? Message us on In modern enterprise networks, high-speed data transfer and scalability are no longer luxuries—they’re necessities. As organizations expand their infrastructure and user demands grow, networking hardware must deliver exceptional throughput, flexibility, and reliability. The Cisco C3850-NM-2-10G network module is designed to meet these exact needs. Built specifically for Cisco Catalyst 3850 series switches, this module provides advanced 10 Gigabit Ethernet uplink capabilities that empower businesses to handle heavy traffic loads while ensuring future-proof connectivity. Whether in a corporate campus, a data center, or a high-performance branch office, this network module plays a key role in maintaining fast, stable, and secure communications.
Cisco C3850-NM-2-10G Network Module : High-Speed Connectivity for Demanding Networks
The C3850-NM-2-10G is a hot-swappable network module that adds two high-speed 10G SFP+ uplink ports to compatible Cisco Catalyst 3850 switches. It is engineered to deliver seamless integration with the switch hardware and software, ensuring that administrators can easily expand uplink capacity without major configuration overhauls. Supporting both 1G and 10G fiber connections, the module offers unmatched flexibility for diverse network designs.
Physically, the module features a compact, durable design that slides into the network module slot of the switch, locking securely into place. This plug-and-play nature reduces downtime during installation or upgrades, allowing IT teams to deploy it quickly in production environments. Because it supports hot-swapping, the C3850-NM-2-10G can be replaced or upgraded without shutting down the switch, minimizing operational disruption.
In terms of compatibility, this module is designed for use with Cisco Catalyst 3850 series switches running specific IOS versions that support the hardware. It integrates seamlessly with Cisco’s unified access architecture, enabling features like advanced QoS, flexible NetFlow, and Layer 3 routing over high-bandwidth uplinks.
Applications of the C3850-NM-2-10G
The C3850-NM-2-10G is ideal for multiple real-world scenarios, including:
- Campus Core and Distribution Layers: Providing high-speed uplinks between access switches and core routers.
- Data Center Connectivity: Linking top-of-rack switches to aggregation layers with 10G fiber connections.
- WAN Edge Deployments: Supporting high-bandwidth connections for branch offices with minimal latency.
- Network Segmentation and Redundancy: Creating redundant high-speed paths to improve network resilience.
Because it supports both 1G and 10G SFP/SFP+ transceivers, it adapts to various network speeds, making it a future-ready choice for organizations planning phased upgrades.
Port Details
The C3850-NM-2-10G features two SFP/SFP+ uplink ports:
- SFP Mode: Supports 1 Gigabit Ethernet SFP modules for legacy connections.
- SFP+ Mode: Supports 10 Gigabit Ethernet SFP+ modules for high-speed backbones.
Each port is individually configurable, allowing a mix of 1G and 10G connections based on deployment needs. This versatility is especially valuable in mixed-environment networks transitioning from 1G to 10G speeds.
The ports support a variety of Cisco-approved optical transceivers and DAC (Direct Attach Copper) cables, enabling flexible fiber or copper deployments over different distances and environments.
Build Quality and Reliability
Cisco’s hardware reputation is built on engineering excellence, and the C3850-NM-2-10G upholds this standard. The module is encased in a robust metallic housing for durability and efficient heat dissipation. The connectors are gold-plated to prevent corrosion and ensure stable signal transmission. Internal components are engineered for continuous operation in demanding enterprise environments, with rigorous testing for temperature, vibration, and electromagnetic interference.
Additionally, Cisco’s advanced error detection and correction mechanisms help maintain consistent performance even under heavy traffic loads. Combined with the Catalyst 3850’s redundancy features, the C3850-NM-2-10G offers outstanding reliability for mission-critical networks.
Scaling from 1G to 10G Without Disruption
One of the most significant advantages of the C3850-NM-2-10G is its ability to bridge the gap between legacy and next-generation networking. Many organizations still operate on 1G backbones but are preparing to transition to 10G. This module allows IT teams to deploy 1G uplinks today and switch to 10G in the future—without replacing the hardware. This approach protects investment and reduces upgrade costs.
Maximizing Redundancy for High Availability
By installing two C3850-NM-2-10G modules in a stack of Catalyst 3850 switches, businesses can create multiple high-speed uplink paths to different core switches. This redundancy ensures that if one uplink fails, the other maintains network connectivity, a vital feature for environments that require continuous uptime.
Comparison with Similar Cisco Modules
| Feature | C3850-NM-2-10G | C3850-NM-4-10G | C3850-NM-2-40G |
|---|---|---|---|
| Uplink Ports | 2 x 1G/10G SFP/SFP+ | 4 x 1G/10G SFP/SFP+ | 2 x 40G QSFP+ |
| Speed Support | 1G / 10G | 1G / 10G | 40G |
| Ideal For | Medium to large networks | High-density aggregation | Ultra-high bandwidth environments |
| Power Consumption | Low | Moderate | Higher |
| Hot-Swappable | Yes | Yes | Yes |
| Compatibility | Catalyst 3850 Series | Catalyst 3850 Series | Catalyst 3850 Series |
Technical Specifications – Cisco C3850-NM-2-10G
| Specification | Details |
|---|---|
| Model | C3850-NM-2-10G |
| Form Factor | Hot-swappable network module |
| Uplink Ports | 2 x SFP/SFP+ |
| Supported Speeds | 1G / 10G |
| Compatibility | Cisco Catalyst 3850 Series |
| Supported Transceivers | Cisco SFP & SFP+ modules, DAC cables |
| Power Consumption | <5W |
| Operating Temperature | 0°C to 40°C |
| Dimensions | 3.5 x 4.5 x 1.2 inches (approx.) |
| Weight | ~0.25 kg |
| Installation | Tool-less slide-in |
| Hot Swap Support | Yes |
FAQ – Cisco C3850-NM-2-10G
- What switches support the C3850-NM-2-10G?
It is compatible with Cisco Catalyst 3850 series switches. - Can I use both 1G and 10G modules at the same time?
Yes, the ports support mixed configurations. - Is it hot-swappable?
Yes, you can install or remove it without powering down the switch. - Which transceivers are compatible?
It supports Cisco-certified SFP and SFP+ transceivers, as well as DAC cables. - Does it require a specific IOS version?
Yes, ensure your switch runs a supported IOS version for full functionality. - What’s the maximum data throughput?
20Gbps aggregate (10Gbps per port). - Can it be used in a stack configuration?
Yes, uplinks work across stacked Catalyst 3850 switches. - Does it support fiber and copper uplinks?
Yes, depending on the transceiver used. - What is the expected lifespan?
With proper care, it can operate reliably for many years in enterprise environments.
Conclusion
The Cisco C3850-NM-2-10G network module is a versatile, high-performance upgrade for Catalyst 3850 series switches, offering organizations the ability to handle modern bandwidth demands while preparing for future growth. With dual SFP/SFP+ ports, robust build quality, and flexible speed support, it is the ideal choice for enterprise environments that value performance, reliability, and scalability. For businesses looking to enhance their network backbone without a complete infrastructure overhaul, the C3850-NM-2-10G delivers exceptional value.
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