Changing MAC address

[Arunvijai_4]

Tried with lanadmin, didn't succeed though

# lanadmin -A 0x000000000000 1
Old Station Address = 0x001083f6cd7e
error: expected primitive 0x06, got DL_ERROR_ACK
dl_error_primitive = 0x33
dl_errno = 0x04
dl_unix_errno = 22
change_phys_addr: unable to change physical address

[Arunvijai_4]

I am trying to simulate and test a customer issue.

[Roland Piette]

Hi Arunvijai,

Before using lanadmin -A command you need to bring down your interface with ifconfig command. After setting the new address the interface will be bring up.

To get back the factory address you can use -A DEFAULT keywords in lanadmin command.

Regards

[rick jones]

I suspect this bringing down the interface would include an "unplumb" ifconfig command.

The only place I would initially see a MAC address of all zeros would be a broken NIC, which would seem to be a HW replacement issue?

[Arunvijai_4]

Yes, I brought down and unplumb the interface and tried changing using lanadmin -A; still the same error persists.

[rick jones]

It is quite possible that the code in the kernel is making some sanity checks of the MAC address and deciding it does not like the MAC address at all (not surprising since all zeros used to be - long long long ago - a broadcast address). You might try changing just a single bit or two from the existing MAC address and try setting the card to that - I would change a couple bits in the middle somewhere.