Cisco SFP28 Passive Copper Cable - Direct attach cable - SFP28 to SFP28 - 2 m - twinaxial - SFF-8402/IEEE 802.3by - orange - for P/N: C9300-NM-2Y-RF, C9500-48Y4C-E-RF, N9K-C93180YC-FX-H, NCS-55A1-48Q6H, NCS-55A1-48Q6H=

Product Overview

AI-generated summary

This is a pretty straightforward “get the link up” item: a 2m passive twinax direct-attach SFP28 cable meant for specific Cisco line cards that already support that form factor. If you’ve got one of the listed Cisco platforms and you just need short-reach 100GbE handoffs to stay sane (especially in a top-of-rack scenario), £85.14 ex-VAT is reasonable. Passive DACs like this tend to be cheaper, lower power, and easier to deploy than optical optics when the distances are genuinely short.

That said, I wouldn’t buy it as a general-purpose SFP28 solution. These things are picky about compatibility and module/link partner behaviour—if the port doesn’t support passive DAC at that reach or the transceiver profile isn’t happy, you can end up wasting time with RMA-level troubleshooting. Also, 2m is not much: if your patching/patch panel layout forces longer runs, you’ll be better off pricing the right longer DAC or switching to optics rather than “hoping” it works.

**Who should buy:** you have a compatible Cisco switch/line card from the given part list, and the cable run is within a couple of meters. **Who should avoid:** anyone trying to use it across mixed vendors, unknown port configurations, or longer rack-to-rack paths where reach margin is tight.