even if you go into /etc/sysconfig/network-scripts/ifcfg-eth0 and setup as
>>> eth0, and reboot box,it will change settings to eth1.
>>>
>>> And it is causing a unstable network.
>>>
>>> This box only has one ethernet card in  it.
>>>
>>
>> Now days, when Fedora detects a different NIC from one it knew (right or
>> wrong), it creates a new entry in: /etc/udev/rules.d/70-persistent-net.rules
>>
>> This is why you get messages in dmesg and at bootup that eth0 is being
>> 'moved' to eth1.
>>
>> It is reasonably safe to remove this file, plus
>> /etc/sysconfig/network-scripts/ifcfg-eth? and reboot.
>>
>> If you are just doing DHCP, then udev will recreate the file, put the
>> correct NIC into it, and set up a generic ifcfg-eth0 script.
>>
>> Good luck!
>>
> Thanks for this post, it helped me a bit, but I still have nameserver problem.
> Yesterday my [only]nic in a 32 bit fc8 box blew. When I replaced it,
> it insisted to be eth1 and gave me eth0 errors when booting. I did an
> ifconfig 192.168.... and had eth1 up and running.

You did change the MAC address in the config, to reflect the change right? 
Otherwise eth0 will go to the old MAC address even if not present, and the next 
NIC found will be eth1, eth2, etc.

-- 
Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot