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router ios upgrade 2811

I am trying to upgrade the router from compact  Flash Card I have put the file on the new card and reboot the router. what about the config that is running on the router and the boot parameters does it automatically load the old config?

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The 2811 will load its config from NVRAM, and by default, will boot its IOS from CF.  Also by default, it will use the first valid IOS image it finds, but it can be configured to look for specific IOS images.  If it doesn't find any of the specific IOS images, it will again select the first valid IOS image on CF.

The later 2811 ROM images can also boot from USB, but this would need to be defined in the config.


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