Cisco Firepower eXtensible Operating System – EOL / EOSL
Series Overview
- Brand
- Cisco
- Category
- Software
- Series
- Cisco Firepower eXtensible Operating System
- Total Models
- 15
Lifecycle Notes
We summarize official Cisco EOL bulletins for quick planning. Use the milestones below to align maintenance windows and budget.
-
1
EOL — Announcement — plan upgrade in advance.
-
2
EOS — End of sale — confirm last order and stock.
-
3
EOSL — End of support — schedule replacement.
Always verify dates with official Cisco notices; minor revisions may occur.
Models in this Series
Showing 1–15
of 15 items
| Part Number | Product Name | EOL Announcement | EOS | EOSL |
|---|---|---|---|---|
| SF-F4KFXOS2.4.1-K9 | Cisco Firepower Extensible Operating System SF-F4KFXOS2.4.1-K9 | 2019-10-31 | 2020-04-30 | 2023-04-30 |
| SF-F4KFXOS2.9.1-K9 | Cisco Firepower eXtensible Operating System SF-F4KFXOS2.9.1-K9 | 2021-01-08 | 2021-07-09 | 2024-07-31 |
| SF-F4KFXS2.11.1-K9 | Cisco Firepower Extensible Operating System SF-F4KFXS2.11.1-K9 | 2023-06-23 | 2023-12-22 | 2025-12-31 |
| SF-F4KFXS2.12.1-K9 | Cisco Firepower eXtensible Operating System SF-F4KFXS2.12.1-K9 | 2025-05-20 | 2025-11-18 | 2027-11-30 |
| SF-F4KFXS2.12.2-K9 | Cisco Firepower eXtensible Operating System SF-F4KFXS2.12.2-K9 | 2025-05-20 | 2025-11-18 | 2027-11-30 |
| SF-F9K-FXOS2.0-K9 | Cisco Firepower Extensible Operating System SF-F9K-FXOS2.0-K9 | 2019-11-22 | 2020-05-22 | 2023-05-31 |
| SF-F9K-FXOS2.1-K9 | Cisco Firepower eXtensible Operating System SF-F9K-FXOS2.1-K9 | 2018-01-16 | 2018-07-17 | 2023-07-31 |
| SF-F9KFXOS2.4.1-K9 | Cisco Firepower Extensible Operating System SF-F9KFXOS2.4.1-K9 | 2019-10-31 | 2020-04-30 | 2023-04-30 |
| SF-F9KFXOS2.9.1-K9 | Cisco Firepower eXtensible Operating System SF-F9KFXOS2.9.1-K9 | 2021-01-08 | 2021-07-09 | 2024-07-31 |
| SF-F9KFXS2.11.1-K9 | Cisco Firepower Extensible Operating System SF-F9KFXS2.11.1-K9 | 2023-06-23 | 2023-12-22 | 2025-12-31 |
| SF-F9KFXS2.12.1-K9 | Cisco Firepower eXtensible Operating System SF-F9KFXS2.12.1-K9 | 2025-05-20 | 2025-11-18 | 2027-11-30 |
| SF-F9KFXS2.12.2-K9 | Cisco Firepower eXtensible Operating System SF-F9KFXS2.12.2-K9 | 2025-05-20 | 2025-11-18 | 2027-11-30 |
| SF-FXOS4K-2.0-K9 | Cisco Firepower Extensible Operating System SF-FXOS4K-2.0-K9 | 2019-11-22 | 2020-05-22 | 2023-05-31 |
| SF-FXOS4K-2.1-K9 | Cisco Firepower eXtensible Operating System SF-FXOS4K-2.1-K9 | 2018-01-16 | 2018-07-17 | 2023-07-31 |
| SF-FXOS9K-2.0-K9 | Cisco Firepower Extensible Operating System SF-FXOS9K-2.0-K9 | 2019-11-22 | 2020-05-22 | 2023-05-31 |