How to fix MAC Address change after reboot ?

[Elia]

Hi,

I install Linaro 13.11 Server version of Operating System, but when I restart Radxa I see that the MAC address constantly change.

Is there any way to fix Mac address change ?

Greetings 

Elia

[Tom Cubie]

Hi, The latest kernel can get a fix MAC address by passing the
"mac_addr=xx:xx:xx:xx:xx:xx" cmd line to kernel.

https://github.com/linux-rockchip/rockchip-3.0/commit/6187f5da2e9f2b164bd8e8cb36b963ddceb3d1d1

You need
1. build the latest kernel and make a boot.img and flash it to boot
partition, instructions are here:
http://wiki.radxa.com/Rock/Booting_Linux

2. edit your parameter file and add mac_addr=xx:xx:xx:xx:xx:xx in
kernel cmd line and flash the parameter


A pre-built latest boot.img can be found here:
http://dl.radxa.com/rock/images/ubuntu/2014-02-20/boot.img
An example parameter file can be found here:
http://dl.radxa.com/rock/images/ubuntu/2014-02-20/parameter

You can just flash them to get a fixed mac address.

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> Elia
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[Elia]

Tom,
thanks for your reply as soon as possible I try and let you know.
Greetings.
Elia

[Andrei Basangiu]

Hello,

I just flashed the boot.img and parameter file, but still, after every reboot, the board has a different MAC address.
What I did was:

Rockusb>DI -b boot.img
Download boot start...
Download image ok.
Rockusb>DI -p paramfile
Download parameter ok.
Rockusb>q

Is there anything else I'm missing?

Regards,
Andrei

[Haggy]

I found a workaround to this problem.  While I would rather have the kernel provide me with a MAC, simply adding one line to the /etc/network/interfaces file seems to bee generating the MAC I want:

auto eth0
iface eth0 inet dhcp
       hwaddress ether 01:02:03:04:05:06

Obviously I used a different address than that, but you get the picture.

[Andrei Basangiu]

Hello,

I tried adding the hwaddress to the configuration file too. But this (or setting a static ip address) makes the board not boot properly after a reboot.

What I mean is the board boots up to ""vbus detect", gets over that and displays 4 more traces and then just stays like that. Root user doesn't login automatically and the ethernet LEDs don't light up anymore, so I have no more SSH access.

I tried fixing the problem by booting from a lubuntu-desktop rootfs on my microSD and removing the settings from nand, but even with them removed, it behaves the same. This happens on a linaro-server rootfs by the way.

Any of you encountered this while setting up a hwaddress or static ip in the /etc/network/interfaces config file?

Andrei

[Elia]

I have the same problem.
I download http://dl.radxa.com/rock/images/ubuntu/2013-12-17/rootfs-server.img and write it to first ext4 SD partition, then I write parameter and boot.img with RKDevelopTool ( in parameter i modify "root=/dev/mmcblk0p1"), but the boot stop after "vbus detected".

[Haggy]

I also have the problem with not being able to get far past the vbus search if I try to use the boot.img and parameters file provided by Tom.  That's why I ended up working around the problem with the interfaces file.  I can get it to work if I first low-level format the nand, then install either the server img or the "raring" img, then go and flash only the parameters file (which I incidentally edited to make a larger rootfs partition).

[Alex]

Am Montag, 3. März 2014 02:57:30 UTC+1 schrieb Haggy:

I also have the problem with not being able to get far past the vbus search if I try to use the boot.img and parameters file provided by Tom.  That's why I ended up working around the problem with the interfaces file.  I can get it to work if I first low-level format the nand, then install either the server img or the "raring" img, then go and flash only the parameters file (which I incidentally edited to make a larger rootfs partition).

Might be this problem

https://groups.google.com/forum/embed/?place=forum/radxa#!topic/radxa/I4_rwGwAU1E

but you should open a new thread if you have a new problem than the one described in the title.

Alex