Cisco WS-C3850-12XS-S Catalyst 3850 Series Switch
The Cisco WS-C3850-12XS-S Catalyst 3850 Series Switch is a high-performance, enterprise-class Layer 3 managed switch from Cisco Systems designed for demanding business networks, data centers, and campus environments. It features 12 x 10 Gigabit SFP+ ports for high-speed fiber connectivity and supports advanced routing, security, and stacking technologies to deliver robust network performance and scalability.
Key Features
- 12 x 10G SFP+ fiber ports for high-speed uplinks and connections
- Enterprise-grade Layer 3 switching with IP Base software
- Cisco StackWise-480 technology for resilient stacking up to 9 switches
- Runs Cisco IOS XE with support for advanced routing, QoS, and security
- AES-256 MACsec encryption for secure link encryption on supported ports
- 1 RU rack-mountable form factor
- 350W AC internal power supply included
Cisco WS-C3850-12XS-S Specifications
| Specification | Details |
|---|
| Product Model | WS-C3850-12XS-S |
| Series | Cisco Catalyst 3850 Series |
| Switch Type | Enterprise Stackable Managed Switch |
| Feature Set | IP Base (Layer 3 capabilities) |
| Ports | 12 × SFP+ 10 Gigabit Ethernet (fiber) |
| Uplink Module Support | Modular uplinks (e.g., C3850-NM-4-1G, C3850-NM-2-10G) |
| Switching Capacity | ~320 Gbps (varies by config) |
| Forwarding Performance | ~227 Mpps (model family) |
| Stacking Technology | Cisco StackWise-480 |
| Stack Bandwidth | 480 Gbps |
| Maximum Stack Units | Up to 9 switches |
| DRAM (RAM) | Typically 4 GB (3850 family) |
| Flash Memory | Typically 2 GB (3850 family) |
| VLAN Support | Up to 4,000 VLANs (standard Catalyst capability) |
| Routing Features | IPv4 & IPv6 Layer 3 routing (with IP Base) |
| Wireless Controller Support | Integrated wired + wireless controller capabilities |
| Power Supply | 350 W AC (built-in) |
| Redundant Power Support | Yes (optional external) |
| Form Factor | 1U Rack Mount |
| Dimensions (H×W×D) | ~4.45 × 44.5 × 45.0 cm |
| Management Interfaces | Console, USB, Management Ethernet |
| Layer Support | Layer 2 & Layer 3 |
Key Benefits
- High-speed fiber connectivity for data centers and backbone links
- Layer 3 routing capabilities for modern network architectures
- Stackable and scalable design with StackWise-480
- Secure networking with AES-256 MACsec encryption support
- Reliable enterprise performance with Cisco IOS XE
How to Install Cisco WS-C3850-12XS-S
Step-by-Step Installation Guide:
- Unbox & Inspect – Ensure switch, power cable, rack ears, and console cable are present.
- Rack Mounting – Install the switch into a standard 19-inch rack.
- Connect Power – Plug in AC power and power on the device.
- Console Access – Connect to the console port using a terminal app (e.g., PuTTY).
- Initial Configuration – Set hostname, IP address, and admin credentials.
- Connect Fiber – Insert SFP+ modules and connect fiber cables to upstream devices or servers.
- Configure VLANs & Routing – Create VLANs, trunk links, and routing protocols.
- Save Config – Save configuration with: write memory
Tip: Update to the latest IOS XE release before deploying for best performance.
Compatibility
The Cisco WS-C3850-12XS-S works with:
- Cisco Catalyst and Nexus switches
- 10G SFP+ fiber modules
- Enterprise routers and firewalls
- Network management systems (Cisco Prime, DNA Center)
- Servers, storage, and high-speed uplinks
Best Use Cases
- Data center access or aggregation layers
- High-speed fiber backbone links
- Enterprise campus networks
- Virtualized and converged infrastructures
- Secure, scalable Layer 3 environments
FAQ (Frequently Asked Questions)
Q1: Is the WS-C3850-12XS-S a Layer 3 switch?
Yes, it supports Layer 3 routing features with Cisco IOS XE IP Base.
Q2: What kind of ports does this switch have?
It has 12 x 10 Gigabit SFP+ fiber ports.
Q3: Can this switch be stacked?
Yes — it supports Cisco StackWise-480 for stacking up to 9 switches.
Q4: Is this suitable for data center use?
Yes — its 10G fiber ports and Layer 3 features make it ideal for data centers and high-speed environments.
Q5: Does it include a power supply?
Yes, it typically includes a 350W AC internal power supply.
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