Network cable Dell QSFP28 to QSFP28 100GbE DAC direct-attach cable

Dell QSFP28 to QSFP28 100GbE DAC direct-attach cable is a short-reach copper interconnect designed for 100 Gigabit Ethernet links using QSFP28 connectors. It enables direct connection between compatible network devices such as switches, routers and network interface cards, providing a low-latency physical link for high-throughput environments. The cable is intended for use in dense data center deployments where cost-effective, energy-efficient and compact cabling is required.

Advantages

This direct-attach cable delivers a reliable 100GbE connection with low latency and reduced power consumption compared with optical modules. The QSFP28 form factor ensures compatibility with devices that accept QSFP28 ports and supports straightforward installation without separate transceivers. The copper construction provides robust electrical performance for short distances and simplifies rack and cable management in top-of-rack and intra-rack setups.

Suitable for

• Top-of-rack switch to server connections
• Switch-to-switch interconnects within the same rack or adjacent racks
• Direct links to NICs equipped with QSFP28 ports
• High-throughput, low-latency data center fabrics

Key specifications

• Connector type: QSFP28 on both ends
• Data rate: 100 Gigabit Ethernet
• Medium: Direct-attach copper (DAC)
• Typical reach: short-reach (intra-rack or adjacent racks)
• Latency: low, suitable for high-performance fabrics
• Form factor: compact QSFP28 housing

How to use

Install the QSFP28 connectors into compatible QSFP28 ports on the two devices to be linked, ensuring each connector is fully seated and the latch engages. Verify device compatibility and link settings in the network equipment management interface. After physical connection, confirm the link status and negotiated speed in the switch or host operating system and adjust configuration as needed for VLANs, MTU or link aggregation.

Usage recommendations

Use this DAC cable for short-distance 100GbE connections inside racks or between adjacent racks; avoid running it through long cable trays intended for optical fiber and maintain appropriate bend radius to preserve signal integrity. Verify compatibility with your network equipment's supported cable types and firmware versions before deployment.