United States$5,000,000+
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C
Colin Mercer
4
Added extra gigabit uplinks easily.
C3850-NM-4-1G
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CATALYST 3850 4X1GE NETWORK MODULE
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Name:
C3850-NM-4-1G
- Description:
- CATALYST 3850 4X1GE NETWORK MODULE
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 818250252380
- Condition:
- Warranty:
- 3
- List Price:
$925.00
- Price:
$197.0078.7% off
Quantity:
1
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C3850-NM-4-1G Overview
C3850-NM-4-1G is a dedicated network module designed specifically for the Cisco Catalyst 3850 Series switches. This module provides four 1-Gigabit Ethernet ports with RJ-45 connectors, offering reliable, high-speed connectivity for expanding network capacity in enterprise and data center environments. Built to support standard TCP/IP protocols, it delivers the essential performance needed for mission-critical network applications.
Engineered with a modular form factor, the C3850-NM-4-1G integrates seamlessly into compatible Cisco platforms, enabling streamlined installation and upgrade pathways. Its 1Gbps data rate and industry-standard features like auto-negotiation and jumbo frame support make it an ideal choice for organizations looking to enhance connectivity without compromising system stability or performance.
C3850-NM-4-1G price is $197.00, a 78.7% saving from the Cisco list price of $925.00. C3850-NM-4-1G is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C3850-NM-4-1G for additional pricing. Browse the full Cisco Catalyst 3850 Network Module series or explore all Cisco products.
C3850-NM-4-1G Specifications
- Product Type
- Network Module
- Module Type
- Network Module
- Data Rate
- 1Gbps
- Connector Type
- RJ-45
- Supported Protocols
- TCP/IP
- Form Factor
- Modular
- Operating Temperature
- 0 to 45°C
- Storage Temperature
- N/A
- Input Voltage
- N/A
- Compatibility
- Cisco Catalyst 3850 Series Switches
- Max Speed
- 1Gbps
- Supported Features
- Auto-negotiation, Jumbo Frames
- Power Consumption
- N/A
- Interface Ports
- Ethernet
- Expansion Slots
- N/A
- Product Name
- Cisco Catalyst 3850 4-port 1-Gigabit Ethernet Network Module
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
C3850-NM-4-1G Use Case
Enterprise Campus Uplink Aggregation with C3850-NM-4-1G
In a large corporate campus environment, the IT team installs the C3850-NM-4-1G 4X1GE Network Module on Catalyst 3850 aggregation switches to provision four dedicated 1 Gigabit fiber uplinks into the distribution layer. This scalable uplink configuration delivers 4 Gbps of redundant bandwidth with link aggregation, ensuring seamless campus-wide connectivity, minimized latency and non-disruptive capacity expansion.
Branch Office Converged Voice & Data Infrastructure
A multi-site retail chain integrates the C3850-NM-4-1G module into its Catalyst 3850 stackable switches to converge VoIP, POS and guest-Wi-Fi traffic over four separate 1 Gigabit uplinks to the MPLS WAN. This converged design simplifies management through a single control plane, enforces QoS policies for crystal-clear voice calls and achieves link redundancy for up to 99.99% uptime.
Industrial IoT Edge Segmentation and Security
In a smart manufacturing facility, network engineers deploy the C3850-NM-4-1G on Catalyst 3850 edge switches to isolate high-density IoT sensors from corporate IT traffic via four independent 1 Gigabit fiber connections to the core. This segmented topology enforces TrustSec policies at the edge, delivers predictable performance for real-time telemetry and strengthens security posture against lateral threats.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| C3850-NM-4-1G |  C3850-NM-8-10G |  C3850-NM-2-10G |  C3850-NM-4-10G | |
|---|---|---|---|---|
| Product Type | Network Module | Network Module / Network Card | Network Module | Network Module / Network Card |
| Module Type | Network Module | SFP+ | Ethernet | Network Module |
| Data Rate | 1Gbps | 10Gbps | 10Gbps | 10Gbps |
| Connector Type | RJ-45 | SFP+ | SFP+ | SFP+ |
| Supported Protocols | TCP/IP | TCP/IP | TCP/IP | TCP/IP |
| Form Factor | Modular | Modular | Modular | Modular |
| Operating Temperature | 0 to 45°C | 0 to 50°C | 0 to 50°C | 0 to 50°C |
| Storage Temperature | N/A | -40 to 70°C | N/A | -40 to 70°C |
| Input Voltage | N/A | 3.3V | N/A | N/A |
| Compatibility | Cisco Catalyst 3850 Series Switches | Cisco | Cisco Catalyst 3850 Series | Cisco |
| Max Speed | 1Gbps | 10Gbps | 10Gbps | 10Gbps |
| Supported Features | Auto-negotiation, Jumbo Frames | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation / Jumbo Frames / QoS |
| Power Consumption | N/A | N/A | N/A | N/A |
| Interface Ports | Ethernet | SFP+ | SFP+ | SFP+ |
| Expansion Slots | N/A | N/A | NIM | N/A |
| Product Name | Cisco Catalyst 3850 4-port 1-Gigabit Ethernet Network Module | Cisco Catalyst 3850 Network Module 8x10G (C3850-NM-8-10G) | Cisco Catalyst 3850 C3850-NM-2-10G Network Module | Cisco C3850-NM-4-10G |
| Height | N/A | N/A | N/A | N/A |
| Width | N/A | N/A | N/A | N/A |
| Depth | N/A | N/A | N/A | N/A |
| Weight | N/A | N/A | N/A | N/A |
Reviews & Ratings
M
Mishal Khan
4
Plug and play installation.
