What is the difference between 0x2101 and 0x2102 configuration register?

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Hi, I was studying about routers and registers used in them. I learnt about 0x2102 and 0x2101 configuration registers. Please tell me the difference between them.

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Answered By 0 points N/A #339819

What is the difference between 0x2101 and 0x2102 configuration register?

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We use 0x2101 when there is one IOS version in a flash, whereas when there is more than one IOS version in a flash, we use 0x2102.

When 0x2101 boots, it boots into bootstrap first, whereas 0x2102 boots a system image from EPROM.

Here is the snapshot from the cisco website –

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