Configuration Replace and Rollback | 30112“Configuration Replace and RollbackConfiguration Replace and Rollback is supported on platforms c eThe E-Series ExaScale platform is supported with FTOS 8.1.1.0 and later.Configuration Replace and Rollback enables you to replace the current running-configuration withdifferent configuration without restarting the chassis.Without this feature, if you want to load a new running configuration, you must copy the desiredconfiguration file to the startup-configuration (using the command copy file startup-configuration) andreboot the chassis (using the command reload). Copying the desired configuration file to therunning-configuration file (using the command copy file running-configuration) merely appends the runningconfiguration; any conflicts between the two files is reported to the console, but FTOS does not overwritethe running configuration, therefore the new configuration is not fully implemented.The reboot process takes several minutes by default, and if your startup-configuration is extensive, theprocess can take several minutes more. As a result, when the Dell Force10 system is deployed inproduction environment, you must wait for a maintenance window to load a new configuration.The Configuration Replace and Rollback feature allows you to archive your running configuration, and ata later time, replace your running configuration with the archived one without rebooting the chassis.During replacement FTOS calculates and applies only the difference between the archived file and therunning-configuration, making the process faster. Once the archived configuration is loaded, you canconfirm the replacement, or revert (roll back) to your previous configuration. Rolling back allows you toview and test a configuration before completing the change.Archived FilesArchived files are stored on the internal flash in a hidden directory. The maximum number of archived filesis configurable between 10 and 15. If you archive more than the configured maximum, the oldest archivedfile is deleted to create space. You can view the name, size, and date of creation of a file, but you cannotview the contents of the archived file directly (using the command show file). To view the contents of a fileyou can backup the archive file to another location and then use the command show file, or view the thedifferences between the archived file and another file using the show diff command.
