Cisco 100BASE-FX SFP Module

The Cisco 100BASE-FX SFP Module is a hot-swappable transceiver that plugs into a Cisco Fast Ethernet port or slot, bridging your switch or router to a fiber network with ease. Engineered for reliability and seamless integration, this SFP module enables 100BASE-FX connectivity over ordinary multimode fiber (MMF) for distances up to 2 kilometers. It preserves the familiar Cisco management experience while giving you the flexibility to extend your campus or data-center network without a complete hardware overhaul. Whether you’re upgrading legacy copper infrastructure or deploying inter-site links, this SFP module delivers stable performance, simple deployment, and scalable growth for enterprise networks.

• The Cisco 100BASE-FX SFP Module enables Fast Ethernet transmission over multimode fiber, supporting link distances up to 2 kilometers. This makes it ideal for campus backbones, inter-building connections, and remote office links where fiber is preferred for reliability, immunity to electromagnetic interference, and cost-effective scalability.
• Hot-swappable design for minimal downtime. Install, replace, or upgrade SFP modules without powering down the device (subject to your equipment’s hot-swap policies). This capability helps maintain business continuity while expanding or reconfiguring your network, reducing maintenance windows and operational disruption.
• Compact, fiber-friendly form factor with a duplex LC connector. The LC duplex optical interface is the standard in modern Cisco deployments, enabling clean cable management and straightforward fiber provisioning. The module fits SFP ports across a broad family of Cisco switches and routers, providing flexible deployment options throughout your network.
• Designed for Cisco ecosystems with Cisco quality ID features that emphasize reliability and predictable behavior in production environments. By aligning with Cisco’s quality standards, this SFP module integrates smoothly with Cisco IOS management tools, monitoring features, and device provisioning workflows, helping you maintain consistent performance across your network.
• Versatile deployment and management support. This 100BASE-FX SFP module is compatible with standard 100 Mbps Fast Ethernet networks and works within Cisco’s managed networking environments. The module supports typical diagnostic indicators and management practices, enabling quick verification of link status and activity to keep your network up and running efficiently.

Technical Details of Cisco 100BASE-FX SFP Module

• Transceiver type: 100BASE-FX SFP module for Fast Ethernet networks
• Fiber type: Multimode fiber (MMF)
• Distance: Up to 2 kilometers (approx. 1.24 miles) over MMF
• Wavelength: 1310 nm typical
• Connector: Duplex LC
• Data rate: 100 Mbps (Fast Ethernet)
• Form factor: Small Form-factor Pluggable (SFP)
• Hot-swappable: Yes — designed for easy insertion and removal without powering down the device in compatible environments
• Standards compliance: IEEE 802.3u 100BASE-FX; designed for integration with Cisco switches and routers supporting SFP transceivers
• Compatibility: Built for Cisco Ethernet devices and broadly compatible with Cisco IOS management features and standard SFP-enabled ports on supported hardware

how to install Cisco 100BASE-FX SFP Module

Installing the Cisco 100BASE-FX SFP Module is a straightforward process designed to minimize downtime and maximize reliability. Follow these steps to ensure a proper, secure installation:

• Prepare the device: Confirm that the host Cisco switch or router supports SFP transceivers and that you have a clean, dust-free workspace. If your network policy allows hot-swapping, you can proceed with the device powered on; otherwise, follow your organization’s procedures to power down before installation.
• Remove the existing module (if upgrading): If you’re replacing an existing SFP, gently press the module’s latch to release it from the SFP port, then pull it straight out of the slot.
• Inspect and prepare the fiber: Verify that your multimode MMF fiber is clean, properly terminated, and equipped with a duplex LC connector. Ensure that the connector ferrules and end faces are free of dust and debris.
• Insert the SFP: Align the SFP module with the SFP port and insert it firmly until the latch engages with a solid click. Ensure the module is seated evenly and that the LED indicators (Link/Activity) are consistent with your device’s behavior.
• Connect the fiber cable: Attach the duplex MMF fiber with LC connectors to the module, taking care to align the transmit (TX) and receive (RX) directions. Avoid bending the fiber sharply and maintain the recommended bend radius to protect optical integrity.
• Verify link status: Power up the device (if not already powered) and check the switch or router’s management interface for an active link on the corresponding Fast Ethernet port. Confirm that the LED indicators reflect a healthy link and activity, and run any available diagnostics to verify performance.
• Finalize configuration: If your network employs VLANs, QoS, or port security policies, apply any necessary configuration to integrate the new link into your existing network design. Save the configuration and monitor the link over the next several hours to confirm stable operation.

Frequently asked questions

• Q: What is a 100BASE-FX SFP module and what does it do? A: A 100BASE-FX SFP module is a small form-factor transceiver that enables a Cisco switch or router to connect to a fiber network at 100 Mbps. It converts electrical signals to optical signals suitable for multimode fiber, allowing fast Ethernet connectivity over longer distances than copper cables.
• Q: What type of fiber and connector does this module use? A: This module uses multimode fiber (MMF) with a duplex LC optical connector. LC is the standard for modern SFP modules and supports reliable, high-density fiber connections in enterprise networks.
• Q: How far can I run a 100BASE-FX link with this SFP? A: The typical supported link distance for 100BASE-FX MMF installations with this type of module is up to 2 kilometers, depending on fiber quality, connector quality, and network environment. Always account for worst-case conditions when planning links.
• Q: Can I hot-swap the SFP module without powering down the device? A: Yes. SFP modules are designed to be hot-swappable on supported Cisco devices, allowing you to insert or remove the transceiver with the device powered on. Check your specific hardware’s documentation for any device-specific guidelines.
• Q: Is this module compatible with all Cisco switches and routers? A: The module is designed for use with Cisco devices that support SFP transceivers. Compatibility can vary by model and software version, so verify that your hardware supports 100BASE-FX SFPs and that you are using a Cisco-certified SFP for optimal performance.