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help on how to upgrade cisco 1801 ios v12.4 to 15.1

malai.joseph
Beginner
Beginner

hello

Kindly help on how to upgrde cisco 1801 ios version  12.4 to 15.1 step by step

thx

joseph

1 Accepted Solution

Accepted Solutions

mfurnival
Enthusiast
Enthusiast

Hi,

IOS install procedure is covered here:

http://www.cisco.com/c/en/us/support/docs/routers/3800-series-integrated-services-routers/49044-sw-upgrade-proc-ram.html

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.

View solution in original post

2 Replies 2

mfurnival
Enthusiast
Enthusiast

Hi,

IOS install procedure is covered here:

http://www.cisco.com/c/en/us/support/docs/routers/3800-series-integrated-services-routers/49044-sw-upgrade-proc-ram.html

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.

Hello mfurnival,

Thanks for quick respond

How to take backup of  IOS image from v15.1 cisco and overwrite to 12.4 v

Joseph

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