2-7Do not unplug and plug during configuration rollback (that is, the system is executing the configurationreplace file command). In addition, configuration rollback may fail if one of the following situations ispresent (if a command cannot be rolled back, the system skips it and processes the next one):z The complete undo form of a command is not supported, namely, you cannot get the actual undoform of the command by simply putting the keyword undo in front of the command, so the completeundo form of the command cannot be recognized by the device.z The configuration cannot be removed, such as hardware-related commandsz Commands in different views are dependent on each otherz If the replacement configuration file is not a complete file generated by using the save or archiveconfiguration command, or the file is copied from a different type of device, the configurationcannot be rolled back. Ensure that the replacement configuration file is correct and compatible withthe current device.Specifying a Startup Configuration File for the Next System StartupA startup configuration file is the configuration file to be used at the next system startup. You can specifya configuration file as the startup configuration file to be used at the next system startup in the followingtwo ways:z Use the save command. If you save the current configuration to the specified configuration file inthe interactive mode, the system automatically sets the file as the configuration file to be used atthe next system startup.z Use the command dedicated to specify a startup configuration file, which is described in thefollowing table:Follow the step below to specify a configuration file as the startup configuration file for the next systemstartup:To do… Use the command… RemarksSpecify a startup configurationfile for the next system startupstartup saved-configurationcfgfile [ backup | main ]RequiredAvailable in user viewA configuration file must use .cfg as its extension name and the startup configuration file must be savedunder the root directory of the storage medium.Backing Up the Startup Configuration FileThe backup function allows you to copy the startup configuration file to be used at the next systemstartup from the device to the TFTP server for backup.
