StarTech.com Cisco QSFP-40GE-LR4 Comp. QSFP+ Module – 40GBASE-LR4 Fiber Transceiver

Experience blazing-fast 40 Gigabit Ethernet with the StarTech.com Cisco QSFP-40GE-LR4 Comp. QSFP+ Module. This Cisco QSFP-40GE-LR4 compatible transceiver is engineered to deliver dependable, high-performance 40GBASE-LR4 connectivity over single-mode fiber (SMF). Designed, programmed and tested to work with Cisco brand switches and routers, this hot-swappable QSFP+ module provides a seamless plug-and-play upgrade path for data centers, enterprise networks, and service-provider environments. Whether you’re upgrading an aging backbone, expanding inter-data-center connectivity, or strengthening core network capacity, this LR4 module helps you achieve longer reach with premium signal integrity, reduced latency, and simplified cabling.

• 40GBASE-LR4 performance: Delivers the full bandwidth of 40Gbps across four 10Gbps lanes over single-mode fiber, enabling dense, scalable network topologies and future-proofing data-center interconnects with room to grow.
• Cisco compatibility and reliability: Specifically designed, programmed and tested to work with Cisco switches and routers, ensuring dependable operation in production environments that rely on Cisco infrastructure.
• Single-mode fiber reach: Optimized for long-reach links on SMF, supporting extended distances between data-center cores, campus backbones, or metro networks while maintaining high signal integrity.
• Hot-plug QSFP+ form factor: A compact, hot-swappable transceiver that snaps into standard QSFP+ ports, enabling easy upgrades and minimal downtime during installation or replacement.
• Comprehensive compatibility and support: Backed by StarTech’s robust support ecosystem and product warranties, with compatibility guarantees for Cisco-based deployments and the flexibility to integrate into diverse fiber networks.

Technical Details of StarTech.com Cisco QSFP-40GE-LR4 Comp. QSFP+ Module

• Product Type: QSFP+ optical transceiver module
• Standard: 40GBASE-LR4
• Interface: QSFP+ hot-swappable module for 40G Ethernet links
• Wavelength: 1310 nm (typical for LR4 operation)
• Fiber Type: Single-Mode Fiber (SMF)
• Distance Capability: Long-reach links (distance varies with fiber quality and installation); typically suitable for up to several kilometers on SMF
• Fiber Connectors: Multilane LC fiber interface (four lanes) compatible with LR4 link configurations
• Voltage/Power: Standard QSFP+ power consumption typical for 40G LR4 modules; operates within vendor-specified thermal limits
• Compliance & Compatibility: Compliant with 40GBASE-LR4 specifications; designed for Cisco environments and tested for reliability in mixed-vendor network topologies where applicable
• RoHS & Quality: RoHS-compliant, built for enterprise-grade performance and long-term operation

how to install StarTech.com Cisco QSFP-40GE-LR4 Comp. QSFP+ Module

Installing the StarTech.com QSFP-40GE-LR4 module is straightforward and aligns with standard procedure for upgrading or expanding Cisco-based networks. Follow these steps to ensure proper seating, alignment, and link establishment without downtime surprises:

• Power down the affected network equipment if required by your maintenance policy, or follow hot-swappable guidelines if your deployment supports live insertion.
• Identify an available QSFP+ port on your Cisco switch or router that supports 40G LR4 operation and is configured for high-speed Ethernet.
• Carefully align the QSFP+ module with the slot, then insert it straight until it seats firmly. Do not apply sideways force; ensure the latch or release mechanism engages as designed.
• Connect the SMF fiber cables to the module’s four-lane LC fiber interface (as required by your link design), ensuring clean, properly terminated connections with LC connectors. Use appropriate fiber patch cables and routing to minimize bend radius and signal loss.
• Power up the device (if powered down) and verify the module is recognized by the system. Check link status LEDs and/or the device’s management interface to confirm the 40G link has come up and is stable. Perform a basic throughput check to verify 40Gbps performance across the link.

Post-install considerations include verifying the link budget for the specific MAR/SMF fiber you are using, ensuring proper cabling to minimize attenuation, and validating performance under typical traffic loads. Depending on your network configuration, you may need to configure interface settings on the Cisco device to enable the 40G interface, set appropriate MTU values, and ensure that the LR4 link is operating in the expected mode (for example, single-mode fiber with appropriate WDM channel assignments if applicable). Always refer to Cisco device documentation for exact CLI commands and best practices related to 40G QSFP+ interfaces and LR4 operation.

Frequently asked questions

• Q: Is this module compatible with Cisco switches and routers? A: Yes. The StarTech.com QSFP-40GE-LR4 Comp. QSFP+ Module is designed, programmed and tested to work with Cisco brand switches and routers, providing reliable 40GBASE-LR4 connectivity on supported Cisco devices.
• Q: What type of fiber does it use? A: It uses Single-Mode Fiber (SMF) suitable for long-range LR4 links. This enables extended reach between data-center facilities and campus networks when paired with appropriate SMF cabling.
• Q: What is the maximum distance for LR4 on SMF? A: The LR4 wavelength configuration is optimized for long-distance applications, with reach dependent on fiber quality, connectors, and overall link budget. Typical deployments target multi-kilometer links, subject to installation conditions.
• Q: How do I install this module? A: The module is hot-swappable and fits standard QSFP+ ports. Insert into a compatible slot, attach the SMF fibers, power on the device (if required), and verify the link status and throughput using your device’s management interface or CLI.
• Q: Can I mix this module with other vendors? A: While designed for Cisco compatibility, LR4 modules can operate in certain mixed-vendor environments if the devices support third-party transceivers and the link budget meets requirements. Always check the specific device and network policy before deployment.
• Q: Is there a warranty? A: StarTech typically offers warranty coverage and access to technical support for this module, providing assurance for enterprise deployments and data-center operations.