Past EOSL
The Cisco 4300ISR reached End of Service Life (EOSL) on 31 May 2026.
End of sale
10 May 2021EOSL
31 May 2026
10 May 2021EOSL
31 May 2026
- Manufacturer
- Cisco
- Product family
- 4000 Series Integrated Services Routers ISR
- Models / part numbers
- MEM-4300-2G, ISR4321-EN-3Y-20M, ISR4321-EN-3Y-50M, ISR4321-EN-3Y-100M, ISR4321-PR-3Y-20M, ISR4321-PR-3Y-50M, ISR4321-PR-3Y-100M
- Category
- Router
- End of sale / EOL
- 10 May 2021
- End of Service Life
- 31 May 2026
- Source
- OEM end-of-life notice · view source
- Notes
- Cisco end-of-life bulletin (announced 2020-11-09). Covers 7 part numbers, e.g. MEM-4300-2G, ISR4321-EN-3Y-20M, ISR4321-EN-3Y-50M.
- Last checked
- 14 Nov 2026
Frequently asked questions
When is the Cisco 4300ISR End of Service Life?
Cisco 4300ISR reached End of Service Life on 31 May 2026, after End of Sale on 10 May 2021.
What happens after the 4300ISR reaches EOSL?
Cisco stops selling support contracts, spare parts and firmware updates. The hardware keeps working, but break/fix, parts and engineering help must come from a third-party maintenance provider.
Can SLA Expert support the 4300ISR after EOSL?
Yes — SLA Expert provides multi-vendor third-party maintenance, spares and field engineering for post-EOSL Cisco equipment across the Middle East and Africa. Request a quote to confirm coverage for your units.
Related Cisco EOSL dates
| Model | Category | End of sale | EOSL date | Status | |
|---|---|---|---|---|---|
| ISR4200, ISR4300 and select ISR4400 Series Platform ISR4221-SEC/K9, ISR4221/K9, ISR4221X/K9, ISR4321-AX/K9, ISR4321-AXV/K9, ISR4321-DNA, ISR4321-PM20, ISR4321-SEC/K9, ISR4321-V/K9, ISR4321-VSEC/K9, ISR4321/K9, ISR4331-AX/K9 | Router | 07 Nov 2023 | 30 Nov 2028 | OEM supported | |
| 4G DRAM (1 x 4G) for Cisco ISR 4300 Series Routers MEM-4300-4G | Router | 18 Mar 2019 | 31 Jan 2029 | OEM supported | |
| ISR4200 and ISR4300 Series Platform for Brazil ISR4321BR/K9, ISR4331BR/K9 | Router | 26 Jan 2024 | 31 Jan 2029 | OEM supported | |
| ISR4200, ISR4300 and select ISR4400 Series Platform Spares ACS-4220-RM-19, ACS-4320-BEZEL, ACS-4320-FANASSY, ACS-4320-RM-19, ACS-4330-BEZEL, ACS-4330-DCBEZEL, ACS-4330-FANASSY, ACS-4330-RM-19, ACS-4330-RM-23, ACS-4330-WM, ACS-4350-BEZEL, ACS-4430-BEZEL | Router | 26 Jan 2024 | 31 Jan 2029 | OEM supported | |
| ISR4000 LTE Advanced NIM Promotional Product NIM-LTEA-LAPRM | Router | 04 Nov 2022 | 30 Nov 2027 | OEM supported | |
| CAT 6 Network Interface Modules (NIMs) NIM-LTEA-EA, NIM-LTEA-EA-PM20, NIM-LTEA-LA | Router | 30 Jan 2025 | 31 Jan 2030 | OEM supported |