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Chapter 28: Boot Configuration Files
444
Overview
The changes that you make to the parameters settings of the switch are
saved as a series of commands in a special file in the file system. The file
is referred to as the active boot configuration file. This file is updated by
the switch with your latest changes whenever you issue the WRITE
command or the COPY RUNNING-CONFIG STARTUP-CONFIG
command in the Privileged Exec mode.
Once the parameter settings are saved in the active boot configuration file,
they are retained even when the switch is powered off or reset. This saves
you from having to reconfigure the parameter settings every time you
power off or reset the unit. The switch, as part of its initialization process
whenever it is powered on or reset, automatically refers to this file to set its
parameter settings.
You can store more than one boot configuration file in the file system on
the switch, but only one file can be the active file at a time. The active boot
configuration file is specified with the BOOT CONFIG-FILE command, in
the Privileged Exec mode.
There are a couple of situations where you might want to specify a
different active boot configuration file on the switch. You might want to
reconfigure the switch with the settings in a new file that you downloaded
into the file system. Or perhaps you want to restore a previous
configuration on the switch, using a copy of an earlier version of the active
boot configuration file.