Junos OS

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  • 1.  EX3300-24P running 12.3R11.2 - Upgrade options

    Posted 12-07-2025 19:21

    Was looking at the KB article for the upgrade and it wasn't definitive on what steps to take from 12.3R11.2. 

    Want to get the switch to the latest firmware I can, I am assuming I need to do a boot from a USB to do this but the steps weren't clear. Anyone know what the specific steps to take are? If there are firmwares jump between and what the latest release that I can get to is?

    Thanks,



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    CHRIS ZOIS
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  • 2.  RE: EX3300-24P running 12.3R11.2 - Upgrade options

    Posted 12-08-2025 02:22

    The EX3300 is EoL - and while a 15.1 Junos-Tree exists ( along with some issues for 2200/3300/4200) I would recommend to used the latest Version in the Junos-12.3 Tree: 12.3R12-S21

    You can perform a direct update from 12.3R11 to 12.3R12-S21 - no USB needed :)



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    Christian Scholz
    Juniper Networks Ambassador + MistFit | JNCIE-SEC + JNCIE-ENT
    Blog: jncie.eu
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    Original Message


  • 3.  RE: EX3300-24P running 12.3R11.2 - Upgrade options

    Posted 12-08-2025 13:47

    Appreciate the quick response. Thank you!



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    CHRIS ZOIS
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    Original Message