Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual page 67

Chapter 3 Configuring the Switch for the First Time
Table 3-2
Bit Number
00 to 03
06
07
08
09
10
11 to 12
13
14
15
1. The factory default value for the configuration register is 0x2102.
2. OEM = original equipment manufacturer.
Table 3-3
Boot Field Meaning
00
01
02 to 0F
Modifying the Boot Field and Using the boot Command
The configuration register boot field determines whether or not the switch loads an operating system
image, and if so, where it obtains this system image. The following sections describe using and setting
the configuration register boot field, and the tasks you must perform to modify the configuration register
boot field.
Bits 0 through 3 of the software configuration register form the boot field.
The factory default configuration register setting for systems and spares is 0x2102.
Note
When the boot field is set to either 0 or 1 (0-0-0-0 or 0-0-0-1), the system ignores any boot instructions
in the system configuration file and the following occurs:
•
•
•
OL-11439-03
Software Configuration Register Bit Meaning
1
Hexadecimal
0x0000 to 0x000F Boot field (see
0x0040
0x0080
0x0100
0x0200
0x0400
0x0800 to 0x1000 Console line speed (default is 9600 baud)
0x2000
0x4000
0x8000
Explanation of Boot Field (Configuration Register Bits 00 to 03)
Stays at the system bootstrap prompt
Boots the first system image in onboard flash memory
Specifies a default filename for booting over the network;
enables boot system commands that override the default filename
When the boot field is set to 0, you must boot the operating system manually by entering the boot
command to the system bootstrap program or ROM monitor.
When the boot field is set to 1, the system boots the first image in the onboard bootflash single
in-line memory module (SIMM).
When the entire boot field equals a value between 0-0-1-0 and 1-1-1-1, the switch loads the system
image specified by boot system commands in the startup configuration file.
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
Modifying the Supervisor Engine Startup Configuration
Meaning
Table 3-3)
Causes system software to ignore NVRAM contents
2
OEM bit enabled
Break disabled
Use secondary bootstrap
Internet Protocol (IP) broadcast with all zeros
Boot default flash software if network boot fails
IP broadcasts do not have network numbers
Enable diagnostic messages and ignore NVRAM contents
3-21