Cisco 3000 Series

Virtual
Configuration Register Settings
The server creates
default boot filename
as
part
of the automatic
configuration
processes
To
form
the
boot
filename
the
server starts
with
cisco and links the octal
equivalent
of the boot
field
number
dash
and the
processor-type
name
Table
B-3 lists the default boot filenames or actions
for
the
processor
Note boot
system
configuration
command in the
router
configuration
in NVRAM overrides the
default netboot filename
Table B-3 Default Boot Filenames
Action/File
Name Bit Bit Bit Bit
bootstrap
mode
ROM software
cisco2-igs
cisco3-igs
cisco4-igs
cisco5-igs
cisco6-igs
cisco7-igs
ciscol0-igs
ciscoll-igs
ciscol2-igs
ciscol3-igs
ciscol4-igs
ciscol5-igs
ciscol6-igs
ciscol7-igs
Bit controls the console Break
key
Setting
bit
the factory default causes
the
processor
to
ignore
the console Break
key
Clearing
bit causes the
processor
to
interpret
Break
as
command to force
the
system
into the
bootstrap monitor halting
normal
operation
Break
can
be sent in the first
60 seconds while the
system
reboots regardless
of the
configuration
settings
Bit 10 controls the host
portion
of the Internet broadcast address
Setting
bit 10
causes
the
processor
to
use
all
zeros clearing
bit 10
the
factory
default causes
the
processor
to
use
all
ones
Bit 10
interacts with bit
14
which controls the network and subnet
portions
of the broadcast address
Table B-4 shows the combined effect of bits 10 and 14
B-4 Cisco 3000 Hardware Installation and Maintenance