I have two new Cisco 3750 switches that I'd like to stack, but they are currently running different IOS versions. One is running 12.2.44 and the other is 12.2.20. With this being said, I'd like to upgrade them to the latest IOS version. Should I do this to each switch before I stack them or can I stack them first and then do it?
Also, since these have never been configured or anything, can I just stack them from the get go or do I need do something first?
Thanks for the help. My Cisco knowledge is above beginner and that is about it.