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is undo A C, the configuration rollback function cannot undo the A B C command, because the
system does not recognize the undo A B C command.
• A command (for example, a hardware-dependent command) cannot be deleted, overwritten, or
undone due to system restrictions.
• The commands in different views are dependent on each other.
• Commands or command settings that the device does not support cannot be added to the running
configuration.
Specifying a next-startup configuration file
CAUTION:
In an IRF fabric, use the undo startup saved-configuration command with caution. This command can
cause an IRF split after the IRF fabric or an IRF member reboots.
You can specify a .cfg configuration file as a main or backup next-startup configuration file when using
the save [ safely ] [ backup | main ] [ force ] command to save the running configuration.
Alternatively, you can execute the startup saved-configuration cfgfile [ backup | main ] command to
specify a configuration file as the main or backup next-startup configuration file. When performing this
task, follow these guidelines:
• Configuration files stored in a USB disk cannot be specified as the next-startup configuration file.
• Make sure the specified configuration file is valid and saved to the root directory of each member
device's flash memory.
• If neither backup nor main is specified, this command sets the configuration file as the main
next-startup configuration file.
• Even though the main and backup next-startup configuration files can be the same one, specify
them as separate files for high availability.
• The undo startup saved-configuration command changes the attribute of the main or backup
next-startup configuration file to NULL instead of deleting the file.
To specify a next-startup configuration file, perform the following task in user view:
Task Command Remarks
Specify the next-startup
configuration file.
startup saved-configuration cfgfile
[ backup | main ]
Use the display startup command
and the display
saved-configuration command in
any view to verify the
configuration.
Backing up the main next-startup configuration file
to a TFTP server
Before performing this task, make sure the following requirements are met:
• The server is reachable.
• The server is enabled with TFTP service.