Cisco Systems Cisco 12008 manual Enabling Booting from Flash Memory

Performing Other Configuration Tasks

Note During the squeeze operation, the system maintains a log identifying which of the squeeze functions has been accomplished so that the system can return to the proper place and continue the operation in the event of a power failure.

The character “Z” indicates that the log has been erased following the successful squeeze operation.

Enabling Booting from Flash Memory

To enable booting from Flash memory, set the boot field in the software configuration register (bits 3 through 0) to a value between 2 and 15. These values are used with the boot system flash device:filename command, where device can be slot0:, slot1:, or bootflash:, and filename is the name of the file you want the system to boot.

For more detailed information about setting values in the software configuration register, refer to the earlier section entitled “Configuring the Software Configuration Register.”

To enter the global configuration mode (while the system is running) and specify a Flash filename from which to boot the system, enter the configure terminal command at the privileged EXEC mode prompt:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# boot system flash device:filename

To disable the Break function and enable the boot system flash device:filename command, issue the config-registercommand at the global configuration mode with the configuration register value shown below:

Router(config)# config-reg 0x0102

Ctrl-z

Router#

Observing System Startup and Performing a Basic Configuration 4-53