Junos OS

 View Only
last person joined: yesterday 

Ask questions and share experiences about Junos OS.
  • 1.  I want downgrade EX4200 switch JUNOS from 12.3R9-S1 to 12.3R6.6

    Posted 04-07-2022 10:15
    Hello Team,
    We have seen one of our stack switch showing INACTIVE mode due to OS mismatch . Now we plan to downgrade OS from 12.3R9-S1 to 12.3R6.6.
    Can anybody help us with process details documents for this downgrade. 
    fpc0: JUNOS Base OS boot [12.3R6.6]   ===> Active
    fpc1: JUNOS Base OS boot [12.3R9-S1]  ===> Inactive

    ------------------------------
    Suraj Shinde
    ------------------------------


  • 2.  RE: I want downgrade EX4200 switch JUNOS from 12.3R9-S1 to 12.3R6.6

     
    Posted 04-07-2022 19:25
    Upgrade and downgrade procedure is the same. You should upgrade both to 12.3R12-S21 instead of downgrading to R6. R6 is eight years old.

    https://www.juniper.net/documentation/us/en/software/junos/junos-install-upgrade/topics/topic-map/install-software-on-ex.html

    Make sure to copy the primary partition to the backup after the upgrade/downgrade so you don't end up with a mismatch again using: request system snapshot media internal slice alternate



  • 3.  RE: I want downgrade EX4200 switch JUNOS from 12.3R9-S1 to 12.3R6.6

    Posted 04-07-2022 19:26
    Hi,

    Process downgrade it same as process upgrade. Transfer the firmware to /var/tmp/ . Then execute command request system software add.


    Thanks