Error changing Mac address SIOCSIFHWADDR Cannot assign requested address

Question

I am trying to change my Mac Address but I am facing a problem. When I run the command:

ifconfig eth0 hw ether 11:22:33:44:55:66

I am getting the following error:

SIOCSIFHWADDR: Cannot assign requested address

Answer 1

I can see that you are trying the set the Mac address to 11:22:33:44:55:66. And that's the problem. You can only set unicast address and unicast address has to have the first octet as an even value. Try changing the value of the first octet to even (ex: 12:22:33:44:55:66) and it should work.

Comments

thanks for this information

Thanks a Lot......!!!!

Answer 2

bro first byte must be even. you can use 22:33:44:55:66:77

Comments

Thanks bro. But why can't I use even byte?