As the secure application file is the last resort for system boot, you cannot change its attribute,
or turn another type of application file into a secure application file by means of attribute
modification. You can only download it on the BootWare menu.
Only one file of the same type (M, B, or S) can exist in the CF card. For instance, if an
application file in the CF card has both M and B attributes, no other application file with the
attribute of M or B can exist in the CF card. If the attribute of another application file is changed
from N/A to B, the existing application file that has both M and B attributes will lose its B
attribute.
Configuration Files
The configuration files are used to store the configuration information of the router and load the
configuration information at system boot, The system supports the main and backup attributes
of configuration files, and defines three types of configuration files by default:
Main configuration file (with the attribute of M)
Backup configuration file (with the attribute of B)
Default configuration file (with the attribute of S)
The main and backup configuration files are used as follows:
If the main configuration file is damaged or lost, the backup configuration file is used for loading
the configuration information. This double protection mechanism enhances the reliability of the
file system.
When saving the current configuration, you can specify to save it to the main configuration file,
the backup configuration file, or a configuration file with the attribute denoted by N/A, namely a
configuration file without a specific attribute assigned to it.
When deleting a configuration file, you can specify to delete the main or backup configuration
file. For a configuration file with both M and B attributes, you can specify its M or B attribute to
remove.
You can define a configuration file as the one to be used at the next boot by changing its
attribute to M.
The secure configuration file is used when the system fails to boot using the main, and then the
backup configuration file. Currently the system does not support boot with the secure
configuration file.
The system will select the configuration files in order to load configuration information at startup:
Uses the main configuration file to initialize the configuration if the main file exists.
Uses the backup configuration file to initialize the configuration if the main file does not exist.
Boots using the null configuration (default settings) if the backup file does not exist either.
For more information about configuration files, refer to “
Setting Configuration File Attributes
“ on
page 6-34.
Note that:
You can rename a configuration file at the CLI after the application program is loaded.
You can modify file attributes on the BootWare menu or at the CLI after the application program
is loaded. For detailed information, refer to “
Setting Configuration File Attributes
“ on page 6-34.
A configuration file can have both M and B attributes; but there is only one file of the same
attribute on the router at a time.
Summary of Contents for A6616
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