4-5
Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Chapter 4 Troubleshooting the Installation
Performing Other Configuration Tasks
If you enter the
boot
command
with
arguments (that is, by instructing the
system to boot from a specific source), you have these options:
–
You can instruct the system to boot from a specific Flash SIMM image
by entering the
boot bootflash:
filename
command, or from a specific
image stored on a PCMCIA Flash memory card by entering the
boot slot #:
imagename
command.
–
You can instruct the system to boot from a network TFTP server either
by sending broadcast TFTP requests by entering a
boot
filename
command, or by sending a direct request to a specific network TFTP
server by issuing a
boot
filename
ip-address
command.
•
When the boot field is set to 1, the system automatically boots using the first
image found in the onboard Flash SIMM on the RP.
•
When the boot field is set to a bit pattern other than 0 or 1, the router uses the
software configuration register settings to compute the filename of a default
system image stored on a network TFTP server. It then uses that system image
to boot the router. But if the configuration file contains boot instructions, the
system uses these instructions to boot the system, rather than using the
filename it computed from the software configuration register settings.
To form this filename, the system starts with
cisco
and links the octal
equivalent of the boot field value and the processor type in this format:
cisco<
bootfieldvalue
>-<
processorname
>
For example, the filename formation process would yield a range of filenames
such as the following:
cisco2-grp
.
.
.
cisco17-grp
or
cisco2-prp
.
.
.
cisco17-prp
The system would use one of the filenames in this range to boot a default system
image stored on a network TFTP server.
