Catalyst 3750-X Series — 48-port PoE+, IP Base
Covered past the OEM cutoff by an independent maintainer.
Modules and units still circulate on the secondary market.
Carrying production traffic? Set the replacement window now, not mid-outage.
Low-criticality role — document the risk, harden backups, retire on your terms.
No. Cisco's last date of support for WS-C3750X-48P-S was Oct 2021, per the Cisco end-of-life bulletin — it is past end of service life.
WS-C3750X-48P-S reached end of sale Oct 2016, per the Cisco end-of-life bulletin.
Oct 2021, according to the Cisco end-of-life bulletin.
After the last date of support, WS-C3750X-48P-S units can often be kept in production through third-party maintenance providers. Cisco no longer issues software fixes, TAC support, or hardware replacement for it.