5
S
OFTWARE
M
AINTENANCE
n
The storage medium can be a compact Flash (CF) card or a Flash card. In this
chapter, only CF cards are involved.
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 “Maintaining Application Program and Configuration File” on page 74.
The following table gives default names and types of boot files.
n
■
The application programs for system boot can be type M, B and S, but not type
N.
■
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.
■
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.
■
You can store all these types of application programs in a CF card, but only one
for each due to the limited space. For example, if an M+B file exists, it is
Table 24
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
