Using RP Flash Memory Cards
Specifying a Cisco IOS Software Image to Boot the System
Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
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Use the procedure in this section to identify a specific Cisco IOS software image
(new.image in this example) that you want to make bootable from a flash memory
card.
The software configuration register must be set to 0x2102 to boot the image from
the flash memory card. Therefore, the config-register command must be included
in the command sequence, as shown in the following example.
Milo# configure terminal
Milo(config)# no boot system
Milo(config)# boot system flash slot0:new.image
Milo(config)# config-register 0x2102
Ctrl-Z
Milo# copy running-config startup-config
Milo# reload
When you enter the reload command, the system uses the specified file
(new.image) on the flash memory card in slot 0 to boot the system.
If one of the following software configuration register settings is specified in the
preceding example, the system would follow those instructions accordingly:
0x2000—If the network boot fails, the system boots a default Cisco IOS
•
software image from a flash memory card.
0x0100—The system ignores the Break function.
•
0x0101—The system boots the default image (the first image found) from the
•
onboard flash memory SIMM on the RP. This setting also tells the system that
it should not reset the Break disable function, nor should it check for a default
filename for booting over the network.
0x0002—The system looks in the flash memory SIMM on the RP for a
•
default Cisco IOS software image.
0x0102—The system disables the Break function and checks for a default
•
TFTP server filename. If the network boot operation fails, the system boots
from a flash memory card.
Chapter 4
System Startup and Basic System Configuration
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