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Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
OL-11496-01
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-grp through cisco17-grp on the GRP and cisco2-prp through cisco17-prp
on 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)#