WS-C3750X-12S-S

Catalyst 3750-X Series: 12-port SFP, IP Base

EOSL — PAST

60 mo

past end of service life

Lifecycle position

now

availableend of saleservice

AvailableJan 2010

End of saleOct 2016

End of serviceOct 2021Cisco bulletin ↗

Vendor-listed replacementWS-C3850-12S-Smigration options ↗

Last security firmwareIOS 15.2(4)E (SW maint. ended Oct 2017; security fixes ended Oct 2019)

Options from here

Third-party maintenance

Keep it in production past the OEM cutoff with an independent maintainer.

Pre-stock spares

Buy spares now, while units still circulate on the secondary market. eBay listings for WS-C3750X-12S-S ↗

Plan replacement

It is unsupported today. Set a migration timeline and budget.

Run to failure

Low-criticality role: document the risk, harden backups, retire on your terms.

Other SKUs in 3750-X Series

WS-C3750X-24T-S24-port data, IP Base›WS-C3750X-24P-S24-port PoE+, IP Base›WS-C3750X-48T-S48-port data, IP Base›WS-C3750X-48P-S48-port PoE+, IP Base›WS-C3750X-24T-L24-port data, LAN Base›WS-C3750X-24P-L24-port PoE+, LAN Base›WS-C3750X-48T-L48-port data, LAN Base›WS-C3750X-48P-L48-port PoE+, LAN Base›

Questions about WS-C3750X-12S-S

Is the Cisco WS-C3750X-12S-S still supported?

No. Cisco's last date of support for WS-C3750X-12S-S was Oct 2021 (per the Cisco EOL bulletin). It is past end of service life.

When did the WS-C3750X-12S-S reach end of sale?

WS-C3750X-12S-S reached end of sale Oct 2016, per the Cisco EOL bulletin.

What is the last date of support (EOSL) for the WS-C3750X-12S-S?

Oct 2021, per the Cisco EOL bulletin.

What is the replacement for the WS-C3750X-12S-S?

Cisco's end-of-life bulletin lists WS-C3850-12S-S as the replacement for WS-C3750X-12S-S.

Can the WS-C3750X-12S-S be maintained after Cisco support ends?

After the last date of support, WS-C3750X-12S-S units can often be kept in production through third-party maintenance providers. Cisco no longer issues software fixes, support, or hardware replacement for it.