Cisco 40GbE QSFP+ Short-Reach Transceiver Module

The Cisco QSFP-40G-SR-BD= is a QSFP+ transceiver module that gives network teams an uncomplicated path to 40-Gigabit Ethernet. It plugs into a compatible switch or router and uses standard LC terminated multimode fiber to carry 40 Gbps of full-duplex traffic for up to 150 meters. If you already have duplex OM3 or OM4 fibers in place for 10 Gbps links, you can move straight to 40 Gbps without pulling new cable, which keeps upgrade costs in check and cuts installation time.

This module works well in data centers, campus cores, and aggregation layers where rack-to-rack or row-to-row distances stay within the 150-meter range. It is hot swappable, so maintenance windows stay short, and it follows the Multi-Source Agreement guidelines, which makes it interoperable with other MSA compliant equipment. Whether you are linking top-of-rack switches to an end-of-row aggregation switch, building a spine-leaf fabric, or boosting bandwidth between two core switches, the Cisco QSFP-40G-SR-BD= delivers reliable throughput with minimal disruption.

Administrators who prioritize energy efficiency will appreciate that this optical solution draws less power than many legacy copper or proprietary options. Its LC connectors are familiar to most installers, and the compact QSFP+ form factor conserves valuable port space on high-density platforms. In short, it is a straightforward way to meet growing traffic demands while extending the life of existing fiber investments.

• Delivers a full 40 Gbps of bidirectional bandwidth per link
• Operates over multimode fiber for distances up to 150 m
• Uses standard duplex LC connectors already common in many facilities
• MSA compliance promotes multi-vendor interoperability
• Supports OM3 and OM4 fibers, allowing reuse of installed 10 Gbps cabling
• Hot-swappable QSFP+ form factor simplifies maintenance and expansion
• Ideal for data center spine-leaf fabrics, aggregation links, and campus core upgrades