Junos OS

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  • 1.  MX upgrade from 19.4 to 23.4

    Posted 12-08-2025 02:22

    Hi 

    I'm about to upgrade Mx240 running Junos 19.4R3-S7.3  to 23.4R2-S5, I'm  just wondering if anyone has made such big jump, I'm looking to upgrade in one jump using the command"- request vmhost software add /var/tmp/junos-vmhost-install-mx-xxxxxxxxxxxx.tgz".

    If anyone has such experiance please let me know and what is the optimal way to upgrade in this case?

    Thanks

    Majd



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    MAJD GHIBEH
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  • 2.  RE: MX upgrade from 19.4 to 23.4

    Posted 12-09-2025 02:41

    It's a huge step, but could be doable, not sure. This is one thing you need to be aware of:

    https://supportportal.juniper.net/s/article/VMHOST-platforms-are-required-to-upgrade-the-Intel-i40e-NVM-firmware-for-installing-WRL9-based-JUNOS-vmhost-image

    "

    user@mx> show system firmware

Part             Type             Tag          Current     Available         Status
                                               version     version
Routing Engine 0  RE BIOS       0                0.53.1                           OK
Routing Engine 1 RE BIOS        0                0.43                             OK
Routing Engine 1 RE FPGA        1                28.0.0                           OK
Routing Engine 1 RE SSD1        3                0.0.0                            OK
Routing Engine 1 RE SSD2        3                0.0.0                            OK
    Routing Engine 1 RE i40e-NVM    7                4.26         6.01                OK

    If the line with "i40e-NVM" is there and says anything less than 6.01 in the "Current version" column, you MUST upgrade that firmware before attempting the Junos upgrade.

    /Fredrik

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    Original Message


  • 3.  RE: MX upgrade from 19.4 to 23.4

    Posted 12-10-2025 06:55

    Remark about i40e-NVM is important, of course.

    But, two remarks:

    • Probably don't try to go from 19.4 to 23.4 directly. Normally you're expected to do 19.4->20.4->21.4->22.4->23.4
    • What is the content of the MX chassis (RE, SCB and MPC) ? As some older components are only supported up to 21.2.


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    Olivier Benghozi
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    Original Message


  • 4.  RE: MX upgrade from 19.4 to 23.4

    This message was posted by a user wishing to remain anonymous
    Posted 12-10-2025 07:03
    This message was posted by a user wishing to remain anonymous

    There are kernel changes in that upgrade path, second Olivier's suggestion.


    Original Message


  • 5.  RE: MX upgrade from 19.4 to 23.4

    Posted 29 days ago

    Thanks Oliver, I am sure this way would takes a few hours, hence why I'm asking if I can do any shortcut. 



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    MAJD GHIBEH
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    Original Message


  • 6.  RE: MX upgrade from 19.4 to 23.4

    Posted 12-11-2025 01:20

    Hi,

    Apart from i40e-NVM, check for FreeBSD version of your device. Juniper does not allow two jumps of FreeBSD.

    We have upgraded our MX240/MX480 RE-S-X6-128G-S with SCBE2-MX-S from 20.4 to 23.2. 20.4 had FreeBSD 11 and 23.2 has FreeBSD 12.

    Use " request vmhost software add /var/tmp/junos-vmhost-install-mx-xxxxxxxxxxxx.tgz no-validate" when you jump from one FreeBSD to other FreeBSD.

    Check you device hardware, its FreeBSD version and take action accordingly.



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    AFTAB AHMED
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    Original Message


  • 7.  RE: MX upgrade from 19.4 to 23.4

    Posted 29 days ago

    I would agree this way should be fine but, as I've running 19.4 - this might have an issue 

    I'm looking to do this way

    MX Install of JunOS failing when using a USB

    I'll update you once it's completed.

    Thanks

    Majd 



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    MAJD GHIBEH
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    Original Message


  • 8.  RE: MX upgrade from 19.4 to 23.4

    Posted 26 days ago

    USB method is ultimate and safest. Make sure to take configuration and logs backup as USB method deletes everything on the device.



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    AFTAB AHMED
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    Original Message