Cisco 7000 Hardware Installation And Maintenance page 175

If you set the boot field to any bit pattern other than 0 or 1, the system uses the resulting number to
form a file name for netbooting. To form the file name, the system starts with cisco and links the
octal equivalent of the boot field value (jumper setting) and the processor type in the format
cisco<jumpervalue>-<processorname>. (Table 5-1 lists the default boot file names or actions for
the RP.) The system uses the default filename to invoke the system image from ROM or by
netbooting. However, if the configuration file contains any boot instructions, the system uses those
boot instructions instead of the filename it computed from the jumper settings.
The four bits after the boot field (bits 4 through 7) in the configuration register are not used
Note
and must be left cleared (0).
Table 5-1 Default Boot Filenames—Boot Field Jumpers
Action/Filename Bit 3
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 in the configuration register controls the console Break key. Setting bit 8 to 1 (the factory
default) causes the processor to ignore the console Break key. Clearing bit 8 to 0 causes the processor
to interpret Break as a command to force the system into the bootstrap monitor, thereby suspending
normal operation.
Bit 9 in the configuration register is not used.
Bit 2 Bit 1 Bit 0
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 5-171