Cisco Cisco Gigabit Ethernet Switch Module (CGESM) for HP Technical References

Use the boot config-file global configuration command to specify the filename that Cisco IOS uses to 
read and write a nonvolatile copy of the system configuration. Use the no form of this command to return 
to the default setting.

boot config-file flash:/file-url

The default configuration file is flash:config.text.

Global configuration

Filenames and directory names are case sensitive.

This command changes the setting of the CONFIG_FILE environment variable. For more information, 
see 

flash:/file-url

The path (directory) and name of the configuration file.

12.2(25)SE1

This command was introduced.

Displays the settings of the boot environment variables.