https://supportportal.juniper.net/s/article/Junos-upgrade-paths-for-SRX-platforms
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Olivier Benghozi
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Original Message:
Sent: 04-20-2026 02:53
From: igor.hamzic81
Subject: EX4600 direct upgrade to version 21.4R3-S12
Thank you for the response. I will upgrade one night this week.
I usually follow the rule to not upgrade more than 3 major versions but in the past I had recommendations that I can upgrade directly to a version. Do you have a link where I could check this info?
Original Message:
Sent: 04-17-2026 07:38
From: Olivier Benghozi
Subject: EX4600 direct upgrade to version 21.4R3-S12
Yes.
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Olivier Benghozi
Original Message:
Sent: 04-16-2026 05:07
From: igor.hamzic81
Subject: EX4600 direct upgrade to version 21.4R3-S12
Hi all,
I have a EX4600 switch stack that I need to upgrade from version 20.4R3-S10 to version 21.4R3-S12 and I was wondering if I can upgrade it directly?
From digging online it seems it could be possible if I use the no-validate option due to FreeBSD upgrade but I would like to be sure.
Thanks in advance for the help.
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