Can some one explain main difference b/w Cisco IOS Versions 12.0 and 15.0?
12.0 is older and 15.0 is newer. Some new features are introduced in newer releases that are not in older releases. Most features in the older releases will be in the newer releases, though sometimes a feature will be dropped in newer releases because it is no longer useful.
Sent from Cisco Technical Support iPad App
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Cisco's main site has a IOS version feature comparison tool. If you have access to it, you could compare 12.0 vs. 15.0.