Re: changing MAC address

[chris () STRICTLY NOSUCKAZ NET (chris () STRICTLY NOSUCKAZ NET)]

This happens when your trying to modify the MAC and the interface
is marked 'UP', older versions of linux (i beleive 2.0.x used to
let you change a live mac (software change only!!)), but recent vers
i've found do not let you do this anymore..

I usually use 'changemac', which notes you probrably have to have the
ethernet down:

--/snip/--

changemac - soft change MAC address of your ethernet card
changemac -l | [-d number ] [ -r | -a address ]
before you try to use it just turn ethernet card off, ifconfig ethX down
-d number    number of ethernet device
-h           this help
-a address   address format is xx:xx:xx:xx:xx:xx
-c number    number in list of known cards that we will use
-r           set random generated address
-s           list first three MAC bytes of known ethernet vendors
-l           same as -l but you dont have to type | more
example: changemac -d 1 -a 12:34:56:78:9a:bc

--/snip/--

Chris.

On Wed, 29 Mar 2000, Arturo Busleiman wrote:

`->This is question regarding an old thread.
`->
`->> as an example, under linux, as root:
`->>
`->>   ifconfig eth0 hw ether 00:aa:23:ce:3a:11
`->>
`->> changes the mac address of eth0 to 00:aa:23:ce:3a:11, iirc.
`->
`->        [root@machine /root]# ifconfig eth0 hw ether 00:aa:23:ce:3a:11
`->        SIOCSIFHWADDR: Device or resource busy
`->
`->why does this happen? under which circumstances can I use ifconfig for
`->that purpose?
`->
`->
`->*> Panic? My kernel doesn't panic! We are doomed! DustDustDust!!!!
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`->