Benjamin Budts wrote:
> Gregory Haskins wrote:
>> On Tue, 2007-07-03 at 11:43 +0200, Benjamin Budts wrote:
>>   
>>> 3* When I specify a mac address for my debian virtual machine eth0 
>>> changes to eth3 ... very very weird... it's not that bad, i just changed 
>>> my interfaces config file from eth0 to eth3, but it's a bit weird
>>>     
>> Many linux distros support persistent naming these days.  Therefore,
>> there is some record that in the past eth0 had mac X.  Now it that sees
>> an interface with mac Y, it assumes its a new interface and renames it
>> something unique.
>>
>> I am assuming this is the behavior you are seeing.
>>
>>   
> Aah that would explain why i'm having eth3... I started it up 2 or 3 
> times with another mac as well, so he cached it probably like you said...
> 
> thx for that !

udev manages this.
each time you start udev, it executes
/etc/udev/rules.d/z45_persistent-net-generator.rules that generates eth(X)
definitions according MAC address. A new MAC address creates a new eth(X+1)
interface.

I don't know if it is clean, but to avoid this behaviour, I remove
/etc/udev/rules.d/z45_persistent-net-generator.rules (which is a link).

If you only want to clean this, you can remove only the file
/etc/udev/rules.d/z25_persistent-net.rules which will be re-generated by
z45_persistent-net-generator.rules at next reboot (or udev restart):
rm /etc/udev/rules.d/z25_persistent-net.rules
invoke-rc.d udev stop
invoke-rc.d udev start

Regards,
Laurent
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