Cisco ISR 2900 Series Replacement: What Cisco Recommends
Cisco support for the Cisco ISR 2900 Series has ended for some part numbers (last group runs to Apr 2025). 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 ↗ |
| ISR 2911 Inmarsat NSD | Apr 2020 | Apr 2025 | bulletin ↗ |
| ISR 2911-T temperature-tolerant | Oct 2016 | Oct 2021 | bulletin ↗ |
Per-part-number replacement mapping (36)
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 | |
| C2921-VSEC | Cisco 2921 Voice Sec. Bundle, PVDM3-32, UC&SEC Lic, FL-CUBE10 | ISR4331-VSEC |
| C2951-AX | Cisco 2951 AX Bundle w/ APP, SEC lic | ISR4351-AX |
| C2951-AXV | Cisco 2951 AXV Bundle, PVDM3-32, APP, SEC, UC Lic, CUBE-10 | ISR4351-AXV |
| C2951-CME-SRST | 2951 Voice Bundle w/ PVDM3-32, FL-CME-SRST-25, UC Lic, FL-CUBE10 | ISR4351-V |
| C2951-VSEC-CUBE | C2951 UC SEC CUBE Bundle, PVDM3-32, UC SEC Lic, FL-CUBEE-25 | ISR4351-VSEC |
| C2951-VSEC | Cisco 2951 Voice Sec. Bundle, PVDM3-32, UC&SEC Lic, FL-CUBE10 | ISR4351-VSEC |
| CISCO2901-SEC | Cisco 2901 Security Bundle w/ SEC license PAK | ISR4321-SEC |
| CISCO2901-V | Cisco 2901 Voice Bundle, PVDM3-16, UC License PAK, FL-CUBE10 | ISR4321-V |
| CISCO2911-SEC | Cisco 2911 Security Bundle w/ SEC license PAK | ISR4331-SEC |
| CISCO2911-V | Cisco 2911 Voice Bundle, PVDM3-16, UC License PAK, FL-CUBE10 | ISR4331-V |
| CISCO2911R-SEC | Cisco 2911 Security Bundle w/ SEC license PAK | ISR4331-SEC |
| CISCO2911R-V | Cisco 2911 UC Bundle, PVDM3-16, UC License PAK | ISR4331-V |
| CISCO2921-SEC | Cisco 2921 Security Bundle w/ SEC license PAK | ISR4331-SEC |
| CISCO2921-V | Cisco 2921 Voice Bundle, PVDM3-32, UC License PAK, FL-CUBE10 | ISR4331-V |
| CISCO2951-SEC | Cisco 2951 Security Bundle w/ SEC license PAK | ISR4351-SEC |
| CISCO2951-V | Cisco 2951 Voice Bundle, PVDM3-32, UC License PAK, FL-CUBE10 | ISR4351-V |
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 has ended for some part numbers (last group runs to Apr 2025). 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 36 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.