Juniper EX4300-48P Update

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VoidCrawler

New Member
May 24, 2026
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Hey everyone!

Love this forum, great to finally be posting here.

I recently picked up my first serious switch (Juniper EX4300-48P), a, and I'm hooked.
Currently running Junos 19.2R2.7 which is pretty old.

I want to upgrade to 21.4R3-S6 which from my research is the newest supported version for the regular EX4300 (dropped after 22.x).
I also need the matching JWeb package.

Problem is I couldn't get access to Juniper's download portal and a support contract is just too expensive for a homelab.
Found some community mirrors but they don’t work or host some old versions

Anyone able to point me in the right direction and some tips for upgrading?
DMs welcome too.
Thanks a lot, you guys and girls are awesome!