Cisco CISCO3945/K9 End of Life & End of Support
Cisco 3945 Integrated Services Router
Past Last Date of Support (Dec 31, 2022)The largest 3900-series chassis with four service-module slots for the most demanding branches. Cisco's bulletin migrates it to the ISR 4451-X; the current-generation successor is the Catalyst 8300.
Cisco CISCO3945/K9 lifecycle milestone dates
- End-of-Sale Date
- Dec 9, 2017
- End of Software Maintenance
- Dec 9, 2020
- Last Date of Support (LDoS)
- Dec 31, 2022
Dates per Cisco’s official End-of-Sale/End-of-Life bulletin. Verify against your support contract before acting.
Running past End-of-Sale or Last Date of Support means no new Cisco TAC, hardware replacement, or security fixes. Uniqcli, an authorized Cisco partner, scopes a like-for-like or better replacement, confirms TAA compliance, accepts the Government Purchase Card (GPC), and plans a low-risk cutover.
Compare CISCO3945/K9 vs its replacement → · Prefer to keep it running? Cisco no longer sells SmartNet for this model. Extend support with third-party maintenance →
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Frequently asked questions
When is the Cisco CISCO3945/K9 end of life?
Cisco announced End-of-Sale for the CISCO3945/K9 effective Dec 9, 2017. The Last Date of Support (LDoS) is Dec 31, 2022, after which Cisco no longer provides support. It is past its last date of support.
What replaces the Cisco CISCO3945/K9?
Cisco's recommended migration is the Cisco ISR 4451 (4GE, 3NIM, 2SM, 8G Flash, 4G DRAM). Uniqcli, an authorized Cisco partner, can quote the replacement TAA-compliant and GPC-payable, and help plan the cutover.
Can I still get support for the CISCO3945/K9?
Not from Cisco. The CISCO3945/K9 passed its Last Date of Support (Dec 31, 2022), so Cisco TAC, hardware replacement, and SmartNet renewals are no longer available. Independent third-party maintenance can still cover the hardware itself, typically well below OEM renewal rates. Uniqcli can review your install base, confirm coverage, and quote extended support or a refresh side by side.