Cisco Cisco C4Kx Nm 8Sfp Catalyst 4500X 8 Port 10G Network Module — Modular 10G Network Expansion (Cisco)

How Much Does Cisco C4KX-NM-8SFP+ Catalyst 4500X 8-Port 10G Network Module Cost in 2026?

As of June 2026, the Cisco C4KX-NM-8SFP+ typically ranges between $93 for a used, refurbished unit in condition grade B. Refurbishers like Axus Technology and Ferrotec commonly offer this part in the $90–$100 range, depending on the unit’s condition and service history. New units from Cisco or authorized resellers are significantly more expensive, often exceeding $230–$250, which means buyers can save between 40–60% by sourcing a used module.

The cost of failure here is non-trivial. If a network module fails in a live Catalyst 4500X switch, it can lead to downtime of 4–8 hours, costing an average enterprise $1,200–$2,500 in lost productivity and potential data loss. A used module with a service life of 5–7 years is typically acceptable, but units over 8 years old may have higher failure rates, especially if not properly recertified.

Refurbished units should be inspected for physical damage, firmware compatibility, and power-on test logs. Units with more than 15,000 operational hours are a red flag and should be avoided. Always request a full diagnostic report from the seller to ensure the unit is functional and free of latent defects.

Cisco C4KX-NM-8SFP+ Catalyst 4500X 8-Port 10G Network Module Specifications and Compatible Tools

The Cisco C4KX-NM-8SFP+ is an 8-port 10G network module designed for the Catalyst 4500X series switches. It supports SFP+ transceivers and typically operates with a maximum power draw of 12–15W. The module is commonly used in environments requiring high-speed Layer 2/3 switching and is rated for a service life of 5–7 years under normal operating conditions. It does not have a defined RF-hour metric but is generally rated for 100,000 operational cycles.

This module is compatible with Catalyst 4500X switches launched between 2012 and 2015, including the 4500X-48P and 4500X-48T models. However, it is not compatible with the newer Catalyst 9500 series or any switches that require a QSFP module. Attempting to install this module in an incompatible switch can lead to hardware failure and may void the system warranty.

Failure of this module can result in a complete loss of 10G connectivity on the affected ports, which in mission-critical environments can lead to downtime costing $1,000–$3,000 per hour. Always verify firmware compatibility and ensure the module is rated for the specific switch model before installation.

What to Check Before Buying a Used Cisco C4KX-NM-8SFP+ Catalyst 4500X 8-Port 10G Network Module in 2026

1. Service Life and Age: Units over 8 years old are high-risk. Look for modules produced between 2016 and 2019, as these are more likely to have been used in controlled environments.

2. Firmware Compatibility: Confirm the module’s firmware is compatible with your Catalyst 4500X switch model. Mismatches can cause boot failures or instability.

3. Power-On Hours: Units with more than 15,000 operational hours should be rejected. High usage correlates with increased failure rates.

4. Physical Inspection and Test Logs: Request a full diagnostic report. Look for signs of overheating, corrosion, or physical stress on the PCB. A failed loopback test is a hard reject.

5. Transceiver Support: Ensure the module supports the SFP+ transceivers you plan to use. Some older modules may not support newer transceiver models.

Buying a faulty module can lead to a complete port failure, requiring a costly replacement and potential downtime. Always insist on a 30-day return policy and a full diagnostic before finalizing the purchase.

FAQ

Q: Can I use the Cisco C4KX-NM-8SFP+ in a Catalyst 9500 switch?
A: No. The C4KX-NM-8SFP+ is not compatible with the Catalyst 9500 series. Attempting to install it can cause hardware failure and may void the warranty.

Q: Should I buy a used Cisco C4KX-NM-8SFP+ with over 10,000 power-on hours?
A: Yes, but only if it’s under 7 years old and has a full diagnostic report. Modules over 15,000 hours should be rejected due to increased failure risk.

Q: How long can I expect a used Cisco C4KX-NM-8SFP+ to last?
A: A well-maintained used module can last 3–5 more years in a controlled environment. Units over 8 years old are generally not recommended.

Q: What’s the difference between a used and a new Cisco C4KX-NM-8SFP+?
A: New units come with a 5-year warranty and full Cisco support. Used units typically cost 40–60% less but may have a 30-day return policy and no warranty.

Q: Can I use a third-party SFP+ transceiver with this module?
A: Yes, but only if the transceiver is MSA-compliant and compatible with the Catalyst 4500X. Non-compliant transceivers may cause instability or port failure.