Extreme Networks 5520 48-Port Switch: 10/100/1000BASE-T, MACsec, Stacking, and QSFP28 Uplink

Engineered for enterprise campus networks, the Extreme Networks 5520 48-port switch provides dense, reliable access-layer connectivity with flexible uplink options and robust security. Featuring 48 fixed 10/100/1000BASE-T ports, two dedicated stacking ports, and a single QSFP28 uplink, this device is built to scale with growing traffic demands while delivering consistent performance, security, and ease of management. With MACsec capability, full-duplex operation, and a suite of enterprise-grade features, it’s designed to simplify network segmentation, policy enforcement, and trusted data transmission across the environment.

• 48 x 10/100/1000BASE-T ports deliver flexible, cost-efficient access connectivity for users, devices, and endpoints across campus and branch networks, with reliable full-duplex operation to maximize throughput and minimize latency.
• MACsec capable security ensures encrypted data-in-transit on wired links, protecting sensitive information as it traverses the network and helping meet compliance and risk-reduction requirements.
• Two dedicated stacking ports enable scalable growth by linking multiple switches into a single, manageable system, simplifying configuration, broadcast domain control, and policy consistency across the stack.
• 1 QSFP28 uplink port provides a high-bandwidth connection to the core or aggregation layer, enabling future-proof 40Gbps-class connectivity and flexible integration with fiber-based backbone infrastructure.
• Enterprise-grade performance and management backed by Extreme Networks’ operating system and tools, delivering policy-driven automation, monitoring, and secure remote management for large-scale deployments.

Technical Details of Extreme Networks 5520

• Ports: 48 x 10/100/1000BASE-T ports; 2 x stacking ports; 1 x QSFP28 uplink port for high-speed core connections.
• Stacking: Supports stacking to form a single, manageable unit across multiple switches, reducing administrative overhead and enabling centralized policy enforcement.
• Uplink: 1 x QSFP28 port to connect to core, distribution, or data-center switching fabrics, supporting high-bandwidth aggregation as networks scale.
• Security: MACsec-capable hardware that can be deployed on appropriate links to protect data in transit and strengthen network security posture.
• Duplex and port behavior: Ports support full-duplex (FDX) operation to optimize performance and minimize collisions in busy environments, with flexible negotiation for diverse device types.
• Operating system and management: Runs the Extreme Networks operating environment with familiar management interfaces, including CLI, GUI, and API access for automation, monitoring, and policy control.

how to install Extreme Networks 5520

Setting up the Extreme Networks 5520 involves careful planning, rack installation, cabling, and initial configuration to ensure a stable, secure network foundation. Begin by mapping the physical layout, ensuring adequate airflow, power redundancy, and accessible cabling routes. The device is designed for standard 19-inch rack mounting and typically occupies 1U of vertical space, but verify exact dimensions against your product documentation.

Step 1: Unpack and verify. Confirm all components are present, including the switch, rack-mount hardware, power cords, and any stacking cables required for your planned topology. Inspect the unit for any shipping damage and consult the included guide for wiring and configuration notes.

Step 2: Rack mounting. Install the switch securely in the rack using the supplied mounting brackets and screws. Plan cable routing to minimize bending and to keep airflow unobstructed. Label ports and stacking connections to simplify future maintenance and troubleshooting.

Step 3: Power-up and initial access. Connect the power supply to a stable power source and boot the device. Access the management interface via console, a dedicated management port, or a preconfigured IP address if your network already provides one. Ensure the device reaches a healthy state indicated by the status LEDs.

Step 4: Cable the access and uplink ports. Attach client devices, servers, or network appliances to the 48 x 10/100/1000BASE-T ports using appropriate Category 6/6a/7 cabling. Install the QSFP28 uplink module or transceiver in the uplink port and connect it to the core or aggregation layer with high-speed fiber, ensuring the link is negotiated and active.

Step 5: Configure stacking. If you’re deploying a stack, connect the two stacking ports between switches using compatible stacking cables. In the management interface, designate a master switch and align all members to share a unified spanning tree, VLAN schema, QoS policies, and security settings. Verify the stack appears as a single device in the management console and test failover scenarios.

Step 6: Enable MACsec and security policies. If data protection is required, enable MACsec on appropriate links and configure encryption keys using your security policy. Implement VLAN segmentation, access control lists, and basic firewall rules for control-plane and data-plane security. Establish monitoring and alerting to detect anomalies or unauthorized access attempts.

Step 7: Firmware, validation, and ongoing maintenance. Update to the latest stabilized firmware compatible with your network environment and management tools. Run connectivity tests across access ports, verify uplinks, confirm stacking functionality, and validate performance against expected benchmarks. Schedule regular firmware updates, back up configurations, and document changes for auditing purposes.

Pro tips for optimal deployment: plan a hierarchical design with clear separation of access, distribution, and core layers; implement consistent QoS policies to protect latency-sensitive applications; enable redundant power feeds where possible; and leverage Extreme Networks’ management platform for streamlined automation, monitoring, and security compliance across the stack.

Frequently asked questions

• Q: Does this model support PoE on its 48 ports? A: The provided product details do not explicitly state PoE capability for the 48 x 10/100/1000BASE-T ports. If PoE is required, verify with the vendor or consult the official specification to confirm whether an optional PoE variant or add-on is available for this switch.
• Q: How many switches can be stacked with this model? A: The device provides two dedicated stacking ports, enabling a stack of multiple switches. The maximum stack size depends on firmware and platform configuration; consult the official documentation for the exact stacking capacity supported in your software version.
• Q: What is the primary uplink interface? A: The switch includes one QSFP28 uplink port for high-bandwidth connection to core or aggregation layers. This uplink supports 40Gbps-class performance when using appropriate transceivers, and can be adapted for future densities as the network grows.
• Q: Is MACsec encryption available on all ports? A: MACsec capability is available on ports configured for secure links. Encryption can be applied where required, but actual deployment depends on your security policy, key management, and the hardware configuration used in your topology.
• Q: Which operating system does the device run? A: Extreme Networks switches typically run ExtremeXOS or a newer equivalent OS variant, offering centralized management, policy automation, and security features. Always refer to the specific model’s software compatibility notes when planning upgrades.