These 2 3750X switches will have 2 3750g-12s-s switches connected in a stackwise loop at some point. Problem i see is the latest version available for download for the G switches is 12.2-55 SE10. Will running a mixed versions work in the full 4 switch stack or do i need to downgrade the 3750X switches to an earlier version?
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I would recommend you downgrade, although I also recommend avoiding mixing StackWise and StackWisePlus switches.