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Working with Configuration Files
You cannot restore a file after it has been deleted.
Caution
Replacing and Rolling Back Configurations
The configuration replacement and rollback feature replaces the running configuration with any saved
Cisco IOS configuration file. You can use the rollback function to roll back to a previous configuration.
These sections contain this information:
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Understanding Configuration Replacement and Rollback
To use the configuration replacement and rollback feature, you should understand these concepts:
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Archiving a Configuration
The configuration archive provides a mechanism to store, organize, and manage an archive of
configuration files. The configure replace privileged EXEC command increases the configuration
rollback capability. As an alternative, you can save copies of the running configuration by using the copy
running-config destination-url privileged EXEC command, storing the replacement file either locally
or remotely. However, this method lacks any automated file management. The configuration replacement
and rollback feature can automatically save copies of the running configuration to the configuration
archive.
You use the archive config privileged EXEC command to save configurations in the configuration
archive by using a standard location and filename prefix that is automatically appended with an
incremental version number (and optional timestamp) as each consecutive file is saved. You can specify
how many versions of the running configuration are kept in the archive. After the maximum number of
files are saved, the oldest file is automatically deleted when the next, most recent file is saved. The show
archive privileged EXEC command displays information for all the configuration files saved in the
configuration archive.
The Cisco IOS configuration archive, in which the configuration files are stored and available for use
with the configure replace command, is in any of these file systems: FTP, HTTP, RCP, TFTP.
Replacing a Configuration
The configure replace privileged EXEC command replaces the running configuration with any saved
configuration file. When you enter the configure replace command, the running configuration is
compared with the specified replacement configuration, and a set of configuration differences is
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
B-20
Appendix B
Understanding Configuration Replacement and Rollback, page B-20
Configuration Guidelines, page B-21
Configuring the Configuration Archive, page B-22
Performing a Configuration Replacement or Rollback Operation, page B-22
Archiving a Configuration, page B-20
Replacing a Configuration, page B-20
Rolling Back a Configuration, page B-21
Working with the Cisco IOS File System, Configuration Files, and Software Images
OL-8915-03
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