Cisco Qsfp 100Gbase Lr4 Optical Transceiver Long Reach Single Mode Lc Duplex 100G Module For Enterprise Networks

The Cisco QSFP+ 100GBase-LR4 Optical Transceiver is a high-performance, hot-swappable plug-in module designed to elevate data-center connectivity. Built for enterprise networks that demand scalable bandwidth, this transceiver delivers 100 Gigabit Ethernet capabilities over single-mode fiber, making it ideal for core, distribution, and interconnect deployments. With an LC duplex interface and a compact QSFP+ form factor, it preserves rack density while enabling long-reach links between switches, routers, and optical devices. Engineered for reliability and ease of maintenance, this module supports modern workloads—from virtualization and cloud services to data analytics—without compromising on performance or manageability.

• Ultra-high bandwidth in a compact form factor: The QSFP+ 100GBASE-LR4 module enables dense 100 Gigabit Ethernet connectivity in data centers, campuses, and interconnect fabrics. By consolidating four wavelength channels into a single QSFP+ transceiver, it delivers scalable, high-capacity links that simplify cabling and reduce switch-to-switch port counts, helping you maximize rack space and simplify network design.

• Long reach over single-mode fiber (SMF): Designed for enterprise, hyperscale, and service-provider networks, this LR4 transceiver supports reach typically up to 10 kilometers on SMF. It enables seamless data-center interconnects, campus backbones, and metropolitan networks, connecting distant devices with low attenuation and robust link quality.

• LR4 wavelength design for high-performance links: The LR4 multi-channel design targets long-distance transmission by leveraging four wavelength channels. This architecture provides precise spectral separation and improved dispersion tolerance, ensuring reliable performance for demanding workloads such as virtualization, cloud services, and large-scale storage networks.

• Reliable, hot-swappable operation: The transceiver is engineered for hot-swapping, allowing you to insert or replace the module with the host equipment powered on (per vendor guidelines). This minimizes maintenance windows and reduces downtime, which is essential for mission-critical data-center operations and service-provider environments.

• Standards-compliant, interoperable connectivity: Designed for 100 Gigabit Ethernet networks and standard optical networking practices, this Cisco QSFP+ module supports broad interoperability with compatible switches, routers, and optical devices. Its LC duplex interface and industry-standard SMF compatibility make it a flexible choice for diverse network architectures and vendor ecosystems.

Technical Details of Cisco QSFP+ Module

• Form Factor: QSFP+

• Data Rate: 100GBase-LR4 (100 GbE)

• Interface: 1 x LC duplex

• Fiber Type: Single-mode

• Reach: Typically up to 10 km on SMF

• Wavelength/Channel: LR4 multi-channel design optimized for long-distance transmission over four wavelength channels

• Power Characteristics: Not specified in provided data; consult Cisco datasheet for exact power consumption

• Hot-Swappable: Yes

• Standards: Compatible with 100 Gigabit Ethernet networks and standard optical networking practices

How to Install Cisco QSFP+ Module

• Confirm compatibility: Verify that your switch or router supports QSFP+ modules at 100GBase-LR4 and that the device firmware is up to date with the vendor’s recommended version. Incompatibilities can affect performance or prevent the module from functioning correctly.

• Prepare for installation: If your equipment supports hot-swapping, you may install the module with power on according to the vendor’s guidelines. If required, follow the official shutdown procedures to minimize risk before physical installation.

• Insert the module: Align the QSFP+ transceiver with the designated port and firmly insert until the latch engages. Ensure the module is seated properly and that the optical interface is clean and free of debris.

• Connect the fiber cable: Use a high-quality LC duplex single-mode fiber patch cable. Confirm proper polarity and secure the connectors to minimize signal loss. Clean fiber ends prior to connection to prevent contamination that can degrade link quality.

• Power up and verify: After installation, power on (if applicable) and monitor port status indicators. Run basic connectivity tests, check link status, and perform any vendor-recommended diagnostics to confirm a stable 100G link.

Frequently asked questions

• Q: What is 100GBase-LR4?

  A: 100GBase-LR4 is a 100 Gigabit Ethernet standard that uses four wavelength channels on single-mode fiber to achieve long-reach connections, typically up to 10 km. It is designed for high-capacity links between data centers, campus backbones, and interconnecting core devices.

• Q: What is the reach of this transceiver?

  A: The LR4 transceiver is specified to reach up to approximately 10 kilometers on standard single-mode fiber, depending on cable quality, connectors, and system design. This makes it ideal for data-center interconnects and larger campus networks.

• Q: Is this transceiver hot-swappable?

  A: Yes. The Cisco QSFP+ 100GBase-LR4 module is designed to be hot-swapped, allowing installation or replacement without powering down the host device in accordance with vendor guidelines, which minimizes downtime.

• Q: What kind of fiber and connector does it use?

  A: It uses single-mode fiber with an LC duplex optical connector, a widely adopted interface for long-reach 100G links in modern data centers and service-provider networks.

• Q: What should I check before purchasing?

  A: Verify compatibility with your network switch or router (QSFP+ 100GBase-LR4 support), confirm firmware recommendations, and ensure proper cabling and fiber quality to achieve the desired reach and performance.