Cisco Systems 12410 Changing Software Configuration Register Settings, Milo# configure terminal

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Chapter 4 System Startup and Basic System Configuration

Configuring the Software Configuration Register

For example, the filename formation process may yield a range of typical filenames like the following:

cisco2-grp

.

.

.

cisco17-grp

The system uses one of the filenames in this range to boot a default system image stored on a network TFTP server.

Note If a bootable Cisco IOS software image exists in a flash memory card inserted in slot 0 or slot 1, the software configuration register boot field setting is overridden. The system boots from the image in the flash memory card, rather than from a network TFTP image (that is, from a computed filename in the range from cisco2-grpthrough cisco17-grpon the GRP and cisco2-prpthrough cisco17-prpon the PRP).

Changing Software Configuration Register Settings

Use the following procedure to change software configuration register settings while running system software.

Step 1 Enter the enable command and password (if prompted).

Milo> enable

Password: <password>

Milo#

Step 2 Enter the configure terminal command to enter global configuration mode.

Milo# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Milo(config)#

 

 

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

 

 

 

 

 

 

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Contents System Startup and Basic System Configuration Sources of Cisco IOS Software Preconfiguration RequirementsBoot Process Overview Powering On the Router and Observing the Boot Process LED Display1 Meaning Source ProcessorPRI LED Display Meaning SourceMII Line Card Alphanumeric LED Displays-Partial View Shown Meaning SourceRomi OL-11496-01 Manually Booting the System Dir slot0 Booting from the Cisco IOS Software ImageDir bootflash Locating a Valid Cisco IOS Software ImageBoot flash Command PurposeConfiguring the Router Cisco IOS User Interface Cisco IOS User Interface Command ModesPrivileged Exec Mode User Exec ModeInterface Configuration Mode Global Configuration ModeSubinterface Configuration Mode Using Setup for Configuration ChangesMay enter a question mark ? for help SDCC1/0 No ip routing Configuring Global Parameters Using the Setup Facility Configuring Host Name Configuring Protocols Configuring Network InterfacesConfiguring Line Card Interfaces Milo# show version Enter the enable command and password if prompted Using Global Configuration ModeRouter# show running-config Verifying Running Configuration File SettingsMilo# configure terminal Milo# copy running-config startup-configSaving the Running Configuration Settings to Nvram Viewing the Running Configuration Settings Configuring the Software Configuration Register Bit Number Hexadecimal Value Meaning/Function Boot Field Setting Software Configuration SettingsCiscobootfieldvalue-processorname Changing Software Configuration Register Settings Miloconfig# config-register 0xvalue Reboot the systemLow-Order Bits in the Software Configuration Register Action/Filename Bit Bit Address net host High-Order Bits in the Software Configuration Register9600 Rommon 1 config-register Recovering a Lost PasswordEnter the initialize command to initialize the router Milo# show startup-config Installing and Removing a Flash Memory Card Using RP Flash Memory CardsOL-11496-01 Installing and Removing a Flash Memory Card Milo# format slot0 Formatting a New Flash Memory CardSpecifying a Cisco IOS Software Image to Boot the System Cd Command Flash Memory CommandsPwd Command Milo# dir slot0 Dir CommandDelete Command Milo# squeeze slot0 Squeeze CommandCopying Image Files to or From Flash Memory Booting from Flash MemoryMiloconfig# boot system flash slot0myfile1 Milo# copy tftpmyfile1 slot0myfile1 Milo# copy tftpfilename bootflashslot0slot1 filenameCopying a Cisco IOS Software Image into a Flash Memory Card Milo# copy tftpnew.image slot0new.image Milo# copy slot1image.new slot0image.new Copying Cisco IOS Software Images Between Flash Memory CardsMilo# configure terminal Copy startup-config slot0 slot1 filename Milo# show bootvarMilo# copy startup-config slot0myfile2 Milo# copy running-config slot0myfile2 Copy running-config slot0slot1filenameMilo# copy startup-config running-config Copy slot0slot1filename startup-configMilo# copy slot0myfile startup-config Recovering from Locked Blocks in Flash Memory Cards Post-Installation Procedures OL-11496-01