Cisco Catalyst 3850 WS-C3850-12XS-S 12-Port 10G SFP+ Fiber Switch — IP Base, Refurbished
Warranty: Lifetime
Twelve 10G SFP+ ports in 1U — a small fiber aggregation switch for an existing 3850 stack
Cisco WS-C3850-12XS-S — Catalyst 3850, 12x 1G/10G SFP+, IP Base
→ Only one uplink module fits this model. Cisco lists the C3850-NM-4-10G for the WS-C3850-12XS. The 2x 40G module is supported on the 24XS, 24XU and 12X48U, not the 12XS.
Part Number: WS-C3850-12XS-S
SKU: WS-C3850-12XS-S-R
Description: Catalyst 3850 12x 1G/10G SFP+, IP Base
The WS-C3850-12XS-S has twelve SFP/SFP+ ports that run at 1G or 10G, with the IP Base feature set. It is commonly used to aggregate 10G fiber from access closets.
Optics are not included; each port needs an SFP or SFP+ module or a DAC.
Which One Do I Need?
| Part | Ports | License |
|---|---|---|
| WS-C3850-12XS-S — this listing | 12x 1G/10G SFP+ | IP Base |
| WS-C3850-12XS-E | 12x 1G/10G SFP+ | IP Services |
| WS-C3850-24XS-E | 24x 1G/10G SFP+ | IP Services |
The suffix is the license. -L is LAN Base, -S is IP Base, -E is IP Services. Same hardware, different feature set as shipped.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | WS-C3850-12XS-S |
| Ports | 12x 1G/10G SFP+ |
| Port type | SFP/SFP+ fiber, 1G or 10G per port |
| Supported uplink modules | C3850-NM-4-10G only (Cisco does not list C3850-NM-2-40G, C3850-NM-8-10G or the 1G modules for the 12XS) |
| Stacking | StackWise-480 (Catalyst 3850 only) and StackPower |
| License as shipped | IP Base (-S) |
| Weight | 12.9 lb per Cisco data sheet |
| Lifecycle | End of sale / end of life announced by Cisco |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: Cisco Catalyst 3850 Series data sheet and the Catalyst 3850 hardware installation guide (network modules).
Good to Know
- End of life. Cisco has announced end of sale and end of life for the Catalyst 3850. Refurbished units are the practical way to spare or extend an existing 3850 stack.
- Stack with 3850s only. StackWise-480 stacks Catalyst 3850s with each other; a 3850 does not stack with a 3650 or a Catalyst 9300.
- Uplink module. Check which network module is fitted, or order one. A slot left empty needs a blank for airflow.
Quick Checklist — Is This the Right Switch?
You are adding to, or sparing, a Catalyst 3850 network. You need 12x 1g/10g sfp+ with the IP Base feature set. Your uplink plan uses a module from the supported list above.
Availability
Refurbished and tested · Ships from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
We confirm stock and lead time with you before an order ships. Building or sparing a stack? We quote switches, uplink modules, stack cables and power supplies together. Request a quote →
Warranty: lifetime, backed by Resilient Tec — not a manufacturer term. When something fails you reach a named seller in the US, not a ticket queue.
You Might Also Need
- C3850-NM-4-1G — 1G uplink module
- STACK-T1-50CM StackWise-480 cable — data stacking
- CAB-SPWR-30CM StackPower cable — power stacking
- PWR-C1-715WAC — spare power supply
Related Guides
Twelve 10G SFP+ ports in 1U — a small fiber aggregation switch for an existing 3850 stack
Cisco WS-C3850-12XS-S — Catalyst 3850, 12x 1G/10G SFP+, IP Base
→ Only one uplink module fits this model. Cisco lists the C3850-NM-4-10G for the WS-C3850-12XS. The 2x 40G module is supported on the 24XS, 24XU and 12X48U, not the 12XS.
Part Number: WS-C3850-12XS-S
SKU: WS-C3850-12XS-S-R
Description: Catalyst 3850 12x 1G/10G SFP+, IP Base
The WS-C3850-12XS-S has twelve SFP/SFP+ ports that run at 1G or 10G, with the IP Base feature set. It is commonly used to aggregate 10G fiber from access closets.
Optics are not included; each port needs an SFP or SFP+ module or a DAC.
Which One Do I Need?
| Part | Ports | License |
|---|---|---|
| WS-C3850-12XS-S — this listing | 12x 1G/10G SFP+ | IP Base |
| WS-C3850-12XS-E | 12x 1G/10G SFP+ | IP Services |
| WS-C3850-24XS-E | 24x 1G/10G SFP+ | IP Services |
The suffix is the license. -L is LAN Base, -S is IP Base, -E is IP Services. Same hardware, different feature set as shipped.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | WS-C3850-12XS-S |
| Ports | 12x 1G/10G SFP+ |
| Port type | SFP/SFP+ fiber, 1G or 10G per port |
| Supported uplink modules | C3850-NM-4-10G only (Cisco does not list C3850-NM-2-40G, C3850-NM-8-10G or the 1G modules for the 12XS) |
| Stacking | StackWise-480 (Catalyst 3850 only) and StackPower |
| License as shipped | IP Base (-S) |
| Weight | 12.9 lb per Cisco data sheet |
| Lifecycle | End of sale / end of life announced by Cisco |
| Condition | Refurbished |
| Warranty | Lifetime, backed by Resilient Tec |
Source: Cisco Catalyst 3850 Series data sheet and the Catalyst 3850 hardware installation guide (network modules).
Good to Know
- End of life. Cisco has announced end of sale and end of life for the Catalyst 3850. Refurbished units are the practical way to spare or extend an existing 3850 stack.
- Stack with 3850s only. StackWise-480 stacks Catalyst 3850s with each other; a 3850 does not stack with a 3650 or a Catalyst 9300.
- Uplink module. Check which network module is fitted, or order one. A slot left empty needs a blank for airflow.
Quick Checklist — Is This the Right Switch?
You are adding to, or sparing, a Catalyst 3850 network. You need 12x 1g/10g sfp+ with the IP Base feature set. Your uplink plan uses a module from the supported list above.
Availability
Refurbished and tested · Ships from Resilient Tec in Knoxville, TN · Free standard shipping on US orders.
We confirm stock and lead time with you before an order ships. Building or sparing a stack? We quote switches, uplink modules, stack cables and power supplies together. Request a quote →
Warranty: lifetime, backed by Resilient Tec — not a manufacturer term. When something fails you reach a named seller in the US, not a ticket queue.
You Might Also Need
- C3850-NM-4-1G — 1G uplink module
- STACK-T1-50CM StackWise-480 cable — data stacking
- CAB-SPWR-30CM StackPower cable — power stacking
- PWR-C1-715WAC — spare power supply