RE: Multiple Boards with same MAC addresses - problem.

RE: Multiple Boards with same MAC addresses - problem.

[Christopher Dumoulin]

Do you have some non-volatile memory to work with? You could store MAC
addresses for each individual board in non-volatile memory, then read the
MAC address from there each time U-Boot runs, and program your Ethernet
ports accordingly.

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Message: 1
Date: Tue, 10 Apr 2007 16:51:04 +0200
From: powerpc440 <powerpc440@googlemail.com>
Subject: Multiple Boards with same MAC addresses - problem.
To: linuxppc-embedded@ozlabs.org
Message-ID: <461BA458.2010605@googlemail.com>
Content-Type: text/plain; charset=ISO-8859-1

Hello all,

I have multiple boards, based on ppc405ep (which include on-chip two
ethernet ports). I'm configure the MAC address in u-boot and all works
great. The problem appears when I use two or more boards in one network,
because the MAC addresses are the same. Now I'm making a own u-boots for
each board, but this solution is not very comfortable.
My question is, which is the standard way to resolve such problem? I
would have only one generic u-boot. Is this possible?


Best regards,

Zhivko Yordanov


------------------------------

Multiple Boards with same MAC addresses - problem.

[powerpc440]

Hello all,

I have multiple boards, based on ppc405ep (which include on-chip two
ethernet ports). I'm configure the MAC address in u-boot and all works
great. The problem appears when I use two or more boards in one network,
because the MAC addresses are the same. Now I'm making a own u-boots for
each board, but this solution is not very comfortable.
My question is, which is the standard way to resolve such problem? I
would have only one generic u-boot. Is this possible?


Best regards,

Zhivko Yordanov

Re: Multiple Boards with same MAC addresses - problem.

[Ben Warren]

Zhivko,

On Tue, 2007-04-10 at 16:51 +0200, powerpc440 wrote:
> Hello all,
> 
> I have multiple boards, based on ppc405ep (which include on-chip two
> ethernet ports). I'm configure the MAC address in u-boot and all works
> great. The problem appears when I use two or more boards in one network,
> because the MAC addresses are the same. Now I'm making a own u-boots for
> each board, but this solution is not very comfortable.
> My question is, which is the standard way to resolve such problem? I
> would have only one generic u-boot. Is this possible?
> 
> 
> Best regards,
> 
> Zhivko Yordanov

Please post to the U-boot mailing list.  There's no reason why you
should need to custom build for each board.  

You need to create some kind of board calibration procedure where each
board is assigned a unique MAC address, and then save it in U-boot.  If
your problem is that your unique U-boot MAC addresses don't make it to
Linux, the people on the U-boot list can give you direction.

regards,
Ben

Re: Multiple Boards with same MAC addresses - problem.

[Wolfgang Denk]

In message <461BA458.2010605@googlemail.com> you wrote:
> 
> I have multiple boards, based on ppc405ep (which include on-chip two
> ethernet ports). I'm configure the MAC address in u-boot and all works

You should post U-Boot related questions to the U-Boot-Users mailing
list. They are off topic here.

> great. The problem appears when I use two or more boards in one network,
> because the MAC addresses are the same. Now I'm making a own u-boots for
> each board, but this solution is not very comfortable.

Maybe you should start reading the manual and get a clue about the use
of environment variables in U-Boot.

> My question is, which is the standard way to resolve such problem? I
> would have only one generic u-boot. Is this possible?

Of  course  it  is.  Just  use  different  settings  of  the  ethaddr
environment variables.

Best regards,

Wolfgang Denk

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