Description
Lenovo 3M Passive QSFP28 DAC
Experience the speed and reliability of 100 Gbit/s connectivity with Lenovo’s 3M Passive QSFP28 Direct Attach Cable (DAC). This high-performance copper interconnect is engineered for data centers that demand ultra-low latency, stable throughput, and effortless deployment. The Lenovo 3M Passive QSFP28 DAC is designed for short-reach interconnections between high-density network devices—such as servers, top-of-riber switches, storage arrays, and leaf-spine fabrics—providing a plug-and-play solution that minimizes downtime and simplifies data-center cabling. With a precise 3-meter (9.84 ft) length, this DAC optimizes space, prevents cable clutter, and helps you create scalable, future-ready 100G Ethernet topologies without compromising performance or reliability.
- 3 meters (9.84 feet) in length provides flexible, clean arrangements for rack-to-rack or server-to-switch interconnects in dense data-center environments.
- QSFP28 to QSFP28 passive copper cable delivers full 100 Gbps bandwidth across four 25 Gbps lanes, ideal for short-reach interconnects with minimal signal loss.
- Passive design means no external power or active components are required, reducing energy use and simplifying installation while lowering total cost of ownership.
- Plug-and-play compatibility with Lenovo servers, switches, and networking gear that support QSFP28 100G interfaces, enabling quick rollout and straightforward upgrades.
- Durable construction and reliable performance with robust QSFP28 connectors and copper media engineered to withstand frequent deployments, hot-swapping where supported, and long-term operating stability.
Technical Details of Lenovo 3M Passive QSFP28 DAC
- Length: 3 meters (9.84 feet)
- Cable Type: Passive QSFP28 Direct Attach Copper (DAC) cable
- Data Rate: 100 Gbps total (4 x 25 Gbps lanes)
- Connectors: QSFP28 on both ends
- Application: Short-reach data-center interconnects, server-to-switch, switch-to-switch, and high-density top-of-rack deployments
- Compatibility: Primarily designed for Lenovo networking hardware, with QSFP28-form factor ensuring broad interoperability across 100G Ethernet environments that support QSFP28
how to install Lenovo 3M Passive QSFP28 DAC
- Power down or ensure your devices support hot-swapping for QSFP28 DACs, then locate the QSFP28 ports on the devices you intend to connect.
- Align the connectors with the QSFP28 ports and insert gently until the connectors seat firmly. Do not force or bend connectors at sharp angles.
- Ensure the cable length and routing prevent excessive bending; maintain the recommended bend radius to protect copper conductors and preserve signal integrity.
- Power up the devices (or confirm link status if hot-swapping) and check the link LEDs on both ends. A solid or blinking link indicator typically confirms a healthy connection.
- Run basic network tests to verify throughput and latency. If performance issues arise, verify port configurations, speed settings (100G), and cabling alignment, then re-seat the DAC if needed.
Frequently asked questions
- What is the Lenovo 3M Passive QSFP28 DAC? It is a 3-meter passive copper Direct Attach Cable with QSFP28 connectors, designed for high-speed 100G Ethernet connections in data centers.
- What does “passive” mean for this DAC? A passive DAC contains no active electronics or power requirements; it relies on the host devices’ transceivers for signal processing and is intended for short-reach deployments where active components are unnecessary.
- What devices is it compatible with? It is optimized for Lenovo networking hardware and other QSFP28-compatible devices that support 100G interfaces. Always verify your port speed and compatibility in your device’s documentation.
- What length is ideal for 100G deployments? For many data-center topologies, a 3-meter DAC is ideal for spine-leaf or top-of-rack layouts where devices are within a few meters of each other and cable congestion is a concern.
- Is it hot-swappable? In many Lenovo and compatible environments, QSFP28 DACs are hot-swappable if the devices support it. Always follow your equipment’s guidelines for hot-swapping and cabling.
- Can I mix this DAC with fiber or longer copper cables? No. DACs are intended for short-reach copper interconnects. For longer distances, consider optical transceivers with fiber cables appropriate to your network design.
- How do I verify bandwidth and latency? Use standard network benchmarking tools (iperf, ethtool, or vendor-specific test suites) to confirm throughput, latency, and error rates across both ends of the link.
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