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Updating the Code of a ipbase Licensed Cisco Catalyst 3750X Switch Stack -
Here in the office the Access Layer of our switching infrastructure is handled completely with a 7 unit stack of Cisco 3750X switches. There is no need for these to do any routing other than intervlan so when purchased 3 years ago we just ordered the IP Base licensing level. Well from what I can tell there is a universal code base and a licensed feature level of each code revision. The universal naming convention looks like c3750e-universalk9-mz.122-55.SE1 while the ipbase looks like c3750e-ipbasek9-mz.150-2.SE6. What I found is that I do not have the ability to download the universal code of later releases due to my licensing level and possibly the lack of SmartNet I keep on these, but I do have access to the ipbase code. When attempting to update the code on this stack I was presented with the error [crayon-5c38be7fa859d805498485/] After some searching I found reference to others trying to go from IP Base to Advanced IP Services code having to put the /allow-feature-upgrade switch on the archive download-sw code in order to allow the upgrade as well as it seems a downgrade. Evidently this feature came about with IOS version 12.2(35). Now the upgrade progressed and I have happy little upgrades switches. [crayon-5c38be7fa85a7083812522/] Another note about this upgrade I found in the official release notes is any upgrade from 15.0(2)SE to later will result in a microcode upgrade which when unmitigated will lead to an exceptionally long restart of the switch. You can mitigate this either by using …