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Performance Route Processor Installation and Configuration Guide
OL-11656-01
Note Cisco 12000 Series Internet Routers are typically delivered from the factory with
a mini-Cisco IOS software boot image in the boot flash and a flash card containing
a suitable working Cisco IOS image. If you need a Cisco IOS upgrade, download
the appropriate Cisco IOS image from Cisco.com.
Configuring the Software Configuration Register
To configure the software configuration register, follow these steps:
Command Purpose
Step 1
Router> enable
Password: <password>
Enters privileged EXEC mode.
Step 2
Router# configure terminal
Enters global configuration mode.
Step 3
Router(config)#
config-register 0xvalue
Sets the contents of the software configuration register,
where
value is a 4-bit hexadecimal number as described
in Table 8.
Step 4
Router(config)# ctrl-Z
Exits global configuration mode.
Step 5
Router# show version
Displays the software configuration register value
currently in effect. This is the value that will be used
the next time the router reloads. The value is displayed
on the last line of the display, as in the following
example:
Configuration register is 0x141 (will be 0x102 at
next reload)
Step 6
Router# copy running-config
startup-config
or
Router# write memory
Saves the software configuration register settings to
NVRAM.
Step 7
Router# reload
Reboots the router. Configuration register changes take
effect only after the system reloads.