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When you use the save safely command to save the configuration file, if the switch reboots or the
power fails during the saving process, the switch initializes itself in the following two conditions when it
starts up next time:
z If a configuration file with the extension .cfg exists in the Flash, the switch uses the configuration
file to initialize itself when it starts up next time.
z If there is no .cfg configuration file in the Flash, but there is a configuration file with the
extension .cfgbak (backup configuration file containing the original configuration information)
or/and a configuration file with the extension .cfgtmp (temporary configuration file containing the
current configuration information) in the Flash, you can change the extension .cfgbak or .cfgtmp
to .cfg using the rename command. The switch will use the renamed configuration file to initialize
itself when it starts up next time.
For details of the rename command, refer to the File System Management part of the manual.
Three attributes of the configuration file
z Main attribute. When you use the save [ [ safely ] [ main ] ] command to save the current
configuration, the configuration file you get has main attribute. If this configuration file already
exists and has backup attribute, the file will have both main and backup attributes after execution of
this command. If the filename you entered is different from that existing in the system, this
command will erase its main attribute to allow only one main attribute configuration file in the
switch.
z Backup attribute. When you use the save [ safely ] backup command to save the current
configuration, the configuration file you get has backup attribute. If this configuration file already
exists and has main attribute, the file will have both main and backup attributes after execution of
this command. If the filename you entered is different from that existing in the system, this
command will erase its backup attribute to allow only one backup attribute configuration file in the
switch.
z Normal attribute. When you use the save cfgfile command to save the current configuration, the
configuration file you get has normal attribute if it is not an existing file. Otherwise, the attribute is
dependent on the original attribute of the file.
z It is recommended to adopt the fast saving mode in the conditions of stable power and adopt the
safe mode in the conditions of unstable power or remote maintenance.
z If you use the save command after a fabric is formed on the switch, the units in the fabric save their
own startup configuration files automatically.
z The extension name of the configuration file must be .cfg.
Erasing the Startup Configuration File
You can clear the configuration files saved on the switch through commands.
Use the following command to erase the configuration file: