StarTech.com Cisco SFP-H10GB-CU6M Compatible 6m 10G SFP+ to SFP+ Direct Attach Cable Twinax - 10GbE SFP+ Copper DAC 10 Gbps Low Power Passive Mini GBIC/Transceiver Module DAC Firepower ASR9000 ASR1000

Product Overview

AI-generated summary

At £22 ex‑VAT for a 6m 10GbE copper DAC, this is solid value *if* you’re absolutely sure your interfaces will play nicely. In the real world, passive DACs like this are the cheapest “it just works” way to get 10GbE short‑reach connectivity between compatible switches/servers—no power bricks, no fuss, and generally very predictable latency. If you’re trying to link two bits of kit in a rack or between adjacent racks, this is the kind of purchase that saves budget without causing drama.

The main “don’t buy” scenario is compatibility risk. Even though it’s marketed as “Cisco compatible,” SFP+/DAC interoperability can be finicky depending on the exact model/firmware and what optics/copper IDs your gear expects. If you’re rolling into production and can’t afford a refusal to link, spend a little more time testing with your specific devices (or buy from a vendor with very clear compatibility support/returns). If you’ve got intermittent link issues or the ports refuse to come up, you’ll wish you’d picked a part number guaranteed for your exact hardware.

Who it’s for: MSPs and resellers standardising rack-to-rack or server-to-switch 10GbE cabling where distance is within reason and the partner devices are known to accept 3rd‑party DACs. Who should skip it: environments that require guaranteed optics compatibility on day one, or anything where you can’t quickly verify link/firmware behaviour.