H3C MSR 20-20, User Manual

Page: 37 / 60

5
S
OFTWARE
M
AINTENANCE
n
This manual uses H3C MSR 50 series routers as an example.
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 55.
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 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.
■
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.
Table 14 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