C H A P T E R 4 Troubleshooting The Installation - Cisco 12404 Installation And Configuration Manual

Chapter 4 Troubleshooting the Installation
Table 4-1
Bit Number
00 to 03
06
07
08
09
10
11 and 12
13
14
15
1. The factory default value for the software configuration register is 0x0102. This value is a
2. OEM = original equipment manufacturer.
Table 4-2
booting the default Cisco IOS software image required to run the router. The
content of the boot field is specified as a binary number.
Table 4-2
Boot Field
00
01
OL-11636-01
Software Configuration Register Bit Value and Function
Hexadecimal
1
Value
0x0000 to
0x000F
0x0040
0x0080
0x0100
0x0200
0x0400
0x0800 to
0x1000
0x2000
0x4000
0x8000
combination of binary bit 8 = 0x0100 and binary bits 00 through 03 = 0x0002.
specifies the content of the boot field, which defines a source for
Boot Field and Definitions
Definition
At power-on, the system remains at the ROM monitor prompt
( ), awaiting a user command to boot the system manually.
rommon>
At power-on, the system automatically boots the first system image
found in the onboard Flash memory SIMM on the RP.
Cisco 12404 Internet Router Installation and Configuration Guide
Performing Other Configuration Tasks
Function
Comprises the boot field for defining the source of
a default Cisco IOS software image required to run
the router.
Causes system software to ignore the contents of
NVRAM
2
Enables the OEM bit
Disables the Break function
Uses a secondary bootstrap
Broadcasts Internet Protocol (IP) with all zeros
Defines the console baud rate (the default setting
is 9600 bps)
Boots the default Flash memory software if the
network boot fails
Excludes network numbers from IP broadcasts
Enables diagnostic messages and ignores the
contents of NVRAM
4-3