Cisco ISR 2900 Series Replacement — What Cisco Recommends
Cisco support for the Cisco ISR 2900 Series ended Dec 2022 — unsupported units need a plan. Cisco's own end-of-life bulletin names the successor below — quoted from the source, with the successor's live support status where EOSL.ai tracks it.
The Cisco-named replacement
per-part mapping in the bulletin (10 replacement parts listed) — named in the Cisco EOL bulletin ↗ as the migration path.
C1-CISCO4321 is not yet tracked on EOSL.ai — no vendor end-of-life notice has been captured for it, which is typical of current products.
Cisco ISR 2900 Series lifecycle dates
| SKU group | End of sale | EOSL / last support | Source |
|---|---|---|---|
| Switch hardware | Dec 2017 | Dec 2022 | bulletin ↗ |
Per-part-number replacement mapping (20)
As listed in the Cisco bulletin's migration table for each part number.
| End-of-life part | Description | Bulletin-listed replacement |
|---|---|---|
| C1-CISCO2901 | C1-CISCO4321 | |
| C1-CISCO2911 | C1-CISCO4331 | |
| C1-CISCO2921 | C1-CISCO4331 | |
| C1-CISCO2951 | C1-CISCO4351 | |
| C2901-AX | ISR4321-AX | |
| C2901-CME-SRST | ISR4321-V | |
| C2901-VSEC-CUBE | ISR4321-VSEC | |
| C2901-VSEC | ISR4321-VSEC | |
| C2911-AX | ISR4331-AX | |
| C2911-AXV | ISR4331-AXV | |
| C2911-CME-SRST | ISR4331-V | |
| C2911-VSEC-CUBE | ISR4331-VSEC | |
| C2911-VSEC | ISR4331-VSEC | |
| C2911R-AX | ISR4331-AX | |
| C2911R-CME-SRST | ISR4331-V | |
| C2911R-VSEC | ISR4331-VSEC | |
| C2921-AX | ISR4331-AX | |
| C2921-AXV | ISR4331-AXV | |
| C2921-CME-SRST | ISR4331-V | |
| C2921-VSEC-CUBE | ISR4331-VSEC |
Migration questions
What is the replacement for the Cisco ISR 2900 Series?
Cisco's end-of-life bulletin names C1-CISCO4321 as the recommended migration path for the Cisco ISR 2900 Series. The exact wording and any per-part-number mapping are in the linked bulletin.
Is the Cisco ISR 2900 Series end of life?
Cisco support for the Cisco ISR 2900 Series ended Dec 2022 — unsupported units need a plan. Full lifecycle dates by part number: https://eosl.ai/system/cisco-isr-2900/.
Is there a per-part-number replacement mapping for the 2900 Series?
Yes — the bulletin maps replacements at the part-number level for 20 SKUs (for example C1-CISCO2901 → C1-CISCO4321). The full table is on this page.
Do I have to buy the Cisco-recommended replacement?
No. The bulletin's named successor is Cisco's suggested path, not an obligation. Teams also keep 2900 Series units running under third-party maintenance after the support cutoff, migrate to a different vendor, or run low-criticality units to failure with the risk documented. See the support-options guide for the trade-offs.