On some platforms, the alternative to using biosconfig to control the boot order is IPMI commands, which can also make persistent changes to the boot order through the service processor. This interface can only specify which is the highest priority category of boot devices. This operation is equivalent to entering BIOS setup and moving an entire category of devices to the top of the boot list (for example, moving all disks to boot before CD-ROMs).
The following ipmitool raw commands work just like the ipmitool chassis bootdev commands. During BIOS POST, the BIOS asks the SP for boot flags. The raw commands have just one extra bit set (the persistent bit), which causes the BIOS to reorder the boot list and save that order in CMOS. These ipmitool commands can also be issued through the host SP Keyboard Controller Style (KCS) interface if you have the IPMI drivers installed on the host Linux system.
ipmitool -H ... -U root -P ... raw 0x0 0x8 0x5 0xC0 0x14 0x0 0x0
The BIOS boot order changes so that any CD/DVD attempts to boot first. On Sun Blade X6275 this could be a USB external CD/DVD-ROM drive or a JavaConsole-redirected CD. The BIOS setup reflects the change in the boot order.