Cisco QSFP-100G-LR4-S=

Overview

The Cisco QSFP-100G-LR4-S= is a pluggable transceiver module designed to add 100 Gigabit Ethernet connectivity to compatible Cisco switches and routers. It supports long-reach 100GBase LR4 performance over single mode fiber, delivering data rates of 100 Gbps across distances up to 6.2 miles (10 km). This module is well suited for environments where bandwidth demands are increasing but space and power consumption must be carefully managed.

Using four optical wavelengths between 1295 nm and 1309 nm, it transmits high-speed data without requiring signal regeneration. Its hot-swappable design allows network administrators to replace or upgrade the module without powering down the chassis, minimizing downtime during maintenance or expansion.

Key features

• Hot-swappable QSFP+ transceiver that enables quick installation and replacement without disrupting network operations
• Supports single mode fiber with duplex LC connectors for reliable long-distance transmission
• Operates on four wavelengths to deliver 100 Gbps data rate over distances up to 10 km, ideal for extended network links
• Low power consumption of approximately 3.5 W helps maintain manageable thermal conditions in dense rack environments
• Compliance with IEEE 802.3 and ITU-T G.652 standards ensures interoperability with other standard-compliant optics and cabling
• Compact QSFP+ form factor supports high port density, making it suitable for spine-leaf fabrics, enterprise cores, and service provider networks

Key specs

• Data rate: 100 Gbps
• Distance: up to 10 km (6.2 miles)
• Wavelengths: 1295 nm to 1309 nm (four optical lanes)
• Connector type: duplex LC
• Power consumption: approximately 3.5 W
• Standards compliance: IEEE 802.3, ITU-T G.652
• Form factor: QSFP+

Connectivity and compatibility

This transceiver module is compatible with Cisco platforms that accept QSFP modules and adhere to IEEE 802.3 and ITU-T G.652 fiber specifications. It integrates seamlessly into existing network infrastructures that use single mode fiber and duplex LC connectors, providing a straightforward upgrade path for expanding 100 GbE links.

Its design supports high-density deployments in data centers and enterprise environments, making it a practical choice for network teams managing multilayer topologies and long-haul connections.

Ideal uses and environments

The module is a strong choice for data centers implementing spine-leaf architectures that require high-speed links across large halls. It also fits well in enterprise core networks connecting multiple campus buildings and in service provider networks delivering 100 GbE to remote aggregation sites. Its balance of long reach, power efficiency, and compact size makes it suitable for setups where space and thermal management are critical.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

Learn more

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more