Juniper EX4300 end of life: support dates
By Nico De Muynck · Updated August 2, 2026
Supported until March 31, 2029.
The Juniper EX4300 reaches its End of Support on March 31, 2029. That is the hard stop: after it Juniper provides no support, no hardware replacement and no software fixes.
The EX4300 is one of Juniper's most widely deployed access switches. It is already past its last order date, with support running to 2029.
EX4300 lifecycle milestones
These dates come from Juniper's published End of Life milestone table for the EX4300.
| Milestone | Date |
|---|---|
| EOL announced | 2022-06-24 |
| Last order date | 2024-03-31 |
| Last date to convert warranty | 2025-03-31 |
| Same day support discontinued | 2029-03-31 |
| Next day support discontinued | 2029-03-31 |
| End of Support | 2029-03-31 |
The EX4300-48MP is the exception in this family: it was announced separately and runs to December 29, 2031. Everything else on the EX4300 line ends in March 2029.
What these dates mean
Last order date is the last day the EX4300 could be ordered from Juniper. Last date to convert warranty is the cutoff for moving a warranty onto a support contract. End of Support is the one that matters most: after it there is no JTAC support, no RMA replacement and no software fixes, so the switch becomes a standing security and compliance risk. For how Juniper's lifecycle works in full, see the Juniper EOL guide.
What replaces the EX4300?
Juniper positions the EX4400 Series as the successor to the EX4300. If you are still running EX4300 hardware in production, budget the refresh rather than waiting for a failed RMA to force it. New to the terminology? See EOL vs EOS vs EOSL.
Check your Juniper fleet in seconds.
Paste your switches into the free EOL check to see what is past end-of-support right now, then track every date automatically with warnings months ahead.
Run a free EOL checkNo signup for the check · free account tracks up to 5 assets