linux-kernel - Re: Strange ethN numbering problem.

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Message-Id: <20070109040616.ED8C460BE75@tzec.mtu.ru>
Date:	Tue, 09 Jan 2007 07:06:15 +0300
From:	Andrey Borzenkov <arvidjaar@...l.ru>
To:	John Clark <jclark@...ricsystems.com>, linux-kernel@...r.kernel.org
Subject: Re: Strange ethN numbering problem.

John Clark wrote:

> Bernd Eckenfels schrieb:
>> In article <45A2E19F.4070307@...ricsystems.com> you wrote:
>>   
>>> However, when the system comes up and attempt to do an ifconfig, the
>>> 'ethN' numbers
>>> have changed to a some what intermengled seriese starting with eth6...
>>> eth10.
>>>     
>>
>> maybe a system startup script is renaming them (in order to give them
>> well known numbers)?
>>
>> What kind of distribution is that? is this a new problem? Have a look in
>> /etc/mactab.
> 
> This is not a 'new' distribtution. In fact, the disk was used for a
> previous hardware box, of the same
> manufacturer and allegedly the same cpu mother board.
> 

Then quite likely it remembered lower numbers for "old" interfaces and
starts renaming with next available.

> The kernel is 2.6.19.1 the at-that-moment current linux kernel.
> 
> What should I look for in terms of interface renaming.

I guess in udev rules; look also if you have /etc/iftab. The best you can do
is asking in lists/groups dedicated to your distribution.

-andrey

> What is also sort 
> of strange is that they all
> have the same 'mac' address vendor unique id... even though two
> interfaces are for an Intel
> ethernet chip, and the othe 4 are from the Marvel chip.
> 
> Thanks
> John Clark


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