5520-48SE Extreme Networks 1000Base-x 48-Port SFP Switch

Extreme Networks 5520-48SE Overview

The 5520-48SE Extreme Networks 1000Base-X 48-Port SFP Switch is a high-performance, enterprise-class switch that delivers superior flexibility, scalability, and resilience. Designed for campus aggregation, enterprise edge, and branch deployments, this switch offers 48 SFP ports that support 1000Base-X fiber connectivity for high-speed network communication and long-distance data transmission.

Optimized for Modern Enterprise Infrastructure

With support for a range of Layer 2 and Layer 3 switching capabilities, the 5520-48SE delivers highly reliable, low-latency, and secure performance in demanding environments. Enterprises seeking to transition to next-generation network topologies benefit from this switch's robust feature set and Extreme Networks' centralized management platforms.

5520-48SE Technical Specifications and Performance

48-Port 1000Base-X SFP Design

This switch features 48 dedicated SFP (Small Form-factor Pluggable) ports that support 1 Gigabit Ethernet over fiber. These ports are ideal for high-density fiber deployments, especially in campus environments where copper cabling may be limited or distance requirements demand fiber infrastructure.

Flexible Uplink Options

In addition to the 48 SFP ports, the 5520-48SE model supports high-speed uplinks through optional 10G and 25G ports, allowing seamless integration with core switching and aggregation layers. Uplink modules may include dual-speed SFP+ or QSFP28 slots, enabling interoperability with existing network topologies.

Advanced Switching Architecture

Powered by an advanced switching fabric, the 5520-48SE delivers high throughput and low latency. It supports cut-through and store-and-forward switching, ensuring optimal packet processing and reduced bottlenecks across the network. It is capable of non-blocking performance even at full load.

Performance Highlights

• Switching Capacity: Up to 336 Gbps
• Forwarding Rate: Over 250 Mpps (million packets per second)
• MAC Address Table Size: 64K entries
• Packet Buffer Memory: 32 MB
• Latency: Sub-microsecond (varies by traffic type and frame size)

Reliability and High Availability

Redundant Power Supply and Cooling

The 5520-48SE supports dual hot-swappable power supplies and field-replaceable fan trays to ensure continuous operation. This hardware redundancy is crucial for mission-critical deployments where network uptime is non-negotiable.

Failover and Resilience

With support for MLAG (Multi-Chassis Link Aggregation) and VRRP (Virtual Router Redundancy Protocol), this switch provides automatic failover and enhances link resilience. These features help maintain uninterrupted service during hardware or link failures.

Security Features and Network Protection

Comprehensive Security Suite

Network administrators can count on robust security mechanisms such as Access Control Lists (ACLs), 802.1X port security, and DHCP snooping. These features collectively provide protection against unauthorized access, address spoofing, and rogue DHCP servers.

Advanced Threat Mitigation

Extreme Networks' firmware enables the 5520-48SE to provide enhanced DoS (Denial of Service) attack prevention, IP source guard, dynamic ARP inspection, and BPDU guard to shield critical resources from internal and external threats.

Encryption and Management Security

• SSHv2 and SNMPv3 for secure management access
• HTTPS and RADIUS/TACACS+ authentication
• Secure boot and image verification