Configuring Configuration Rollback; Configuration Task List - H3C S5500-HI Series Fundamentals Configuration Manual

The backup file is named in the _old-filename_bak.cfg format. For example, if the old configuration file
is named config.cfg, the backup file is named _config_bak.cfg.
The overwrite and backup operations are performed on each member device, regardless of whether
configuration auto-update is enabled.
If the backup attempt fails on an IRF member device, choose one of the following failure handling actions
at prompt:
• Give up saving the configuration—The system does not save the running configuration on any
member device.
Overwrite the configuration file—The system uses the running configuration to overwrite the old
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configuration file on the member device without backing up the file. You can copy the backup
configuration file from the master device to this member device for future rollback.
To ensure a successful backup, verify that:
Each device has enough space for the backup configuration file and the new next-startup
•
configuration file.
The file name length of the backup file is no more than 91 characters.
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To load the backup configuration file after a software downgrade, specify the backup file as the
next-startup configuration file on each member device.

Configuring configuration rollback

To replace the running configuration with the configuration in a configuration file without rebooting the
device, use the configuration rollback function. This function helps you revert to a previous configuration
state or adapt the running configuration to different network environments.
The configuration rollback function compares the running configuration against the specified
replacement configuration file and handles configuration differences as follows:
If a command in the running configuration is not in the replacement file, executes its undo form.
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If a command in the replacement file is not in the running configuration, adds it to the running
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configuration.
If a command has different settings in the running configuration and the configuration file, replaces
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its running configuration with the setting in the configuration file.
To facilitate configuration rollback, the configuration archive function is developed. This function enables
the system to automatically save the running configuration at regular intervals as checkpoint references.

Configuration task list

Task
Configuring configuration archive parameters
•
Enabling automatic configuration archiving
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Manually archiving running configuration
Performing configuration rollback
Remarks
Required.
Required.
Use either method.
Required.
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