I have done production upgrades since for eva ago.
I never had an issue in upgrades except on x86 machines where the drivers were updated an no longer supported older hardware like sfp modules.  Too easy roll back a few and order new sfps' and viola easy upgrade to 6.46.6

If your concerned about a router fail have one already updated with new ROS and config on standby.

my 2 cents



On 08/20/2018 02:28 PM, Josh Luthman via Mikrotik-users wrote:
What differences exactly?  What's the diff say?

What does an upgrade have to do with this?  Why can't you just upgrade?


Josh Luthman
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On Mon, Aug 20, 2018 at 3:09 PM, Sam Morris via Mikrotik-users <mikrotik-users@wispa.org <mailto:mikrotik-users@wispa.org>> wrote:

    We have a number of devices to upgrade from 6.35 to 6.42. In
    testing the
    upgrade in a lab, I'm finding many discrepancies in the "export"
    output.

    The steps I took were:

    (On the production router)  export file=prod-config

    - set up an identical spare router on the same RoS as the prod
    router,
    reset its configuration, and copy/paste the output of the export
    command
    from the prod router into the spare router

    - upgrade the spare router to 6.42.6

    - export the upgraded router config (export file=upgraded-spare)

    After this, I compare the differences between the files exported
    on the
    original production router (still running 6.35.x) and the upgraded
    spare
    router (now running 6.42.6). When doing so, I see many
    differences, and
    am concerned that when we upgrade the production routers that they
    will
    no longer work.

    Is there anything that may help with this? Tools, documentation,
    etc? Or
    with RoS automatically do the conversion of commands from the earlier
    versions to the newest version?

    Thanks
    Sam
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