Performing Other Configuration Tasks
Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
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The new Flash memory card is now ready for use.

Specifying a Cisco IOS Image for Booting the System

Use the procedure in this section to identify a particular Cisco IOS software image (named
new.image) that is to be made bootable from a Flash memory card.
The software configuration register must be set to “0x2102” during this procedure in order
for the image to boot from a Flash memory card; accordingly, the config-register command
must be included in the command sequence, as shown below:
Router# config terminal
Router(config)# no boot system
Router(config)# boot system flash slot0:new.image
Router(config)# config-register 0x2102
Ctrl-z
Router# copy running-config startup-config
Router# reload
When you issue the reload command, the specified file (new.image) on the Flash memory
card inserted in PCMCIA slot 0 is used to boot the system.
If one of the following software configuration register settings were to be specified in the
preceding example, the system would behave as described below:
•0x2000—The system would boot a default Cisco IOS software image from a Flash
memory card (if the network boot fails).
•0x0100—The system would ignore the Break function.
•0x0101—The system would boot 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 would look in the Flash memory SIMM on the RP for a default
Cisco IOS software image.
•0x0102—The system would check for a default netboot filename, boot from a Flash
memory card (if the netboot operation fails), and disable the Break function.