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Modular distribution switch · Switch hardware

C1-C4503-E

Catalyst 4500-E Series —

EOSL — PAST
8 mo
past end of service life

Lifecycle position

now
availableend of saleservice
Available—
End of saleOct 2020
End of serviceOct 2025Cisco bulletin ↗
Last security firmwareSW maintenance ended 2021-10

Options from here

Third-party maintenance

Covered past the OEM cutoff by an independent maintainer.

Pre-stock spares

Modules and units still circulate on the secondary market.

Schedule migration

Carrying production traffic? Set the replacement window now, not mid-outage.

Run to failure

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

Other SKUs in 4500-E Series

WS-C4K-PS-CVR›WS-C4KE-PS-CVR›WS-X4503-FILTER›WS-X4503E-19CNTR›WS-X4503E-23CNTR›WS-X4503E-ACC-KIT›C4503-E›WS-X4506-FILTER›

C1-C4503-E — questions

Is the Cisco C1-C4503-E still supported?

No. Cisco's last date of support for C1-C4503-E was Oct 2025, per the Cisco end-of-life bulletin — it is past end of service life.

When did the C1-C4503-E reach end of sale?

C1-C4503-E reached end of sale Oct 2020, per the Cisco end-of-life bulletin.

What is the last date of support (EOSL) for the C1-C4503-E?

Oct 2025, according to the Cisco end-of-life bulletin.

Can the C1-C4503-E be maintained after Cisco support ends?

After the last date of support, C1-C4503-E 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.