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C1-CISCO4431

ISR 3900 Series —

EOSL — PAST
42 mo
past end of service life

Lifecycle position

now
availableend of saleservice
Available—
End of saleDec 2017
End of serviceDec 2022Cisco bulletin ↗
Last security firmwareSW maintenance ended 2020-12

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 3900 Series

C1-CISCO3925›C1-CISCO3925E›C1-CISCO3945›C1-CISCO3945E›C3900-SPE100›C3900-SPE150›C3900-SPE200›C3900-SPE250›

C1-CISCO4431 — questions

Is the Cisco C1-CISCO4431 still supported?

No. Cisco's last date of support for C1-CISCO4431 was Dec 2022, per the Cisco end-of-life bulletin — it is past end of service life.

When did the C1-CISCO4431 reach end of sale?

C1-CISCO4431 reached end of sale Dec 2017, per the Cisco end-of-life bulletin.

What is the last date of support (EOSL) for the C1-CISCO4431?

Dec 2022, according to the Cisco end-of-life bulletin.

Can the C1-CISCO4431 be maintained after Cisco support ends?

After the last date of support, C1-CISCO4431 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.