Cisco WS-X4548-RJ45V+ Service Module

The Cisco WS-X4548-RJ45V+ Service Module is a high-density, copper-based Gigabit Ethernet line card designed for the Cisco Catalyst 4500E Series switches. Built to deliver scalable access-layer performance, this 48-port module provides robust, enterprise-grade connectivity with 10/100/1000BASE-T speeds, enabling organizations to efficiently support a large number of workstations, IP phones, and other network devices. With Cisco’s reputation for reliability and security, this service module is engineered to offer consistent performance, easy manageability, and seamless integration into existing Catalyst environments. It’s an ideal choice for enterprises seeking to maximize port density while preserving network intelligence and policy enforcement across the access layer.

• High-density 48-port Gigabit Ethernet — 48 x 10/100/1000BASE-T copper RJ-45 ports on a single module deliver expansive, cost-efficient access to user devices, printers, IP cameras, and other network endpoints, simplifying cable management and reducing switch fan-out requirements.
• Per-slot bandwidth of 48 Gbps with non-blocking data plane — Designed for the Cisco Catalyst 4500E Series, this module provides predictable, high-throughput performance across all ports, helping to minimize congestion during peak usage and ensuring consistent application response times.
• Integrated with Catalyst IOS features — The WS-X4548-RJ45V+ supports Cisco IOS-based management and policy features, including Quality of Service (QoS), access control lists (ACLs), VLAN segmentation, private VLANs, spanning-tree variants, and port security, enabling administrators to implement granular traffic control and secure network segmentation at the access layer.
• Hot-swappable and network-friendly — The module is designed for hot-swapping, allowing technicians to insert or replace the card without powering down the switch in most configurations. This minimizes downtime, preserves uptime for critical services, and supports rapid maintenance windows in busy data centers or enterprise networks.
• Future-ready integration with existing Catalyst infrastructure — The WS-X4548-RJ45V+ integrates smoothly with current Cisco Catalyst deployments, enabling seamless policy consistency, centralized management, and straightforward scalability as network demands grow or change over time.

Technical Details of Cisco WS-X4548-RJ45V+ Service Module

• Product family — Cisco Catalyst 4500E Series line card (service module) designed for high-density access.
• Ports — 48 x 10/100/1000BASE-T copper RJ-45 ports for flexible, standards-based Ethernet connectivity.
• Per-slot bandwidth — 48 Gbps per slot, aligning with the 47xx class of E-Series line cards for robust throughput in dense environments.
• Chassis compatibility — Requires a Cisco Catalyst 4500E Series switch chassis with a compatible supervisor and backplane to ensure proper operation and feature support.
• Form factor — Line-card service module designed to plug into the 4500E backplane, enabling modular scalability within the chassis.
• Management and features — Cisco IOS-based management with standard Catalyst features such as QoS, VLANs, ACLs, security, traffic shaping, and monitoring to provide comprehensive control and visibility over your access-layer network.
• Redundancy and reliability — Built to withstand enterprise workloads with hot-swappable capability and integration into redundant supervisor configurations, contributing to high availability for critical business operations.

How to install Cisco WS-X4548-RJ45V+ Service Module

To install the WS-X4548-RJ45V+ in a compatible Cisco Catalyst 4500E switch, follow these best-practice steps to minimize downtime and ensure proper operation:

• Confirm compatibility — Verify that your Catalyst 4500E model and current supervisor modules support the WS-X4548-RJ45V+. Check Cisco documentation for supported chassis and IOS versions to ensure feature compatibility and safe operation.
• Prepare for insertion — If your maintenance policy allows, you may perform a hot-swap. Gather the appropriate tools and labeling for cables to minimize mix-ups. Have spare RJ-45 cables ready for port re-cabling after installation.
• Power and safety — For hot-swappable installation, ensure you follow your organization’s safety procedures. If power-down is required by policy, perform a controlled shutdown of the switch, then proceed with confidence once the system is powered back up.
• Seat the module — Align the WS-X4548-RJ45V+ with the vacant line-card slot in the Catalyst 4500E backplane. Gently slide the module into the slot until it seats fully, then engage the card’s locking mechanism to secure it in place.
• Verify electrical and link status — After insertion, inspect the module LEDs for status indicators. The power, fault, and activity LEDs should reflect normal operation per Cisco guidelines. If any LED shows an abnormal state, reseat the module or consult the switch’s management interface for diagnostics.
• Configure in IOS — Access the switch via console or management network, then verify recognition with commands such as show module or show inventory. Configure VLANs, QoS policies, and port settings to align with your network design. Test connectivity across several ports to confirm that all 48 ports are operational and reachable.
• Integrate with monitoring — Use standard Catalyst monitoring tools to track port utilization, error rates, and health status. Set up alerts for abnormal port errors or link flaps to maintain visibility and proactive maintenance.

Frequently asked questions

• What is the primary function of the Cisco WS-X4548-RJ45V+ Service Module? It provides a dense set of 48 Gigabit Ethernet copper ports (10/100/1000BASE-T) to extend access-layer connectivity on Cisco Catalyst 4500E switches, enabling scalable, centralized management of user devices and IP-enabled endpoints.
• Is this module hot-swappable? Yes. The WS-X4548-RJ45V+ is designed for hot-swapping, allowing installation or replacement without powering down the entire switch in many configurations. Always follow Cisco guidelines and your maintenance policy.
• Which chassis and supervisor requirements apply? This module is intended for Cisco Catalyst 4500E Series switches and requires a compatible supervisor and backplane to support the line card operation and feature set. Verify IOS compatibility and slot availability before installation.
• What features does it support besides basic connectivity? Beyond port replication, the module supports Catalyst features such as QoS for traffic prioritization, VLAN segmentation, ACLs for security, spanning-tree enhancements for loop prevention, and port-level monitoring to provide visibility into traffic patterns and performance.
• Can I use this module with older Catalyst models? The WS-X4548-RJ45V+ is designed for the Catalyst 4500E Series. While some older models may support similar line cards, compatibility depends on the switch chassis, supervisor software, and backplane. Always consult Cisco documentation and the product's specification notes for compatibility guidance.
• What kind of throughput should I expect with 48 ports? The per-slot bandwidth is 48 Gbps, with a non-blocking data plane designed to handle simultaneous uplink and access-port traffic efficiently. This enables dense user environments to experience consistent application performance under typical enterprise load patterns.
• Do I need any special cables or uplinks? The 48 ports are copper RJ-45 Ethernet interfaces. Standard Ethernet cables (Cat5e/Cat6) are suitable for 1 Gbps connections, with appropriate consideration for cable length and cable quality to maintain performance and reliability.
• How do I monitor and manage this module? Use Cisco IOS-based management tools and Catalyst management software to monitor port status, traffic, errors, and health. Commands such as show module, show interfaces status, and show inventory help administrators verify operation and performance.
• What is the upgrade path if I outgrow this module? The Catalyst 4500E chassis supports modular growth; you can add additional line cards or upgrade switch supervision to scale port density and feature support as network demands evolve. Plan for capacity, power, and cooling considerations when expanding.
• Are there security considerations with this module? Yes. The module supports ACLs, QoS policies, and VLAN segmentation, enabling you to enforce security policies at the access layer. Regular firmware and IOS updates, along with proper segmentation and monitoring, help maintain a secure network posture.