Cisco 100GBASE-CR4 QSFP28 Passive Copper Direct Attach Cable, 5 m

At 5 m, the Cisco 100GBASE-CR4 QSFP28 Passive Copper Direct Attach Cable, part number QSFP-100G-CU5M, is a long run for passive copper at 100GbE. QSFP28 connectors on both ends, passive construction and a 100GbE rating are the basics of this cable.

Five meters reaches between racks that are a short distance apart, or across a rack where the switch and server sit far from each other. Beyond that, copper at 100GbE runs out of range, and optical cables or fiber modules take over.

Why choose copper at all? A direct attach cable has no separate transceivers to buy and is often the lowest-cost way to build a short link. The cost of that simplicity is that the cable is a fixed length, so measure the route, including slack, before ordering.

Also confirm your devices accept this cable, since some platforms check the cable's identity and refuse others.

The QSFP-100G-CU5M is offered new, refurbished and used. New and refurbished cables come with 1 year or 3 years of warranty, and used cables come with 90 days. Send us your quantity and the host platforms when you request pricing.