Cisco SFP28 Module — 25G Ethernet Transceiver

The Cisco SFP28 Module is a cutting-edge connectivity solution engineered to meet the rising demands of modern data centers and high-performance computing environments. This compact, hot-swappable transceiver delivers robust 25 Gigabit Ethernet capabilities, combining Cisco’s renowned reliability with flexible fiber options to optimize bandwidth, reduce latency, and simplify network scaling. Built for cloud-native workloads, big data analytics, AI inference, and dense leaf-spine architectures, the Cisco SFP28 Module is designed to empower your network to handle demanding applications with consistent performance and streamlined management.

• Ultra-fast 25G Ethernet performance: At its core, the SFP28 module provides 25 gigabits per second of aggregated data throughput, enabling higher east–west traffic within data centers, faster interconnection of servers and storage, and improved application response times for modern workloads.
• Compact, hot-swappable design: The small-form-factor SFP28 transceiver slots into standard Cisco switches, routers, and network adapters without requiring downtime. Its hot-swappable nature minimizes maintenance windows, supports live upgrades, and preserves business continuity during firmware updates or capacity expansion.
• Flexible fiber options for varied deployments: Depending on the SKU, it supports multiple fiber types and link distances, including short-reach multimode and longer-reach single-mode configurations. This versatility lets you optimize total cost of ownership while meeting cabling and distance requirements across the data center.
• Digital optical monitoring (DOM) for proactive reliability: Integrated monitoring provides real-time visibility into laser temperature, optical power, and other key diagnostics. This empowers proactive health checks, enables SLA adherence, and simplifies fault isolation and preventative maintenance.
• Cisco-tested compatibility and ecosystem support: Built to work seamlessly with Cisco Catalyst and Nexus platforms, the module benefits from Cisco's rigorous interoperability testing, warranty coverage, and a broad ecosystem of compatible transceivers, cables, and support resources.

Technical Details of Cisco SFP28 Module

• Data rate: 25 Gb/s per link (module performance aligned to 25GBASE-Ethernet standards, varies by SKU).
• Form factor: SFP28 hot-swappable transceiver for compact deployment in data-center networking gear.
• Optical interface: LC duplex connector compatible with standard fiber cabling; wavelength and reach vary by model (SR, LR, or other options depending on SKU).
• Monitoring: Digital Optical Monitoring (DOM) support for real-time diagnostics and health monitoring.
• Compatibility: Designed for Cisco platform interoperability; verify specific model compatibility with your switch or router firmware version and chassis.
• Physical and environmental notes: Typical operating conditions align with data-center environments; exact temperature range, power consumption, and MTBF are SKU-dependent and should be confirmed in official Cisco specifications.
• UPC/SKU reference: Not provided in the current product data here; please verify with Cisco catalog or vendor documentation for precise UPC/SKU details and corresponding specifications.

How to Install Cisco SFP28 Module

• Power down the device or follow your data-center’s hot-swap procedure if required by your operational policy. Verify that the device supports hot-swapping for transceiver modules.
• Identify the appropriate SFP28 slot on the Cisco switch, router, or NIC where the module will be installed. Confirm there is no physical obstruction and that the slot latch is accessible.
• Remove the existing module (if replacing) by pressing the ejector tab until the module pops out slightly, then carefully pull it straight out from the slot.
• Align the Cisco SFP28 module with the slot notch and gently insert it until it seats firmly. You should hear or feel a click indicating a secure connection; ensure the latch engages properly to lock the module in place.
• Connect the fiber optic cable to the LC duplex connectors as per the link plan (ensure proper polarity and cable type). After installation, re-verify power and link status, then perform a basic connectivity test to confirm the link is established and data can traverse the path.

Frequently asked questions

• What is the Cisco SFP28 Module used for? It is a 25G Ethernet transceiver designed to enable high-bandwidth server-to-network connections in data centers, HPC environments, and storage networks. It plugs into Cisco devices to provide scalable, high-speed connectivity with flexible fiber options.
• What is 25G Ethernet? 25G Ethernet refers to a data-rate standard that delivers 25 gigabits per second of throughput per channel. It is commonly used to accelerate east–west traffic in dense data-center fabrics and to support modern workloads that require low latency and high bandwidth.
• Is the Cisco SFP28 module compatible with my Cisco switch? Compatibility depends on the specific SKU, firmware version, and the switch model. Always verify the module’s compatibility matrix in Cisco’s official documentation and confirm that your device firmware supports the SFP28 transceiver you intend to use.
• Does the module support Digital Optical Monitoring (DOM)? Yes, many Cisco SFP28 modules include DOM support for real-time optical diagnostics, helping you monitor critical parameters and maintain link health. Check the exact SKU specifications to confirm DOM availability.
• What affects the reach of the SFP28 module? Reach is determined by the module’s optical design (SR vs. LR or other variants), fiber type (MMF vs. SMF), link budget, and installation quality. Short-reach variants work well in data-center campus environments, while longer-reach options extend connections across larger campuses or between data centers. Always consult the SKU’s official specifications for precise distance capabilities.