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  • 1.  EX4300 Upgrade Path from 14.1X53 to 20.4R3 : Can I Jump ?

    Posted 02-12-2025 05:23

    Hello everyone,

    I am currently running Junos 14.1X53 on my devices and looking to upgrade to Junos 20.4R3. I wanted to confirm whether I can perform this upgrade without needing to intermediate through any other Junos release versions.

    Has anyone here gone through this path or can share any insight or recommendations ?

    Thank you !



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    RAISE RRM
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  • 2.  RE: EX4300 Upgrade Path from 14.1X53 to 20.4R3 : Can I Jump ?

    Posted 02-12-2025 05:49

    I personally would rather suggest to re-install (usb-install) the current recommended Version (don't stop on 20.x). 14.X is extremely old and upgrading in so many steps isn't worth the hassle (trust me we've all been there). Try to upgrade more frequently to avoid this. Most versions that you would need for the intermediate upgrade are no longer accessible through official channels. 



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    Christian Scholz
    Juniper Networks Ambassador | JNCIE-SEC #374
    Mail: chs@ip4.de
    Blog: jncie.eu | Twitter: @chsjuniper | YT-Channel: netchron
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  • 3.  RE: EX4300 Upgrade Path from 14.1X53 to 20.4R3 : Can I Jump ?

    Posted 02-12-2025 23:10

    Hello,

    A direct upgrade is possible on EX4300 from 14.1X53 to 20.4R3 based on the tests performed in Juniper labs with baseline configuration and no line cards.

    It is recommend that the customer tests the upgrade with customer configuration and line cards in their labs before implementing the same in the production.

    Regards,

    Akanksha 



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    Akanksha MathurAkanksha Mathur
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  • 4.  RE: EX4300 Upgrade Path from 14.1X53 to 20.4R3 : Can I Jump ?

    Posted 02-14-2025 04:18

    Hello Raise,

    I have recently upgraded junos from 14 to 21.4R3-S8 directly on EX4300-32F. I did not see any issue.



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    Avinash Kumar
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  • 5.  RE: EX4300 Upgrade Path from 14.1X53 to 20.4R3 : Can I Jump ?

    Posted 02-14-2025 12:15

    While you might not have seen issues (yet) it's not supported to my knowledge to make such huge jumps - the sideeffects can even occur months after the upgrade (been there, done that). Never go against the official upgrade recommendation to avoid outages and errors that seem „unexplainable". The best way would be a fresh install to be on the safe side



    ------------------------------
    Christian Scholz
    Juniper Networks Ambassador | JNCIE-SEC #374
    Mail: chs@ip4.de
    Blog: jncie.eu | Twitter: @chsjuniper | YT-Channel: netchron
    ------------------------------

    Original Message


  • 6.  RE: EX4300 Upgrade Path from 14.1X53 to 20.4R3 : Can I Jump ?

    Posted 02-16-2025 06:33

    Hello Christian,

    Thanks for your sharing your erudite. I open a case with jtac ask to share the old files and to share the exact upgrade path. They suggested me to upgrade directly to 21.4R3-Sx on EX4300

    Pardon me, but now the question arise on how end customer should proceed in future upgrade suggestions.



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    Avinash Kumar
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    Original Message