Cisco QSFP-100G-SM-SR QSFP Module

Elevate your data center and network backbone with the Cisco QSFP-100G-SM-SR QSFP Module, a high-performance 100 Gigabit Ethernet transceiver designed for single-mode fiber links. This compact, hot-swappable module delivers dense, scalable bandwidth over fiber-infrastructure you already rely on, enabling fast upgrades to 100G without replacing your existing cabling. Built for reliability in enterprise, campus, and service-provider environments, it combines four parallel channels into a single QSFP package, transmitting data across four wavelengths over standard G.652 single-mode fiber with duplex LC connectors. Whether you’re consolidating data center interconnects, expanding core networks, or provisioning new WAN links, the QSFP-100G-SM-SR offers a robust, future-ready solution that maximizes port density and minimizes deployment complexity.

• High-density 100G connectivity over SMF: This module carries 100 Gigabit Ethernet by aggregating four lanes into a single QSFP form factor, enabling a scalable upgrade path from 40G/10G while preserving existing fiber infrastructure. The four-wavelength design supports efficient multiplexing and demultiplexing to deliver crisp, high-bandwidth performance across long reaches.
• Up to 2 km on G.652 single-mode fiber with duplex LC connectors: Designed for metro and data-center interconnect scenarios, the transceiver supports link lengths of up to 2 kilometers on standard single-mode fiber, simplifying deployment where fiber runs extend beyond shorter MMF distances. Duplex LC connectors ensure compatibility with widely deployed fiber optic installations and existing SFP/QSFP ports that support single-mode links.
• Compact QSFP28 form factor with plug-and-play integration: The QSFP-100G-SM-SR uses the familiar QSFP28 footprint, enabling seamless installation into Cisco switches and routers that support 100G SM-SR transceivers. Its hot-swappable design reduces downtime and aligns with modern data-center maintenance practices, allowing operators to upgrade in-place without chassis downtime.
• Integrated four-wavelength signaling for robust performance: The transceiver multiplexes and demultiplexes four optical channels inside the module, delivering a reliable, multi-wavelength 100G signal with strong tolerance to channel imbalances. This integrated approach helps maintain signal integrity across link budgets, minimizing the need for extensive external optical multiplexing equipment.
• Designed for Cisco ecosystems with reliability and support: As a Cisco original transceiver, this module is engineered for compatibility with Cisco devices and software, backed by Cisco's hardware warranty and support ecosystem. It’s ideal for data-center spine-leaf architectures, campus networks, and service-provider backbones that require consistent performance, proven interoperability, and vendor-backed reliability.

Technical Details of Cisco QSFP-100G-SM-SR QSFP Module

• Form factor: QSFP28
• Data rate: 100G Ethernet using four parallel 25G lanes (4x25G) carried over four wavelengths
• Fiber type: G.652 single-mode fiber (SMF)
• Maximum link length: Up to 2 kilometers
• Connector type: Duplex LC
• Wavelength multiplexing: Internal four-wavelength signaling with integrated mux/demux
• Transceiver type: 100G SM-SR transceiver designed for single-mode fiber links
• Operating environment: Cisco-supported hardware platform compatibility; RoHS compliant
• Power and thermal: Standard QSFP28 optical transceivers designed for data-center grade reliability and predictable performance (specific power figures vary by platform and vendor firmware)
• Compatibility notes: Requires a Cisco device and software release that supports 100G SM-SR transceivers; verify buy-list compatibility for your chassis or switch family

How to Install Cisco QSFP-100G-SM-SR QSFP Module

Installing the Cisco QSFP-100G-SM-SR is straightforward and designed for hot-swapping in compatible Cisco devices. Follow these guidance-packed steps to ensure a clean, reliable deployment:

Step 1: Verify compatibility and firmware. Before installation, confirm that your Cisco switch or router supports 100G SM-SR transceivers and that the device firmware is up to date. Check the platform compatibility list and recommended driver/firmware versions to guarantee optimal performance and warranty coverage.

Step 2: Prepare the fiber link. Ensure your G.652 single-mode fiber is clean, properly terminated, and routed with appropriate bend radii. Use duplex LC connectors and perform a routine fiber inspection to avoid insertion loss or connector contamination. Plan the link length to stay within the 2 km specification to preserve signal integrity.

Step 3: Power considerations. If your equipment supports hot-swapping, you can insert the transceiver with the system powered on. If you prefer, power down the device according to the vendor’s maintenance procedures, then proceed with installation. Handle the transceiver with care, avoiding touching the optical connectors or the exposed laser area.

Step 4: Install the module. Align the QSFP28 transceiver with the switch or router port and gently slide it into the slot until it seats with a firm click. Ensure the orientation matches the port and that the module is fully seated in the cage or retention mechanism. Do not force the module; resistance indicates misalignment.

Step 5: Connect the fiber. Attach the duplex LC fiber pair to the corresponding transceiver ports, ensuring correct polarity and stability. Secure the fiber to prevent strain on the connectors, and maintain appropriate bend radii to preserve signal integrity.

Step 6: Bring the link online and verify. Power up (if you powered down) and use the device’s management interface to verify transceiver presence, link status, and negotiated data rate. Commands such as show inventory, show interfaces transceiver detail, or equivalent will confirm the 100G operation and the health metrics of the link.

Step 7: Monitor performance. After deployment, monitor the link for error rates, SNR, and latency to ensure stable operation. If you observe degradation, inspect the fiber for contamination, re-seat connectors, and verify that both ends of the link are configured for 100G SM-SR operation and matched by the same wavelength scheme.

Note: Always follow your organization’s change-control procedures when inserting or removing network hardware to minimize service disruption and ensure proper asset tracking.

Frequently asked questions

• What is the maximum link length for the Cisco QSFP-100G-SM-SR? Up to 2 kilometers on G.652 single-mode fiber when paired with duplex LC connectors.
• What type of fiber and connectors does this transceiver use? It uses standard G.652 single-mode fiber with duplex LC connectors, suitable for single-mode deployments.
• What is the form factor and data rate? QSFP28 form factor with a 100G data rate, supporting four parallel 25G lanes (4x25G) inside the transceiver.
• Is the transceiver hot-swappable? Yes, the QSFP-100G-SM-SR is designed for hot-swapping in compatible Cisco devices, enabling in-service upgrades with minimal downtime.
• Do I need any special wiring or multiplexing equipment? The module internally multiplexes/demultiplexes the four wavelengths; external multiplexing equipment is not required for basic operation, though network design should account for overall link budgeting and fiber infrastructure.
• Which platforms support this transceiver? It is intended for Cisco devices that support 100G SM-SR transceivers. Always verify platform compatibility and firmware requirements with Cisco’s official documentation or your purchasing partner.
• How do I verify the module is functioning correctly after installation? Use your device’s management interface to verify transceiver presence, link status, and data rate. Look for a stable 100G link indicator and lack of error counters; refer to show inventory and show interfaces transceiver details for specifics.
• What maintenance considerations should I observe? Handle optical surfaces with care to avoid contamination, protect fibers from excessive bending, and maintain proper connector cleanliness. Regularly inspect and clean LC connectors prior to installation and after removal if the link is briefly disconnected.