Extreme Networks 400G QSFP-DD DR4 Optical Transceiver

The Extreme Networks 400G QSFP-DD DR4 Optical Transceiver is a next-generation coherent optical module designed for deployment in enterprise and hyperscale data-center spine architectures. Operating at 400 Gigabit Ethernet speeds over single-mode fiber, the DR4 (Datacenter Reach 4) variant delivers extended link distances beyond standard SR4 technology, making it essential for large-scale fabric deployments where spine-to-spine and spine-to-leaf interconnectivity demands both bandwidth density and geographical flexibility. The transceiver utilizes quad-lane 100G per lane architecture with coherent signaling, enabling lower power consumption and improved signal integrity compared to prior-generation 400G implementations.

The module integrates seamlessly with Extreme Networks 7720 spine switch platforms and compatible third-party IEEE 802.3bs-aligned systems. DR4 technology supports distances up to 2 kilometers over standard single-mode fiber (SMF), enabling multi-building campus interconnects and modular data-center expansion without requiring intermediate regeneration. The transceiver incorporates digital signal processing (DSP) and adaptive equalization for robust performance across diverse fiber plant conditions, with comprehensive QSFP-DD form-factor management via standard I²C interfaces.

Launched in 2024-Q1, this transceiver addresses the 2025-2026 demand surge driven by AI/ML workload scaling, 800G upgrade roadmaps, and lead-time pressures in coherent optical components. High-volume enterprise deployments targeting cloud infrastructure modernization, large language model training facilities, and next-generation financial services networks are driving accelerated adoption of 400G spine architectures.

Ideal for

• Hyperscale data-center spine-to-spine interconnectivity supporting 400GbE fabric densification with 1-2km reach across multi-building campuses
• Large-scale AI/ML training cluster topologies requiring sustained 400Gbps aggregate throughput between compute blocks and storage systems
• Financial services and high-frequency trading networks deploying low-latency interconnect fabrics with extended spine reach for geographic redundancy
• Cloud service provider multi-pod architectures enabling modular expansion of compute-to-storage ratios without core network regeneration
• Research and scientific computing centers (HPC/HEP) requiring lossless 400GbE connectivity across geographically distributed facility sections
• Enterprise private cloud and containerized workload platforms scaling to 10,000+ server clusters with coherent optical interconnect

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.