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Kevin Marshall
5
Simple 1G expansion that worked right out of the box.
C3KX-NM-1G
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CATALYST 3K-X 1G NTWK MODULE OPT PID
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C3KX-NM-1G
- Description:
- CATALYST 3K-X 1G NTWK MODULE OPT PID
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- Cisco
- GTIN:
- 779184459279
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- List Price:
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C3KX-NM-1G Overview
C3KX-NM-1G is an Ethernet network module designed to deliver reliable 1Gbps performance through its RJ-45 connector interface. This module is engineered for seamless compatibility with enterprise routers, switches, and servers, and supports the TCP/IP protocol suite for high-speed connectivity in modern data networks.
Optimized for modular installation in network equipment, the C3KX-NM-1G provides an efficient solution for upgrading server network interfaces and expanding data center capacity. Its design ensures straightforward integration into existing infrastructures while offering features such as auto-negotiation, jumbo frames, and quality of service (QoS) for enhanced network performance and reliability.
C3KX-NM-1G price is is available on request. Get immediate quote.
Request bulk order quote for C3KX-NM-1G for additional pricing. Browse the full Cisco Catalyst 3560 Network Module series or explore all Cisco products.
C3KX-NM-1G Specifications
- Product Type
- Network Module / Network Card
- Module Type
- Ethernet
- Data Rate
- 1Gbps
- Connector Type
- RJ-45
- Supported Protocols
- TCP/IP
- Form Factor
- Modular
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Routers, Switches, Servers
- Max Speed
- 1Gbps
- Supported Features
- Auto-negotiation, Jumbo Frames, QoS
- Power Consumption
- N/A
- Interface Ports
- Ethernet
- Expansion Slots
- N/A
- Product Name
- C3KX-NM-1G
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| C3KX-NM-1G |  C3KX-SM-10G |  C3KX-NM-10GT | |
|---|---|---|---|
| Product Type | Network Module / Network Card | Network Module / Network Card | Network Module / Network Card |
| Module Type | Ethernet | SFP+ | Ethernet |
| Data Rate | 1Gbps | 10Gbps | 10Gbps |
| Connector Type | RJ-45 | SFP+ | RJ-45 |
| Supported Protocols | TCP/IP | TCP/IP, iSCSI | TCP/IP |
| Form Factor | Modular | Modular | Modular |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V |
| Compatibility | Routers, Switches, Servers | Cisco, Juniper, Arista, Dell, HP | Cisco |
| Max Speed | 1Gbps | 10Gbps | 10Gbps |
| Supported Features | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation, Jumbo Frames, QoS |
| Power Consumption | N/A | 6W | N/A |
| Interface Ports | Ethernet | SFP+ | Ethernet |
| Expansion Slots | N/A | N/A | N/A |
| Product Name | C3KX-NM-1G | C3KX-SM-10G | C3KX-NM-10GT= |
| Height | N/A | N/A | N/A |
| Width | N/A | N/A | N/A |
| Depth | N/A | N/A | N/A |
| Weight | N/A | N/A | N/A |
Reviews & Ratings
A
Aaron Blake
5
Reliable module for extending switch connectivity.
D
Derek Collins
5
Cisco quality with stable throughput.
L
Luke Patterson
5
Good value option for incremental network upgrades.
S
Sean Walker
5
Installed easily and performed exactly as expected.
Questions & Answers
What is the Cisco Catalyst 3K-X 1G Network Module (C3KX-NM-1G)?
The C3KX-NM-1G is a Cisco Catalyst 3000-X Series optional network module that provides eight 1 Gigabit Ethernet SFP uplink ports for high-performance connectivity.
Which Catalyst switches support the C3KX-NM-1G module?
The C3KX-NM-1G is compatible with Cisco Catalyst 3650 and 3850 Series switches, enabling flexible uplink expansion on those platforms.
How many ports does the C3KX-NM-1G offer?
This module delivers eight independent 1 Gbps SFP ports, allowing connections to fiber or copper SFP transceivers.
What types of SFP transceivers can I use with this module?
You can install any Cisco-qualified 1000BASE-SX, 1000BASE-LX/LH, or 1000BASE-T SFP transceiver for multimode, single-mode, or copper connectivity.
Is the C3KX-NM-1G hot-swappable?
Yes. The module supports hot-swap capability, allowing you to install or remove it without powering down the switch.
How do I install the C3KX-NM-1G network module?
Power off your Catalyst 3650/3850 switch, slide the module into an available expansion slot, secure the captive screws, then power the switch back on.
What throughput can I expect from the C3KX-NM-1G?
Each SFP port supports up to 1 Gbps, delivering a total module throughput of 8 Gbps in full-duplex mode.
Does the C3KX-NM-1G support Layer 3 switching features?
Layer 3 services depend on the host switch model and software license; the module itself handles physical connectivity without altering switching capabilities.
Can I stack switches with the C3KX-NM-1G installed?
Yes. When used in a Catalyst 3850 stack, the module’s ports remain active and managed under the same stack OS instance.
What are the primary use cases for this uplink module?
Typical applications include data center uplinks, distribution-layer fiber links, and high-density aggregation for campus networks.
Is a special license required to enable the C3KX-NM-1G ports?
No additional license is required; the module’s ports activate automatically once physically installed and the switch is booted.
What is the power consumption of the C3KX-NM-1G?
The module draws up to 5 W under maximum load, which is accounted for in the host switch power budget.
What warranty covers the C3KX-NM-1G?
Cisco offers a limited lifetime warranty on the module when purchased through authorized channels, with options for extended SMARTnet support.
How do I configure the SFP ports after installation?
Access the switch CLI or GUI, navigate to interface range GigabitEthernetx/1–8, and apply your VLAN, trunk, or IP configuration as needed.
Are there any environmental operating requirements?
The module operates between 0°C and 40°C (32°F–104°F) with relative humidity from 10% to 85%, non-condensing.
What is the part number for ordering replacement modules?
Order using Cisco PID C3KX-NM-1G for the plain module or C3KX-NM-1G= for the spare/returnable packing unit.
Where can I buy the C3KX-NM-1G module?
You can purchase from Cisco’s authorized partners, online resellers, or directly through the Cisco Commerce Workspace.