Cisco UCS B420 M3 Series Replacement — What Cisco Recommends
Cisco support for the Cisco UCS B420 M3 Series ended Dec 2021 — 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 (4 replacement parts listed) — named in the Cisco EOL bulletin ↗ as the migration path.
UCSB-B420-M4 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 UCS B420 M3 Series lifecycle dates
| SKU group | End of sale | EOSL / last support | Source |
|---|---|---|---|
| Switch hardware | Dec 2016 | Dec 2021 | bulletin ↗ |
Per-part-number replacement mapping (6)
As listed in the Cisco bulletin's migration table for each part number.
| End-of-life part | Description | Bulletin-listed replacement |
|---|---|---|
| UCSB-B420-M3 | UCSB-B420-M4 | |
| UCSB-B420-M3-CH | UCSB-B420-M4-CH | |
| UCSB-B420-M3-CH2 | UCSB-B420-M4-CH | |
| UCSB-B420-M3-D | UCSB-B420-M4-U | |
| UCSB-B420-M3-U | UCSB-B420-M4-U | |
| UCSB-BAFF-B420-M3 | UCSB-CBAF-B420-M4 |
Migration questions
What is the replacement for the Cisco UCS B420 M3 Series?
Cisco's end-of-life bulletin names UCSB-B420-M4 as the recommended migration path for the Cisco UCS B420 M3 Series. The exact wording and any per-part-number mapping are in the linked bulletin.
Is the Cisco UCS B420 M3 Series end of life?
Cisco support for the Cisco UCS B420 M3 Series ended Dec 2021 — unsupported units need a plan. Full lifecycle dates by part number: https://eosl.ai/system/cisco-ucs-b420-m3/.
Is there a per-part-number replacement mapping for the B420 M3 Series?
Yes — the bulletin maps replacements at the part-number level for 6 SKUs (for example UCSB-B420-M3 → UCSB-B420-M4). 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 B420 M3 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.