Lifecycle record
SISR4451XNPEK9-38S EOL & EOSL Dates
Cisco ISR 4451-X IOS XE UNIVERSAL - NO PAYLOAD ENCRYPTION
Lifecycle status
In EOSL Phase
SISR4451XNPEK9-38S reached its last date of support on 2025-10-31. Cisco support services are no longer available for this model.
Last checked: 2026-06-16
EOL & EOSL Dates and Details
| End-of-Life Announcement (EOL) | 2020-04-30 |
|---|---|
| End of Sale (EOS) | 2020-10-29 |
| End of Service Life (EOSL) | 2025-10-31 |
| Manufacturer | Cisco |
| Category | Routers |
| Product Series | Cisco ISR4000 |
| Part Number | SISR4451XNPEK9-38S |
| Release Date | 2013-05-20 |
| Replacement Part Number | N/A |
Lifecycle Timeline
Recorded lifecycle milestones in date order.
Additional Information
Support milestones and the official source recorded for this model.
| Last Ship Date: HW, License | 2021-01-27 |
|---|---|
| End Of New Service Attachment Date: HW | 2021-10-29 |
| End Of SW Maintenance Releases Date: HW | 2021-10-29 |
| End Of Service Contract Renewal Date: HW | 2025-01-24 |
| Official EOL Notice | View Official EOL Documentation |
More Cisco ISR4000 EOL Dates
| Part Number | Product Name | EOL Announcement | End of Sale |
|---|---|---|---|
| ISR4221-B-K9 | Cisco ISR 4221 High BW (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB) | 2019-04-30 | 2019-10-29 |
| ISR4321-B-K9 | Cisco ISR 4321 (2GE, 2NIM, 4G FLASH, 4G DRAM, IPB) | 2019-04-30 | 2019-10-29 |
| ISR4331-B-K9 | Cisco ISR 4331 (3GE, 2NIM, 1SM, 4G FLASH, 4G DRAM, IPB) | 2019-04-30 | 2019-10-29 |
| SISR4451XUK9-38S | Cisco ISR 4451-X IOS XE UNIVERSAL | 2020-04-30 | 2020-10-29 |
| SISR4451XUK9-39S | Cisco ISR 4451-X IOS XE UNIVERSAL | 2020-04-30 | 2020-10-29 |