Cisco 7000 Hardware Installation And Maintenance page 181

In the following example, the software configuration register is set to boot the router from Flash
memory and to ignore Break at the next reboot of the router:
Router# conf term
Enter configuration commands, one per line. End with CTRL/Z.
config-register 0x102
boot system flash [filename]
^z
Router#
The server creates a default boot filename as part of the automatic configuration processes. To form
the boot filename, the server starts with the name cisco and adds the octal equivalent of the boot field
number, a hyphen, and the processor-type name. Table 5-6 lists the default boot filenames or actions
for the processor.
Note A boot system configuration command in the router configuration in NVRAM overrides the
default netboot filename.
Table 5-6 Default Boot Filenames
Action/File Name Bit 3 Bit 2 Bit 1 Bit 0
Bootstrap mode 0
ROM software 0
cisco2-rp1 0
cisco3-rp1 0
cisco4-rp1 0
cisco5-rp1 0
cisco6-rp1 0
cisco7-rp1 0
cisco10-rp1 1
cisco11-rp1 1
cisco12-rp1 1
cisco13-rp1 1
cisco14-rp1 1
cisco15-rp1 1
cisco16-rp1 1
cisco17-rp1 1
Bit 8 controls the console Break key. Setting bit 8 (the factory default) causes the processor to ignore
the console Break key. Clearing bit 8 causes the processor to interpret the Break key as a command
to force the system into the bootstrap monitor, thereby halting normal operation. A break can be sent
in the first 60 seconds while the system reboots, regardless of the configuration settings.
Bit 9 controls the secondary bootstrap program function. Setting bit 9 causes the system to use the
secondary bootstrap; clearing bit 9 causes the system to ignore the secondary bootstrap. The
secondary bootstrap program is used for system debugging and diagnostics.
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Installing and Configuring Processor Modules
Maintenance 5-177