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Chapter 7: Manually Loading System Images
August 1997 Page 7-17
2524UM
Perform the Boot Field Modification Tasks
You modify the boot field from the hardware configuration register or
the software configuration register, depending on the platform.
The hardware configuration register can be changed only on the pro-
cessor card or with dual in-line package (DIP) switches located at the
back of the router. For information on modifying the hardware config-
uration register, refer to the appropriate hardware installation guide.
To modify the software configuration register boot field, complet
these tasks:
1. Obtain the current configuration register setting.
show version
2. Enter configuration mode, selecting the terminal option.
configure terminal
3. Modify the existing configuration register setting to reflect the
way in which you want to load a system image.
config-register
value
4. To exit configuration mode, press <Ctrl-Z>.
5. Reboot the router to make your changes take effect.
reload
Use the
show version
EXEC command to display the current con-
figuration register setting. In ROM monitor mode, use the
o
command
to list the value of the configuration register boot field.
In this example, the
show version
command indicates the current
configuration register is set so the router does not automatically load
an operating system image. Instead, it enters ROM monitor mode and
waits for user-entered ROM monitor commands. The new setting in
structs the router to a load a system image from commands in the star-
tup configuration file or from a default system image stored on a
network server.