H3C Technologies H3C S5120 Series Switches - Manual (Page 612)

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z Safe mode. This is the mode when you use the save command with the safely keyword. The mode
saves the file more slowly but can retain the configuration file in the device even if the device
reboots or the power fails during the process.
The fast saving mode is suitable for environments where power supply is stable. The safe mode,
however, is preferred in environments where stable power supply is unavailable or remote maintenance
is involved.
Follow the steps below to save the current configuration:
To do… Use the command… Remarks
Save the current configuration
to the specified file, but the
configuration file will not be set
as the file for the next startup
save file-url
Save the current configuration
to the root directory of the
storage medium and specify
the file as the startup
configuration file that will be
used at the next system startup
save [ safely ] [ backup |
main ]
Required
Use either command
Available in any view.
z The configuration file must be with extension .cfg.
z For the device that supports the main keyword, the execution of the save [ safely ] and save
[ safely ] main commands has the same effect: The system will save the current configuration and
specify the configuration file as the main startup configuration file to be used at the next system
startup.
z During the execution of the save [ backup | main ] command, the startup configuration file to be
used at the next system startup may be lost if the device reboots or the power supply fails. In this
case, the device will boot with the null configuration, and after the device reboots, you need to
re-specify a startup configuration file for the next system startup (refer to Specifying a Startup
Configuration File for the Next System Startup ).
Setting Configuration Rollback
Introduction
Configuration rollback allows you to revert to a previous configuration state based on a specified
configuration file. The specified configuration file must be a valid .cfg file, namely, it can be generated
by using either the backup function (manually or automatically) or the save command, and even the
compatible configuration file of another device. You are recommended to use the configuration file that
is generated by using the backup function (manually or automatically). Configuration rollback is applied
in the following situations:
z The current configurations are wrong; and there are too many wrong configurations to locate or to
correct one by one. Rolling back the current configuration to a correct one is needed.