Cisco 10008 User Manual
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17
Cisco 10008 Router Performance Routing Engine 3 Installation
OL-8544-01
Managing System Boot Parameters
Changing the Software Configuration Register Settings
The factory default value for the software configuration register is 0x2102. This value is a combination
of the following: binary bit 8 = 0x0100, bits 00 through 03 = 0x0002, and bit 13 = 2000.
To change the software configuration register settings while you are running system software, perform
the following steps:
Step 1
From global configuration mode, enter the config-register value command to set the contents of the
software configuration-register; value is a hexadecimal number preceded by 0x, for example:
Router(config)# config-register 0x2100
Consult the hexadecimal column in
for the possible settings to enter as the 4-bit value
parameter.
Step 2
Exit global configuration mode by pressing Ctrl-Z.
Router(config)# Ctrl-Z
Router#
Step 3
To display the new software configuration register setting, issue the show version command.
Router# show version
.
.
.
#Configuration register is 0x141 (will be 0x2100 at next reload)
Step 4
Save the configuration file to preserve the new software configuration register settings.
Router# copy running-config startup-config
Step 5
Reboot the router.
The router reboots using the new register settings. The software configuration register setting takes
affect only after you reload the system. This happens when you issue the reload command from the
console or reboot the router.