Cisco 3725 Hardware Installation Guide - Page 107
Enabling Booting from CompactFlash Memory
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Appendix C Configuration Register Enabling Booting from CompactFlash Memory Table C-4 System Console Terminal Data Rate Settings Data Rate Bit 5 Bit 12 Bit 11 115200 1 1 1 57600 1 1 0 38400 1 0 1 19200 1 0 0 9600 0 0 0 4800 0 0 1 2400 0 1 1 1200 0 1 0 Enabling Booting from CompactFlash Memory To enable booting from CompactFlash memory, set bits 3, 2, 1, and 0 to a value between 2 to 15. To specify a filename to boot, enter the system software configuration command boot system flash [device:] [partition:] [filename] in the configuration file. By specifying the device and partition in the command, you can configure the router to boot from an external CompactFlash card. If you specify only the filename, the router is configured to boot from internal CompactFlash memory. To enter global configuration mode while in the system software image, enter the configure command at the enable prompt, as in the following example: Router# configure Configuring from terminal, memory, or network [terminal]? terminal Enter configuration commands, one per line. Edit with DELETE, CTRL/W, and CTRL/U; end with CTRL/Z boot system flash filename To disable Break and enable the boot system flash command, enter the config-register command with a value, as follows: Router(config)# config-reg 0x102 Router(config)# Ctrl-z If you set the configuration register value to 0x102, as in this example, you need not enter the boot system flash command unless more than one image is in CompactFlash memory. OL-2180-08 Cisco 3700 Series Routers Hardware Installation Guide C-5