IOS XE 3 vs 16

[DeeDee4evr]

what version should be running and why?

[luis_cordova]

Hi @DeeDee4evr 

You can compare different IOS with this link:

https://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/compareImages.jsp

Regards

[Leo Laohoo]

The latest 16.6.X is recommended.
Use the latest 16.9.X if you are confident about Smart Licensing.

[DeeDee4evr]

So, is 3.x.x being replaced with 16.x.x?

[Leo Laohoo · Accepted solution]

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@DeeDee4evr wrote:

So, is 3.x.x being replaced with 16.x.x?

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Yes.  3.X.X is being replaced by 16.X.X. 

16.X.X will be replaced by 17.X.X (Catalyst 9K only).