DAC cable CBO QSFP28-DAC-2M 2 m — direct-attach copper, QSFP28 compatible with NetApp

CBO QSFP28-DAC-2M is a 2-meter direct-attach copper (DAC) cable designed for QSFP28 ports and validated for use with NetApp systems. It delivers a straightforward, low-latency physical link for 100 Gigabit Ethernet short-reach connections between switches, servers and storage devices. The cable's fixed QSFP28-to-QSFP28 connectors and copper construction remove the need for transceivers, making it a compact and cost-effective option for dense rack environments and top-of-rack aggregation.

Advantages

This DAC cable offers predictable electrical performance for 100GbE links with minimal protocol overhead and low latency. As a passive copper twinax assembly, it reduces system power consumption compared with active optics and simplifies installation by eliminating separate SFP/QSFP transceivers. The 2 m length balances flexibility and signal integrity for short interconnects, while compatibility with NetApp QSFP28 ports helps ensure interoperability in mixed-vendor data center deployments.

Suitable for

• Short-reach 100GbE connections between top-of-rack switches and aggregation switches
• Interconnects between servers and storage arrays in data center racks
• High-density patching where low latency and low power are required
• Environments preferring direct-attach copper over optical transceivers for cost or power reasons

Key specifications

• Connector type: QSFP28 to QSFP28
• Cable type: Direct-attach copper (twinax)
• Supported link speed: 100 Gigabit Ethernet (100GbE)
• Length: 2 meters
• Latency: low, suitable for short-reach high-speed links
• Power consumption: passive copper (no external power for transceivers)
• Construction: fixed assembly optimized for rack density

How to use

Install the CBO QSFP28-DAC-2M by inserting each QSFP28 connector into the corresponding QSFP28 port on the network devices until the latch engages. Ensure both devices are powered and that port settings match the intended 100GbE link configuration. No additional transceivers or fiber patching is required; treat the cable as a direct physical link. For link diagnostics, use the host device firmware or management software to verify link status and speed after connection.

Recommendations

Route the cable to avoid sharp bends and maintain the minimum bend radius specified by the manufacturer to preserve signal integrity. Use this 2 m DAC for short interconnect distances inside racks or between adjacent racks; for longer spans or when optical isolation is needed, select appropriate fiber solutions. Verify firmware and port compatibility on NetApp and other vendor equipment before deployment to ensure seamless operation.