Bits In The Software Configuration Register - Cisco PRP-1= Installation And Configuration Manual

Bits in the Software Configuration Register

OL-11656-01
As described in the "Boot Field Settings" section on page
determines the source of the Cisco IOS software image that is used to boot the
router. A detailed description of the bit values for the boot field and their
associated action or filename is given in
Table 10 Default Boot Filenames
Action/Filename
Bootstrap mode
Default software
cisco2-grp or cisco2-prp
cisco3-grp or cisco3-prp
cisco4-grp or cisco4-prp
cisco5-grp or cisco5-prp
cisco6-grp or cisco6-prp
cisco7-grp or cisco7-prp
cisco10-grp or cisco10-prp
cisco11-grp or cisco11-prp
cisco12-grp or cisco12-prp
cisco13-grp or cisco13-prp
cisco14-grp or cisco14-prp
cisco15-grp or cisco15-prp
cisco16-grp or cisco16-prp
cisco17-grp or cisco17-prp
The remaining bits in the software configuration register are described following:
Bit 8 of the software configuration register controls the console Break key. Setting
bit 8 causes the system to ignore the console Break key. This is the factory default.
Conversely, clearing bit 8 causes the system to interpret a Break keystroke as a
command to halt normal system operation and force the system into ROM monitor
Performance Route Processor Installation and Configuration Guide
Additional Configuration and Maintenance Tasks
Table 10
Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
57, the boot field setting
59