5-1
5
Software Maintenance
Introduction
Files
BootROM program file
The file is used for booting application at boot. A complete BootROM file includes two segments: basic
and extended.
Application program file
The router is available with Dual Image function. By default, the system defines and attempts to boot in
order with three boot files: main, backup, and secure, provided they are available with CF card. If the
router fails to boot with the secure boot file, it prompts the boot failure. For more information about the
boot files, refer to section “Maintaining Application Program and Configuration File”.
The following table gives default names and types of boot files.
Table 5-1
Default names and types of the boot files
Boot file
File name
File type
Main boot file
main.bin
M
Backup boot file
backup.bin
B
Secure boot file
secure.bin
S
z
The application programs for system boot can be type M, B and S, but not type N. You can store
them in Flash memory, but only one for each. For example, if an M+B file exists, it is impossible to
have another M or B file. If you change the file type of another file to B, the M+B file becomes a type
M file.
z
You can modify the file name of an application file in CF card using the command after it boots. You
cannot modify the file type of a type S application image file, but you can modify the file type of type
M/B and N application program files in the BootROM menu or using commands after the
application program boots.
z
Secure boot file is the last resort for system boot. You can download it in the BootROM menu and
must name it secure.bin. However, you cannot modify this file or change the type of another file to
S. If you change the name of the secure boot file with the
rename
command after the system boots,
the file is removed from CF card. To use the secure boot file after that, you need to download it
again.
