Hi,
I maybe found a solution ! How about changing the MAC address with use of the cookie ?
You need to enter the priv mode and change the MAC address, here is an example of a Cisco 800 serie router. I assume that this is the same on an Cisco 1242 AP ...
Calculate the cookie password!!
1- Switch the router on and press <CTRL-BREAK> (F5) to enter rommon.
System Bootstrap, Version 12.2(4r)XM2, RELEASE SOFTWARE (fc1)
TAC Support:
http://www.cisco.com/tacCopyright (c) 2002 by cisco Systems, Inc.
C800/SOHO series (Board ID: 20-62) platform with 32768 Kbytes of main memory
rommon 1 > cookie
cookie:
01 01 4f 0f ff 50 06 49 3e 00 01 ff 03 64 00 00
00 00 00 00 00 00 00 00 46 4f 43 06 50 30 50 37
58 04 01 f9 c0 00 00 00 00 ff ff ff 50 06 49 1f
1c 04 ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Start the calculator in Windows and select the Scientific version.Choose for HEX and QWORD.The calculation is as follows:01 01 + 4f 0f + ff 50 + 06 49 + 3e 00. After each four characters press the add-button(+). At the end you should get this result: 193A9. The password is the last 4 characters 93A9.
rommon 2>priv
Password: 93A9
You now have access to the full set of monitor commands.
Warning: some commands will allow you to destroy your
configuration and/or system images and could render
the machine unbootable.
rommon 4 >
A/