Cisco QSFP-4X25G-LR-S QSFP to 4xSFP28 25G LR Breakout Transceiver

The Cisco QSFP-4X25G-LR-S is a breakout transceiver that converts a single QSFP28 100G port into four independent SFP28 25G LR channels. This architecture enables efficient fan-out of high-speed uplinks from top-of-rack switches to quad small form-factor pluggable server NICs, delivering flexible port density without requiring new hardware investment.

Designed for long-reach datacenter interconnect applications, each of the four 25G LR channels operates independently with full-duplex capability and supports distances up to 10 km over single-mode fiber. The breakout transceiver integrates four complete optical transceivers in a single QSFP28 form factor, eliminating the need for external breakout cables while maintaining signal integrity across all four lanes.

This module is particularly suited for dense datacenter environments where cost-efficient scaling from 100G infrastructure to multiple 25G server connections is required. The LR optics provide the reach necessary for campus and metro datacenter topologies while the breakout architecture reduces overall cabling complexity and operational overhead.

Ideal for

• ToR switch 100G port breakout into four 25G server uplinks in three-tier datacenter networks
• Campus datacenter interconnect where long-reach fiber distances up to 10 km are required between facilities
• Server NIC clustering and load-balancing across quad 25G SFP28 ports with unified optical connectivity
• Cost-efficient horizontal scaling of 25G server connectivity without replacing existing QSFP28 switch infrastructure
• Storage array backend networking with multi-path 25G connections from unified 100G uplinks
• High-performance computing cluster interconnect leveraging quad independent 25G LR channels

Technical specifications

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