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.
Liability Disclaimer
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.
Posting
No, unlike the original 3560/3750 series, the "E"s (and "-X"s) require a feature license. You need to have both the correct image and license to upgrade the -S switch. (NB: You can field upgrade the license, assuming it's still available from Cisco.)
BTW, you can still stack the two units, and as long as the -E is running, the stack will have usage of -E features. If that switch member dies, though, the stack, now just the single -S, will revert to -S features.
