Error changing Mac address: SIOCSIFHWADDR: Cannot assign requested address

0 votes

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
Feb 6, 2019 in Cyber Security & Ethical Hacking by Roshan
1,164 views

2 answers to this question.

+1 vote

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.

answered Feb 6, 2019 by Omkar
• 69,000 points
+1 vote
bro first byte must be even. you can use 22:33:44:55:66:77
answered Jul 18, 2019 by code_coder__
Thanks bro. But why can't I use even byte?

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