Cisco Systems 12010, 12810, 12410 manual Specifying a Cisco IOS Software Image to Boot the System

Chapter 4 System Startup and Basic System Configuration

Using RP Flash Memory Cards

Specifying a Cisco IOS Software Image to Boot the System

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-registercommand 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.

	Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
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