QSFP Transceiver Module Cisco QSFP-100G-SR1.2 100Gbit/s Fiber Optic

The Cisco QSFP-100G-SR1.2 is a 100 Gbit/s fiber optic transceiver module with a QSFP form factor designed for short-reach multimode fiber links. It supports high-density port deployments in data centers and high-performance computing environments, providing a compact solution for aggregation and spine-leaf topologies. The module is engineered to meet industry-standard electrical and optical interfaces for seamless interoperability with compatible switches and optical equipment.

Advantages

This QSFP transceiver delivers 100 Gbit/s throughput in a small, hot-pluggable QSFP package, enabling high port density and simplified cabling. It is optimized for short-reach multimode fiber applications, offering stable optical performance and predictable power consumption. The module supports vendor interoperability and standard management features via the QSFP interface, making it suitable for rack-scale deployments where space and energy efficiency are important.

Suitable for

• Data center aggregation and spine/leaf fabric links
• High-performance computing clusters requiring high bandwidth
• Top-of-rack switch uplinks over multimode fiber
• Short-reach connections within campus or enterprise wiring closets

Key specifications

• Nominal data rate: 100 Gbit/s
• Form factor: QSFP (quad small form-factor pluggable)
• Optical medium: multimode fiber (short-reach)
• Wavelength and optics class: short wavelength for multimode operation
• Interface: four-lane electrical and optical aggregation
• Operational temperature range suitable for standard data center environments
• Hot-pluggable design for in-service installation and replacement

How to use

Install the transceiver into a compatible QSFP port on a switch or router while the host device is powered on or off, following the equipment manufacturer’s instructions for hot-pluggable modules. Connect appropriate multimode fiber cables with matching connectors (for example, MPO/MTP where applicable) and verify link status through the host device management interface. Monitor module diagnostics and performance counters provided by the host to ensure optical levels and lane alignments are within expected ranges.

Usage recommendations

Use certified multimode fiber with proper patching and polarity to achieve optimal short-reach performance. Ensure the transceiver’s optical specifications match the fiber type and link distance. For reliable operation, observe handling precautions such as using dust caps when the module or cables are unplugged and avoiding excessive bending of fiber cables.