D
Diego Alvarez
5
Stable connectivity.
Y
Yasir Amin
5
Good expansion option.
A
Angela Boyd
5
Works as expected.
Questions & Answers
What is the Cisco Catalyst 3850 4x1GE Network Module (SKU: C3850-NM-4-1G)?
The Cisco Catalyst 3850 4x1GE Network Module (SKU: C3850-NM-4-1G) is a high-performance uplink module that adds four 1 Gigabit Ethernet SFP ports to Catalyst 3850 Series switches.
Which Catalyst 3850 switches support the C3850-NM-4-1G module?
The C3850-NM-4-1G module is supported in all Cisco Catalyst 3850 24-port and 48-port fixed-configuration switches with modular uplink bays.
How many Ethernet ports does the Catalyst 3850 4x1GE Network Module provide?
The Catalyst 3850 4x1GE Network Module provides four 1 Gigabit Ethernet SFP uplink ports for fiber or copper connectivity.
Which SFP transceivers are compatible with the C3850-NM-4-1G module?
The module is compatible with Cisco SFP transceivers such as GLC-SX-MMD, GLC-LH-SMD, GLC-TE, and third-party MSA-compliant SFPs.
Can I stack Catalyst 3850 switches when the 4x1GE module is installed?
Yes, the C3850-NM-4-1G module does not affect StackWise-480 functionality; you can stack up to nine Catalyst 3850 switches.
What is the maximum forwarding capacity of the 4x1GE network module?
The module delivers line-rate forwarding of up to 4 Gbps aggregate across all four 1 Gigabit SFP ports.
Does the Catalyst 3850 4x1GE module support PoE or PoE+?
No, the C3850-NM-4-1G is an uplink-only network module and does not provide Power over Ethernet (PoE) or PoE+ on its ports.
How do I install the Cisco C3850-NM-4-1G module into my switch?
To install, power off the switch (optional for hot-swap), insert the module into an uplink bay until it clicks, secure the captive screw, then power on and verify with the show module command.
Which Cisco IOS XE software version is required for the 4x1GE network module?
The C3850-NM-4-1G module requires Cisco IOS XE 16.3.x or later to ensure full feature support and stability.
Is hot-swapping supported for the Catalyst 3850 4x1GE module?
Yes, the module supports hot-swappable insertion and removal without disrupting data traffic on other ports.
What warranty and support options are available for the C3850-NM-4-1G?
Cisco offers a limited lifetime hardware warranty and optional SMARTnet Service for software updates, 24/7 technical support, and hardware replacement.
How can I troubleshoot link issues on the 4x1GE network module ports?
Use the show interfaces status and show logging commands to verify SFP status, check compatibility, reseat modules, and upgrade to the latest IOS XE release.
What are the environmental specifications of the Catalyst 3850 4x1GE module?
Operating temperature ranges from 0 °C to 45 °C, relative humidity from 10 % to 90 % non-condensing, and altitude up to 3,000 m.
Does the C3850-NM-4-1G module support both Layer 2 and Layer 3 features?
Yes, the module transparently forwards Layer 2 and Layer 3 traffic, leveraging the Catalyst 3850 switch’s full feature set.
Can I mix the 4x1GE module with other uplink modules in the same switch?
Yes, you can mix C3850-NM-4-1G with other Cisco uplink modules as long as the total slot configuration is supported by your switch model.
What is the typical power consumption of the C3850-NM-4-1G network module?
The typical power consumption of the Catalyst 3850 4x1GE Network Module is approximately 3 watts under normal operating conditions.