Cisco QSFP28 to 4 x SFP28 Passive Copper Breakout Cable, 3 m

One high-speed port feeding four slower servers is the job of the Cisco QSFP28 to 4 x SFP28 Passive Copper Breakout Cable, part number QSFP-4SFP25G-CU3M. A single QSFP28 connector at 100GbE splits into four SFP28 legs, each intended for a 25GbE port, and the assembly is 3 m long.

Breakout cables save switch ports and transceivers. Instead of using four separate links from four switch ports, one QSFP28 port serves four SFP28 devices through one cable. That suits top-of-rack designs where several servers sit close to the switch.

Because the cable is passive copper, there are no optics inside the connectors, and the reach is limited to the 3 m rating. Measure the distance from the switch port to the furthest server port, including slack, before ordering.

The QSFP28 end must match a switch port that supports breakout mode, which is a platform setting, so check your switch documentation. The SFP28 ends fit ports on server adapters rated for 25GbE.

The QSFP-4SFP25G-CU3M is offered new, refurbished and used. New and refurbished cables carry 1 year or 3 years of warranty, and used cables carry 90 days. Send your quantity and host platforms with your request.