Implementing Additional Configuration and Maintenance Tasks
Table 9 | Software Configuration Register Bit Descriptions | ||
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Bit 1 |
| Hexadecimal | Description |
00 to 03 |
| 0x0000 to 0x000F | Boot field (see Table 10) |
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06 |
| 0x0040 | System software ignores NVRAM contents |
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07 |
| 0x0080 | OEM2 bit enabled |
08 |
| 0x0100 | Break disabled |
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09 |
| 0x0200 | Use secondary bootstrap |
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10 |
| 0x0400 | IP3 broadcast with all zeros |
11 to 12 |
| 0x0800 to 0x1000 | Console line speed (default is 9600 baud) |
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13 |
| 0x2000 | Boot default Flash software if network boot fails |
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14 |
| 0x4000 | IP broadcasts without network numbers |
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15 |
| 0x8000 | Enable diagnostic messages and ignore NVRAM contents |
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1.The factory default value for the configuration register is 0x2102. This value is a combination of the following: binary bit 8 = 0x0100 and binary bits 00 through 03 = 0x0002 (see Table 10).
2.OEM = original equipment manufacturer
3.IP = Internet Protocol
Table 10 Boot Field Descriptions (Configuration Register Bits 00 to 03)
Boot Field | Description |
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00 | Stays at the system bootstrap prompt. |
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01 | Boots the first system image in onboard Flash memory. |
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02 to 0F | Specifies a default filename for booting over the network. |
| Enables boot system commands that override the default filename. |
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Boot Field Settings and the boot Command
Bits 0 through 3 of the software configuration register form the boot field, specified as a binary number.
Note The factory default configuration register setting for systems and GRP spares is 0x2102.
Boot
•When the boot field is set to 0, you must boot the operating system manually by using the boot command to the system bootstrap program, or rom monitor.
or
•When the boot field is set to 1, the system boots the first image in the onboard bootflash single
Configuring the Software Configuration Register
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