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Subject: Re: NICs trading places ?
From: Sean Neakums <sneakums@zork.net>
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Date: Fri, 28 Mar 2003 23:42:51 +0000
In-Reply-To: <Pine.LNX.4.44.0303281626260.20589-100000@mooru.gurulabs.com> (Dax
 Kelson's message of "Fri, 28 Mar 2003 16:30:20 -0700 (MST)")
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commence  Dax Kelson quotation:

> On Fri, 28 Mar 2003, Dave Jones wrote:
>
>> I just upgraded a box with 2 NICs in it to 2.5.66, and found
>> that what was eth0 in 2.4 is now eth1, and vice versa.
>> Is this phenomenon intentional ? documented ?
>> What caused it to do this ?
>
> I've seen the same thing for 5+ years.  Multiple things can 
> trigger it, eg:
>
> Always having your NIC drivers compiled in, and then moving between 
> different kernel versions.
>
> Going from modular NIC drivers to compiled in drivers can bite you.
>
> Isn't life fun.

Something I have been meaning to write as soon as I get bitten by this
myself is a script that uses the "ip link set X name Y" command
(possibly in conjuction with a MAC-to-name map, or else just a simple
sort) to name the interfaces consistently.

-- 
Sean Neakums - <sneakums@zork.net>
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