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Route Switch Processor (RSP8) Installation and Configuration Guide
OL-4920-02
Reference Information
•To recover a lost password
•To allow you to manually boot the system using thebcommand at the bootstrap program prompt
•Toforce the router to boot automatically from the system bootstrap software (boot image) or from
itsdefault system image in onboard Flash memory, and to read any boot system commands that are
stored in the configuration file in NVRAM
Ifthe router finds no boot system commands, it uses the configuration register value to form a filename
from which to boot a default system image stored on a network server. (SeeTable 11.)
Table9 lists the meaning of each of the software configuration memory bits, and Table10 defines the
boot field.
Caution To avoid confusion and possibly halting the router, remember that valid configuration register settings
mightbe combinations of settings and not just the individual settings listed in Table 9. For example, the
factory default value of 0x0102 is a combination of settings.
Table9 Software Configuration Register Bit Meanings
Bit Number1
1. The factory default value for the configuration register is 0x0102. This value is a combination of the following: bit8 =
0x0100 and bits 00 through 03 = 0x0001 (seeTable 11).
Hexadecimal Meaning
00 to 0F 0x0000 to 0x000F Boot field (seeTable 10)
06 0x0040 Causes system software to ignore NVRAM contents
07 0x0080 OEM2 bit enabled
2. OEM = original equipment manufacturer
08 0x0100 Break disabled
09 0x0200 Use secondary bootstrap
10 0x0400 IP broadcast with all zeros
11 to 12 0x0800 to 0x1000 Console line speed (default is 9600 baud)
13 0x2000 Boot default Flash memory software if network boot fails
14 0x4000 IP broadcasts do not have network numbers
15 0x8000 Enable diagnostic messages and ignore NVRAM contents
Table10 Explanation of Boot Field (Software Configuration Register Bits 00 to 0F)
Boot Field Meaning
00 Stays at the system bootstrap prompt
01 Boots the first system image in onboard Flash memory
02 to 0F Specifies a default network boot filename
Enables boot system commands that override the default network boot filename