I hate to necro an old thread, but I am very interested in knowing what your results were. I too, have upgraded my FreeNAS to 11.3 (now 11.3U-1), but still have 11.2-RELEASE-p15 jails. Where, exactly, is the "iocage upgrade -r 11.3-RELEASE [jails name]" command run from, and is that all that is required to avoid having to reconfigure each plugin?