Additional Configuration and Maintenance Tasks
Bits in the Software Configuration Register
As described in the “Boot Field Settings” section on page 57, the boot field setting 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
Table 10 | Default Boot Filenames |
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Action/Filename | Bit 3 | Bit 2 | Bit 1 | Bit 0 | |
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Bootstrap mode |
| 0 | 0 | 0 | 0 |
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Default software | 0 | 0 | 0 | 1 | |
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0 | 0 | 1 | 0 | ||
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0 | 0 | 1 | 1 | ||
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0 | 1 | 0 | 0 | ||
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0 | 1 | 0 | 1 | ||
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0 | 1 | 1 | 0 | ||
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0 | 1 | 1 | 1 | ||
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1 | 0 | 0 | 0 | ||
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1 | 0 | 0 | 1 | ||
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1 | 0 | 1 | 0 | ||
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1 | 0 | 1 | 1 | ||
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1 | 1 | 0 | 0 | ||
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1 | 1 | 0 | 1 | ||
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1 | 1 | 1 | 0 | ||
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1 | 1 | 1 | 1 | ||
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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
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| Performance Route Processor Installation and Configuration Guide |
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| 59 | |
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