Term
| What is the Configuration Register? |
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Definition
| The Configuration Register is a special 16-bit Hexidecimal number that can be set on any Cisco router. |
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Term
| What does the Configuration Register do? |
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Definition
| The Configuration Register controls different settings for some low-level operating characteristics of a router. |
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Term
| What is the global configuration command for the registry? |
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Definition
| config-register 0x210x (the last "x" in the Hex string is the variable) |
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Term
| What value of the registry is used by a router when choosing which OS to load? |
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Definition
| A router chooses the OS to load based on the low-order 4 bits in the register. |
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Term
| What is the low-order 4 bits (4th Hex digit)in the register called? |
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Definition
| The 4th Hex digit in the register is called the "Boot Field". |
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Term
| What are the three common values for the 4th Hex digit in the register? |
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Definition
| The 4th Hex digit is typically set to "0, 1 or 2". |
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Term
| If the Boot Field (4th Hex digit) in the register is set to "0", what happens? |
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Definition
| This causes the router to load the "ROMMOM OS" instead of IOS. |
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Term
| If the Boot Field (4th Hex digit) in the register is set to "1", what happens? |
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Definition
| This causes the router to load the 1st IOS file found in Flash memory. |
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Term
| If the Boot Field (4th Hex digit) in the register is set to "2", what happen? |
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Definition
| This causes the router to: 1)Try each "Boot System" command in the startup-config file until one works. 2)If none of the "Boot System" commands works, load the 1st IOS file found in Flash memory |
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