Vendor EOL guides · Cisco · Catalyst 3750-X
Cisco Catalyst 3750-X end of life: key dates
By Nico De Muynck · Updated July 25, 2026
This switch is past its Last Date of Support.
The Cisco Catalyst 3750-X reached, or reaches, its Last Date of Support (LDoS) on October 31, 2021. That is the hard stop: no TAC, no RMA, no software fixes after it.
Cisco Catalyst 3750-X lifecycle milestones
These dates are from Cisco's official end-of-sale and end-of-life bulletin (EOL10623). They apply to the WS-C3750X part numbers.
| Milestone | Date |
|---|---|
| End-of-Life announcement | 2015-10-31 |
| End of Sale | 2016-10-30 |
| Last ship date | 2017-01-28 |
| End of Software Maintenance | 2017-10-30 |
| End of Vulnerability and Security support | 2019-10-30 |
| Last Date of Support (LDoS) | 2021-10-31 |
What these dates mean
End of Sale is the last day the Catalyst 3750-X could be ordered from Cisco. End of Software Maintenance is the last day it received bug-fix releases. Last Date of Support (LDoS) is the one that matters most: after it, there is no TAC support, no RMA replacement and no security fixes, so an unpatched switch on your network becomes a standing security and compliance risk. For the full milestone chain, see what Cisco LDoS means.
What replaces the Catalyst 3750-X?
Cisco positions the Cisco Catalyst 9300 Series as the successor. If you are still running Catalyst 3750-X switches in production, budget the refresh now rather than discovering the gap during an audit or a failed RMA. New to the terminology? See EOL vs EOS vs EOSL.
Track your Catalyst 3750-X fleet automatically.
Import your switches and EOL Tracking fills in this date for you, then warns you months before every deadline by email, Slack or Teams.
Start free, up to 5 assetsNo credit card · CSV and NetBox import for whole fleets