Table of Contents
Advertisement
Reference Information
Changing Settings
To change the configuration register while running the system software, follow these steps:
To enter privileged EXEC configuration mode, use the enable command and your password as shown:
Step 1
Router> enable
Password:
Router#
To enter global configuration mode, use the configure terminal command. You are prompted for further
Step 2
commands, as shown in the following example:
Router# configure terminal
Enter configuration commands, one per line.
Router(config)#
To set the contents of the configuration register, use the config-register 0xvalue configuration command,
Step 3
where value is a hexadecimal number preceded by 0x (see
Router(config)# config-register 0x value
Exit global configuration mode using Ctrl-Z or by typing end.The new configuration register settings
Step 4
are saved to memory; however, the new settings do not take effect until the system software is reloaded
when you reboot the router.
Step 5
To display the configuration register value currently in effect and the value that will be used at the next
reload, enter the show version privileged EXEC command. The value is displayed on the last line of the
screen display, as in the following example:
Configuration register is 0x141 (will be 0x101 at next reload)
Reboot the router. The new value takes effect. Configuration register changes take effect only when the
Step 6
system reloads, such as when you issue a reload command from the console.
This completes the procedure to change the configuration register while running the system software.
Bit Meanings
The lowest four bits of the software configuration register (bits 3, 2, 1, and 0) form the boot field. (See
Table
boot the operating system manually by entering the b command at the bootstrap prompt (>), as follows:
> b [tftp] flash filename
Definitions of the various b command options follow:
•
•
•
•
•
•
Route Switch Processor (RSP8) Installation and Configuration Guide
84
10.) The boot field specifies a number in binary form. If you set the boot field value to 0, you must
b—Boots the default system software from Flash memory
b flash—Boots the first file in onboard Flash memory
b slot0: filename—Boots the file filename from the Flash Disk in PC Card slot 0
b slot1: filename—Boots the file filename from the Flash Disk in PC Card slot 1
b filename [host]—Boots from server host using TFTP
b bootflash: [filename]—Boots the file filename from onboard Flash memory
End with CNTL/Z.
Table
10), as shown in the following example:
OL-4920-02
Advertisement
Table of Contents
