Cisco 100GbE 100GBase LR4 QSFP+ Transceiver Module

The Cisco QSFP-100G-LR4-S= is a pluggable transceiver module that adds 100 Gigabit Ethernet connectivity to compatible Cisco switches and routers. It delivers long-reach 100GBase LR4 performance over single mode fiber and is built for installations where bandwidth demands are growing but rack space and power budgets remain tight.

By using four optical wavelengths between 1295 nm and 1309 nm, the module carries 100 Gbps of traffic up to 6.2 miles (10 km) without the need for signal regeneration. Administrators can swap it in or out while the chassis remains powered, so planned upgrades and urgent replacements finish quickly and with minimal disruption.

Typical deployments include spine-leaf fabrics that span large data center halls, enterprise core links that connect campus buildings, and service provider networks that must push 100 Gbps to remote aggregation sites. The compact QSFP+ footprint supports high port density, while a power draw of about 3.5 W helps keep thermal loads under control in crowded racks.

Compliance with IEEE 802.3 standards and ITU-T G.652 fiber specifications promotes interoperability with other standards-based optics and cabling, giving network teams flexibility when designing or expanding multilayer topologies.

• QSFP+ hot-swappable transceiver that provides one 100GBase LR4 interface
• Supports single mode fiber with duplex LC connectors
• Delivers 100 Gbps data rate across distances up to 6.2 miles (10 km)
• Operates on wavelengths from 1295 nm to 1309 nm
• Consumes approximately 3.5 W to aid in power and thermal management
• Works in Cisco platforms that accept QSFP modules and meet IEEE 802.3 and ITU-T G.652 requirements
• Ideal for data center, enterprise, and service provider environments that need scalable long-haul 100 GbE links