User Guide

Chapter 2 Basic MSFC Software Configuration
Performing Other Configuration Tasks
2-24
Cisco 7600 Optical Services Router Quick Software Configuration Guide
78-12799-01
To create this filename, the system starts with the name cisco and links the octal
equivalent of the boot field value and the processor type in this format:
cisco<bootfieldvalue>-<processorname>
If the configuration file contains boot instructions, the system uses these
instructions to boot the system instead of using the filename it created from the
software configuration register settings.
Note If a bootable Cisco IOS software image exists in a Flash memory card inserted
in PCMCIA slot 0 or slot 1, the software configuration register boot field
setting is overridden and the system boots from the Cisco IOS software image
in the Flash memory card, instead of from a network TFTP image.
Changing the Software Configuration Register Settings
To change the software configuration register settings while running system
software, perform these steps:
Step 1 Enter the enable command and your password at the user EXEC mode prompt to
establish the privileged EXEC mode:
Router> enable
Password:
Router#
Step 2 Enter the configure terminal command at the privileged EXEC mode prompt to
establish the global configuration mode:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 3 Set the contents of the software configuration register by entering the
config-register value command at the global configuration mode prompt, where
value is a hexadecimal number preceded by 0x.
The config-register value command takes this form:
Router(config)# config-register 0xvalue