Datasheet

60
OL-17436-01
Additional Configuration and Maintenance Tasks
The RP ROM monitor is loaded into the RP Flash ROM when the RP is manufactured. You can use
it to boot the system from local Flash memory devices. The RP ROM monitor software can be
upgraded in the field, if necessary.
Note All PRP-2 cards shipped prior to the release of Cisco IOS release 12.0(30)S are provided with a
ROM monitor version installed at the factory. This ROM monitor version cannot be changed
while using IOS images older than 12.0(30)S. When using software release 12.0(30)S or later,
the ROM monitor software can be updated normally.
If you attempt to upgrade the ROM monitor software while running a release prior to 12.0(30)S,
you will receive the following error message:
Unknown device (mfg id 0x01, dev id 0xA3
Error: Unknown Flash Device type!
GRP ROM monitor upgrade won't continue
If you are running a PRP-2 on a software release prior to 12.0(30)S and you receive an error
message that you must upgrade the ROM monitor software, ignore this error message.
• Read boot system commands from the configuration file stored in NVRAM.
Table 18 defines the bits in the software configuration register.
Note Valid software configuration register values may be combinations of settings, rather than the individual
settings listed in Table 18. For example, the factory default value 0x0102 for the software configuration
register is a composite of several settings.
Table 18 Software Configuration Register Bit Meanings
Bit Number
1
1. The factory default value for the software configuration register is 0x0102. This value is a combination of binary bit 8 =
0x0100 and binary bits 00 through 03 = 0x0002.
Hexadecimal Value Meaning/Function
00 to 03 0x0000 to 0x000F Comprises the boot field for defining the source of a default
Cisco IOS software image required to run the router
(see Table 19)
06 0x0040 Causes system software to ignore the contents of NVRAM
07 0x0080 Enables the OEM
2
bit
2. OEM = original equipment manufacturer.
08 0x0100 Disables the Break function
09 0x0200 Uses a secondary bootstrap
10 0x0400 Broadcasts Internet Protocol (IP) with all zeros
11 and 12 0x0800 to 0x1000 Defines the console baud rate (the default setting is 9600 bps)
13 0x2000 Boots the default Flash memory software if the network boot
fails
14 0x4000 Excludes network numbers from IP broadcasts
15 0x8000 Enables diagnostic messages and ignores the contents of
NVRAM