Extreme Networks QSFP28 100GBASE-SR4 Optical Transceiver — MPO/MTP MMF 100 Gbps Module for Data Centers

Discover the speed and scalability your data center demands with the Extreme Networks QSFP28 Module. This high-performance 100GBASE-SR4 transceiver is engineered for optical networks and data networking, delivering ultra-high bandwidth in a compact, plug-in QSFP28 form factor. Designed for multi-mode fiber and MPO/MTP connectivity, it enables scalable, low-latency uplinks between switches, servers, and storage systems. Whether you’re refreshing an aging 40G/25G fabric or building out a modern 100G spine-leaf topology, this module provides the reliability, efficiency, and interoperability needed to support today’s most demanding workloads—from real-time analytics and AI inference to virtualization and cloud-scale deployments.

• Ultra-fast 100 Gbps performance — The module delivers a robust 100GBASE-SR4 experience by leveraging four parallel 25 Gbps lanes, enabling simultaneous data streams that maximize throughput and minimize latency. This architecture is ideal for spine-leaf architectures, high-velocity interconnects, and demanding workloads such as machine learning, database operations, and media-rich streaming environments. By supporting the 100GBASE-SR4 standard, you gain a scalable uplink solution that can grow with your network while preserving port density on your chassis and switch hardware. The result is a smooth upgrade path from 40G or 25G networks to 100G, reducing the need for wholesale hardware changes while dramatically increasing capacity for peak traffic windows and bursty workloads.
• MPO 12-fiber connector for high-density MMF links — This QSFP28 module uses an MPO/MTP 12-fiber interface to carry four parallel 25 Gbps channels over multi-mode fiber. The high-density connector minimizes rack space, cabling complexity, and footprint in dense data centers, while enabling straightforward deployment with widely available MMF infrastructure. The SR4 approach is optimized for short-reach links, making it an economical choice for data centers that rely on OM3/OM4 fiber. With careful fiber management and clean-term fiber optics, you can achieve consistent performance, dependable link budgets, and reliable operation across multiple racks and rows in your facility.
• Compact QSFP28 form factor for simple integration — The plug-in QSFP28 package fits standard 100G-ready switches and routers, enabling quick upgrades and scalable growth without overhauling your network hardware. Its modular design supports streamlined maintenance windows and reduces downtime during upgrades. End-to-end interoperability is a core focus, with adherence to widely adopted industry standards that ensure compatibility with a broad range of 100G-capable devices from various vendors. This compatibility translates into stronger investment protection, fewer integration headaches, and a future-proof foundation for evolving data center demands.
• Multi-mode fiber compatibility for cost efficiency — The 100GBase-SR4 configuration is purpose-built for short-reach MMF links, delivering high bandwidth at a lower total cost of ownership in many data center environments. The module supports OM3 and OM4 fiber types, providing flexibility in fiber selection and cabling. Short-reach, high-density links reduce cross-connect complexity and help maintain optimal airflow and cooling in dense racks. This balance of performance and affordability makes the QSFP28 SR4 module a strategic choice for modern data centers planning rapid, repeatable uplink deployments across multiple rows and clusters.
• Reliability with monitoring and ecosystem compatibility — Engineered for dependable operation, the QSFP28 SR4 module emphasizes signal integrity, robust construction, and compatibility with Extreme Networks switches as well as other IEEE 802.3 100GBASE-SR4-compliant devices. Many implementations include Digital Optical Monitoring (DOM), enabling real-time telemetry for proactive maintenance and efficient fault isolation. This capability helps network teams track temperature, voltage, and optical power levels, enabling predictive maintenance and reducing the risk of unexpected downtime in mission-critical applications.

Technical Details of Extreme Networks QSFP28 Module

• Form Factor: QSFP28
• Data Rate: 100 Gbps (4 x 25 Gbps lanes)
• Standard: IEEE 802.3 100GBASE-SR4
• Connector: MPO/MTP 12-fiber
• Fiber Type: Multi-mode fiber (MMF)
• Distance: Up to 100 meters on OM3/OM4 (distance varies with cable type and quality)
• Tx/Rx Channels: 4 lanes x 25 Gbps
• Monitoring: Digital Optical Monitoring (DOM) capable
• Compatibility: Designed for 100G-enabled Extreme Networks switches and other IEEE 802.3 100GBASE-SR4-compliant devices

how to install Extreme Networks QSFP28 Module

• Power down or place the host switch into a maintenance mode if required by your administrative policy. Identify the 100GBASE-SR4 QSFP28 slot in your Extreme Networks switch or compatible device and prepare for insertion by ensuring you have clean, compliant MMF fiber ready for connection.
• Carefully remove any existing module from the slot, following your device’s specific service manual. Handle the new module using proper ESD precautions and avoid touching the optical components or connector ferrule. Inspect the module for any visible damage before installation.
• Align the QSFP28 module with the slot’s guide rails and slide it in straight, applying even pressure until it seats securely. Do not force the module; if resistance is felt, stop and verify alignment with the slot guides to prevent damage to the connector or backplane.
• Secure the module by engaging any latches or locking mechanisms required by your hardware. After seating, power on the device (or return it from maintenance mode) and verify the port status through the management interface. Look for a healthy link state and the expected 100G bandwidth allocation on the corresponding port.
• Connect the MMF fiber cable to the MPO/MTP connector, ensuring proper polarity and cleanliness of connectors. Perform a basic link test to confirm signal integrity, checking for steady optical power levels and correct lane alignment. If possible, run a throughput test to validate performance in line with your service-level agreements and traffic profiles.

Frequently asked questions

• Q: What is the Extreme Networks QSFP28 Module used for? A: It is a high-speed 100GBASE-SR4 optical transceiver in QSFP28 form factor, designed for short-reach multi-mode fiber networks to provide high-bandwidth uplinks in data centers, campuses, and enterprise networking environments.
• Q: What fiber type and connector does it require? A: The module uses multi-mode fiber (MMF) with an MPO/MTP 12-fiber connector, commonly deployed on OM3 and OM4 fiber to achieve 100 Gbps over short distances.
• Q: How far can I run this module? A: Typical reach is up to 100 meters on OM3/OM4 MMF, though actual distance can vary based on fiber quality, connector cleanliness, and system margins. Always consult your vendor’s guidelines for your exact fiber and cable setup.
• Q: Is this module interoperable with other vendors? A: Yes. The 100GBASE-SR4 standard is widely supported, and the module is designed to be compatible with IEEE 802.3 compliant ports on a range of 100G-capable switches and routers, though always verify with specific device compatibility notes.
• Q: Does it support monitoring? A: Many Extreme Networks QSFP28 SR4 modules support Digital Optical Monitoring (DOM), offering real-time telemetry on temperature, voltage, and optical power to aid in proactive maintenance and faster troubleshooting.