Enabling Booting From Flash Memory - Cisco EF4116 Hardware Installation And Maintenance Manual

Virtual Configuration Register Settings

Enabling Booting from Flash Memory

To enable booting from Flash memory, set bits 3, 2, 1, and 0 to a value between 2 through 15. To
specify a filename to boot, enter the system software configuration command boot system flash
filename in the configuration file.
To enter the configuration mode while in the system software image, enter the configure command
at the enable prompt as in the example following:
To disable break and enable the boot system flash command, enter the config-register command
with a value as follows:
If you set the configuration register value to 0x102, as in the example, it is not necessary to enter the
boot system flash command unless there is more than one image in Flash.
B-6 Cisco 4000 Series Hardware Installation and Maintenance
Gateway# configure
Configuring from terminal, memory, or network [terminal]? term
Enter configuration commands, one per line.
Edit with DELETE, CTRL/W, and CTRL/U; end with CTRL/Z
boot system flash filename
config-reg 0x102
CTRL/Z