Kindly help on how to upgrde cisco 1801 ios version 12.4 to 15.1 step by step
Go to Solution.
IOS install procedure is covered here:
Some things to watch out for:
- make sure you have enough space on your flash for both old and new IOS then you can roll back if need be
- 15 IOS functionality is controlled by licensing whereas 12.4 is not so be aware that you may have to pay for certain features.
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Thanks for quick respond
How to take backup of IOS image from v15.1 cisco and overwrite to 12.4 v
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