HPE HP BLC 40G QSFP+ 4X10G SFP+ 3M DAC Cable - 721064-B21

HPE 721064-B21 Concise Descriptor

Overview

The HPE 721064-B21 is a 3-meter Direct Attach Copper (DAC) cable designed for high-density, short-reach interconnects within racks. It breaks out a single 40Gbps QSFP+ port into four independent 10Gbps SFP+ interfaces. This cable is critical for server aggregation switches, top-of-rack switches, and high-performance computing environments where you need to connect multiple 10GbE devices to a 40GbE uplink or switch port without incurring the cost and complexity of optical transceivers and fiber cabling. The 721064-B21 provides a cost-effective, low-latency solution for direct server-to-switch or switch-to-switch connections.

Compatibility

This cable is designed for use with HPE ProLiant servers and HPE FlexFabric, FlexNetwork, and Aruba data center switches equipped with QSFP+ (40Gbps) and SFP+ (10Gbps) ports. It is compatible with any system utilizing standard QSFP+ and SFP+ interfaces for direct attach copper connections, enabling breakout configurations from 40GbE to 4x10GbE.

Installation Notes

Direct Attach Copper cables require no configuration. Ensure the QSFP+ connector is fully seated in the 40GbE port and the four SFP+ connectors are fully seated in their respective 10GbE ports. The cable is passive, drawing no power and requiring no drivers. For optimal signal integrity, avoid sharp bends and maintain a bend radius of at least 50mm.

What's in the Box

• 1x HPE 721064-B21 40Gb QSFP+ to 4x10Gb SFP+ 3M DAC Cable