1) Backup flash on 2400 and move a copy to a FTP server.
2) Get IP connectivity to 3200.
3) Install licenses on 3200 and export the license to a file.
4) Copy the 2400 flashbackup to the 3200.
5) Update the ArubaOS on the 3200 to a release equal to the 2400 or higher.
6) Restore the 2400 flashbackup on the 3200
7) Restore the backup license file.
8) Reboot the 3200 and do not save the configuration.
9) Fix the interfaces on the 3200 controller.
Thanks,
--Kevin.