Alter Ethernet MAC

Added by Mostafa Afgani about 9 years ago

Hi, is it possible to alter the 'burned-in' MAC address of an L138F? I know that I can change it using 'ifconfig eth0 hw ether XX:XX:XX:XX:XX:XX' once Linux is up and running but was wondering if it's possible to make this change persistent and active early in the boot process (so hopefully a solution other than a low numberd rc script).

Replies (3)

RE: Alter Ethernet MAC - Added by Jonathan Cormier about 9 years ago

Mostafa,

We store the mac address on a eeprom on the SoM. The settings stored on this can be accessed using the factoryconfig command in U-boot. Beware that you can brick the SOM if you change some of the other fields.

U-Boot > factoryconfig
Factory Configuration:
Config Version : 1.1
MAC Address : 00:50:C2:E6:76:74
Serial Number : 120189
FPGA Type : 4 [XC6SLX45]
Part Number : L138-FI-225-RC

U-Boot > help factoryconfig
factoryconfig - mitydsp-l138 factory config block operations

Usage:
factoryconfig     - print current configuration
factoryconfig set
         - set new configuration
factoryconfig save
         - write new configuration to I2C FLASH

RE: Alter Ethernet MAC - Added by Michael Williamson about 9 years ago

You might also try this technique, though I am not sure if the current version of the 3.2 kernel has this command line option implemented:

http://developer.ridgerun.com/wiki/index.php/How_to_pass_ethernet_address_to_linux_kernel_ethernet_driver

-Mike

RE: Alter Ethernet MAC - Added by Mostafa Afgani about 9 years ago

Thanks Jonathan, that's exactly what I was after.

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