H3C MSR 30-20 ROUTER

5-2
z The application programs for system boot can be type M, B and S, but not type N.
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.
z 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 impossible to have a type M or type B file. If
you change the file type of another file to B, the M+B file becomes a type M file.
Configuration file
The file stores configuration information of the router.
By default, the system defines and attempts to boot in order with three configuration files: main, backup,
and default, 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 describes the three configuration files.
Table 5-2 Description on the three configuration files
Configuration file File type Description
Main configuration file M Used by the system for booting by default.
Backup configuration file B
Used by the system for booting when it fails to boot
with the main configuration file.
Default configuration file M/B/N
Used by the system for booting when it fails to boot
with the backup configuration file. If the system fails
to boot with the default configuration file, it boots
with null configuration. The name of the default
configuration file has something to do with the
router brand. The main and backup configuration
operations on the default configuration file is the
same with common configuration files.