Junos OS

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  • 1.  Trying to update a new EX4300-24P right out of the Box

    Posted 12-11-2025 12:42

    Hello,

    We just purchased a Juniper EX3400-24P and it has version 18.4 installed.  We want to install another version that we have so we can put it into production.

    However when I have tried to perform an Update and receved storage errors.  show system storage output shows /dev/da0s1a (root /) is 87% full, and several package mounts are at 100%.

    Message from syslogd@ at Oct 13 16:03:33  ...
     fpc0     Frame 03: sp = 0x04be5520, pc = 0x018535tar: junos-ex-20.4R3-S1.3.tgz: Wrote only 0 of 10240 bytes
    tar: Skipping to next header
    tar: Archive contains obsolescent base-64 headers
    tar: jphone-home-20.4R3-S1.3.tgz: Wrote only 0 of 10240 bytes
    tar: Skipping to next header

    My question is how can I perform a full formal of the system using the USB?

    Should I try this:

    root@:RE:0% mkdir -p /var/tmp/usb
    root@:RE:0% mount_msdosfs /dev/da1s1 /var/tmp/usb
    root@:RE:0% ls /var/tmp/usb
    ex4300-jinstall-ex-4300-20.4R3-S1.3-signed.tgz
    root> request system software add /var/tmp/usb/ex4300-jinstall-ex-4300-20.4R3-S1.3-signed.tgz no-copy partition 





    ------------------------------
    KJS ADMIN
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  • 2.  RE: Trying to update a new EX4300-24P right out of the Box

    Posted 13 days ago

    Your proposed update syntax looks correct.

    I would suggest running "request system storage cleanup" first to free up space.



    ------------------------------
    PAUL PETERSON
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    Original Message


  • 3.  RE: Trying to update a new EX4300-24P right out of the Box

    Posted 13 days ago

    I found updating over SSH is the easiest way to update the switches. You will have to upgrade the firmware first, then upgrade the JUNOS.



    ------------------------------
    MICHAEL TUMA
    ------------------------------

    Original Message


  • 4.  RE: Trying to update a new EX4300-24P right out of the Box

    Posted 13 days ago

    I would follow these instructions: https://www.juniper.net/documentation/us/en/software/junos/junos-install-upgrade/topics/topic-map/install-software-on-ex.html#id-understanding-software-installation-on-ex-series-switches__d24766e132



    ------------------------------
    MICHAEL TUMA
    ------------------------------

    Original Message


  • 5.  RE: Trying to update a new EX4300-24P right out of the Box

    Posted 13 days ago

    KSJ Admin,

                   We have experienced the same issue with EX3400-48T switches. We sound succes with the instructions in KB31198.

    Wouldn't it would be great if Juniper would increase the storage capacity...

    https://supportportal.juniper.net/s/article/EX-Not-enough-storage-while-upgrading-Junos-EX2300-and-EX3400?language=en_US

     

    Justin McKinley

     

    302.738.8800 main | 302.738.1188 x368 direct
    302.738.7381 fax
    Applied Control Engineering, Inc. (ACE)
    700 Creek View Road
    Newark, DE 19711
    www.ace-net.com

     

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    Original Message