In message 004101c414cb$413426f0$af00a8c0@tidelpark.isofttechindia.com you wrote:

u-boot is not accepting me to change the ethernet address. Is there any

specific reasons for it.

This is done so intentionally. Read the documentation: http://www.denx.de/twiki/bin/view/DULG/UBootEnvVariables

There are variables (MAC address, serial number, etc.) which are supposed to be set once by the manufacturer of the board, and which do not need to be changed after that, and/or where the end user should not be able to change them. This is what you see.

Is there any way to change the MAC address in my EEPROM?

Yes, of course. Everything is possible in software.

And BTW: please NEVER send non-administrative messages to the u-boot-users-request@lists.sourceforge.net address; the mailing list address is u-boot-users@lists.sourceforge.net

Best regards,

Wolfgang Denk