Cisco QSFP-40G-SR-BD=

Overview

The Cisco QSFP-40G-SR-BD= is a 40GbE QSFP+ short-reach transceiver module designed to provide a straightforward upgrade path to 40-Gigabit Ethernet. It supports full-duplex data transmission at 40 Gbps over multimode fiber for distances up to 150 meters, making it a practical choice for data centers and campus networks. This module fits into compatible switches or routers and leverages existing duplex OM3 or OM4 fiber infrastructure, reducing the need for costly new cabling.

Its hot-swappable design minimizes downtime during maintenance, and compliance with Multi-Source Agreement (MSA) standards ensures compatibility with a wide range of networking equipment. The compact QSFP+ form factor helps conserve valuable port space on high-density platforms, while its energy-efficient operation lowers power consumption compared to older copper or proprietary solutions.

Key features

• Delivers 40 Gbps of bidirectional bandwidth to support high-speed network demands
• Operates over standard duplex LC connectors, simplifying installation and compatibility
• Supports distances up to 150 meters on OM3 and OM4 multimode fiber, enabling reuse of existing cabling
• Hot-swappable QSFP+ form factor allows quick replacement or upgrades without disrupting network operations
• MSA compliance ensures interoperability with equipment from multiple vendors
• Energy-efficient design reduces power consumption in dense networking environments
• Ideal for data center spine-leaf fabrics, aggregation layers, and campus core network upgrades

Key specs

• Data rate: 40 Gbps full duplex
• Fiber type: Multimode (OM3 and OM4)
• Maximum reach: 150 meters
• Connector type: Duplex LC
• Form factor: QSFP+
• Compliance: Multi-Source Agreement (MSA)
• Power consumption: Lower than many legacy copper or proprietary transceivers

Connectivity and compatibility

This transceiver module plugs into QSFP+ ports on compatible Cisco switches and routers, providing a seamless upgrade path for existing 10 Gbps multimode fiber links. Its use of standard duplex LC connectors means it integrates easily with common fiber cabling infrastructure, avoiding the need for specialized adapters or new cable runs. The MSA compliance further broadens compatibility, allowing it to work alongside other vendors’ MSA-compliant equipment in mixed environments.

Ideal uses and environments

The Cisco QSFP-40G-SR-BD= is well suited to data center environments where high-density, high-speed connectivity is essential. It works effectively in spine-leaf architectures, aggregation layers, and campus core networks where link distances remain within 150 meters. Network administrators looking to upgrade from 10 Gbps to 40 Gbps without extensive recabling will find this module a cost-effective and efficient solution. Its hot-swappable nature also makes it a strong choice for environments requiring minimal downtime during maintenance or expansion.

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