Cisco 48-Port 100BASE-FX Fast Ethernet Line Card

The Cisco 48-Port 100BASE-FX Fast Ethernet Line Card is a high-density, fiber-based solution engineered for the demanding environments found in modern networks. Designed for the Cisco Catalyst 4500 Series with EFM (Ethernet in the First Mile) capabilities, this line card delivers reliable, scalable Fast Ethernet access across your edge and distribution layers. It is especially well-suited for facilities where electromagnetic interference is a concern, as the Ethernet over fiber design provides superior immunity to noise, improves security through physical isolation, and extends reach beyond copper-based networks. Ideal for manufacturing facilities, transportation monitoring, and fiber-to-the-desk deployments, this module enables robust connectivity without compromising on performance or manageability.

• High-density port footprint: 48 x 100BASE-FX Fast Ethernet fiber ports on a single Catalyst 4500 Series line card, delivering dense, cost-efficient per-port connectivity and reducing chassis floor space while expanding your network’s access capabilities.
• Fiber-based reliability and long reach: Ethernet over fiber enables operation in electrically noisy environments and offers longer reach than copper. Each 100BASE-FX port supports reliable data transport over standard MMF fiber, delivering distances up to 2 kilometers on typical multimode installations, which is ideal for campus cores, factory floors, and remote edge deployments.
• Targeted deployment scenarios: Perfect for manufacturing facilities that demand clean signals in harsh electrical environments, transportation monitoring systems that require secure and resilient links, and fiber-to-the-desk configurations that unify dispersed workspaces with centralized management. The line card’s fiber architecture helps preserve signal integrity across challenging industrial settings while maintaining enterprise-grade performance.
• Advanced traffic and security features: Built to integrate with Cisco’s robust Layer 2 capabilities, including VLAN segmentation, QoS for traffic prioritization, broadcast storm control, and standard security mechanisms. This enables you to create scalable, secure networks that meet modern compliance and performance requirements without compromising on ease of administration.
• Flexible maintenance and deployment: Hot-swappable in a compatible Catalyst 4500 chassis, with no separate power requirement for the card itself and seamless integration with the chassis backplane. This design supports streamlined field upgrades, easy scalability, and high-availability configurations when paired with redundant supervisors and power architectures.

Technical Details of Cisco 48-Port 100BASE-FX Fast Ethernet Line Card

• Part of the Cisco Catalyst 4500 Series EFM (Ethernet in the First Mile) family of line cards
• Ports: 48 x 100BASE-FX Fast Ethernet fiber interfaces
• Interface type: Fiber-optic 100BASE-FX, optimized for multimode fiber installations
• Distance capability: Up to approximately 2 kilometers on standard multimode fiber (MMF) under typical conditions
• Wavelength: 1310 nm (typical for 100BASE-FX implementations in fiber networks)
• Chassis compatibility: Catalyst 4500 Series chassis with appropriate EFM slot support
• Power: Powered via chassis backplane; no separate power supply required for the line card
• Management: Cisco IOS-based management through standard CLI, SNMP, and compatible network management tools
• Redundancy and availability: Supports hot-swapping within a live chassis; compatible with high-availability configurations when used with redundant supervisors and properly configured backplane resources
• Security and QoS: Integrated Layer 2 features including VLANs, QoS (priority queuing and traffic shaping), and standard security measures for access control and traffic isolation

How to install Cisco 48-Port 100BASE-FX Fast Ethernet Line Card

• Prerequisites: Verify that your Cisco Catalyst 4500 Series chassis supports EFM line cards and has a spare slot available. Ensure the chassis is running a compatible IOS image and that a suitable supervisor engine is installed to manage the new line card. Review your network design to plan VLANs and QoS policies in advance.
• Prepare the workspace: Power down is not always required for hot-swappable line cards, but follow your facility’s maintenance procedures. Ground yourself to prevent static discharge and organize fiber cables to avoid strain on connectors during installation.
• Remove the blank module: If a blank filler module occupies the target slot, remove it carefully to expose the slot interface. Inspect the slot for any debris before inserting the new line card.
• Insert the line card: Align the line card with the slot guides and firmly seat it into the chassis backplane. Push until it is fully seated and secure the card with any retention hardware provided by the chassis (screw or latch, depending on your model).
• Connect fiber cables: Attach each 100BASE-FX fiber cable to the corresponding ports on the line card. Use the appropriate fiber connectors (as specified by your fiber infrastructure) and ensure proper orientation of transmit/receive pathways if required by your installation. Label cables to simplify future maintenance.
• Power up and verify: If the chassis supports hot-swapping, resume operation and power on as per your standard procedure. Use show commands (for example, show module, show inventory, show interface status) to verify that the line card is recognized and that all ports are functional. Check port LEDs to confirm link activity and activity on individual ports.
• Configure networking policies: Access the Cisco IOS CLI to assign VLANs, configure trunking, enable QoS policies, and enforce security settings. Establish port-channel configurations if needed and set up management access controls. Validate connectivity across the 48 ports by testing traffic from end devices or through a controlled test host.
• Testing and validation: Perform end-to-end tests to confirm bandwidth, latency, and error rates. Verify that broadcast and multicast handling aligns with your network design. Confirm that security features such as ACLs and authenticated management access function as intended. Document configuration and keep a backup of the running configuration for disaster recovery.

Frequently asked questions

• What is the primary benefit of a 48-port 100BASE-FX line card? It provides dense fiber-based Fast Ethernet access within a single Cisco Catalyst 4500 Series line card, enabling scalable, EMI-resistant connections with long reach suitable for industrial or campus environments.
• What environments are best suited for this line card? Environments with high electrical noise, long-run fiber requirements, and the need to connect many edge devices or workstations—such as manufacturing floors, transportation hubs, and fiber-to-the-desk deployments—benefit most from this module.
• Is the line card hot-swappable? Yes. The line card is designed to be hot-swappable within a compatible Cisco Catalyst 4500 chassis, allowing maintenance and upgrades without powering down the entire system.
• What management capabilities are included? The line card supports common Cisco IOS-based management, including CLI access, SNMP monitoring, and integration with standard network management tools for configuration, monitoring, and troubleshooting.
• What other components are needed for full functionality? A compatible Catalyst 4500 Series chassis, an appropriate supervisor engine, and a supported IOS image are required to harness the full capabilities of the 48-port 100BASE-FX line card. Adequate fiber infrastructure and the proper fiber connectors are also necessary for physical deployment.
• Can I mix this with copper-based ports on the same switch? Yes, within the Catalyst 4500 environment, you can mix fiber-based 100BASE-FX line cards with copper-based interfaces to create a blended access network, provided the chassis and software configuration support the desired topology and QoS rules.
• What are typical distance limitations? For 100BASE-FX fiber, you can expect up to roughly 2 kilometers of multimode fiber under standard conditions, depending on fiber grade, connectors, and installation quality. Always refer to your fiber specifications and installation guidelines for exact distances.
• Are there any notable maintenance considerations? Regularly inspect fiber connections for contamination, verify link status via management interfaces, and keep firmware/software up to date to ensure compatibility with evolving network policies and security requirements.