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slarkins
slarkins
New Member
October 13, 2021
Solved

TWINAX/DAC Cable Compatibility FS-124F / FS-148F

  • October 13, 2021
  • 1 reply
  • 5175 views

I need to connect my FS-124F or FS-148F Switch to a Broadcom 57416 SFP+ Network card. This will be for a future server purchase but i currently have servers at my location using the same NIC which has an open SFP+ port (the other is using a Dell twinax/Dac cable connecting back to a Dell switch) and want to test with a spare FS-148F ahead of my project start. I have tried 2 different aftermarket Twinax/Dac cable brands with no luck linking. One was 7m and other was 5m . Has anyone had any luck with a particular aftermarket DAC cable to link between the FS-124F or FS-148F with the Broadcom network card? I know FOrtinet lists a 7m DAC cable but not sure if those are just to interconnect Fortinet switches or they are generic enough to connect to Broadcom nic...plus the Fortinet branded cables are outrageously expensive...

    Best answer by ac1

    I don't have experience, but have you tried to set the speed of the interface to 10000auto or 10000full?

    It seems possible to be a negotiation problem.

    1 reply

    ac1
    ac1Answer
    Explorer III
    October 26, 2021

    I don't have experience, but have you tried to set the speed of the interface to 10000auto or 10000full?

    It seems possible to be a negotiation problem.

    slarkins
    slarkinsAuthor
    New Member
    October 26, 2021

    Thanks...yes...that was the problem..had to set NIC to 10000 full vs auto...i determined this a few days ago but failed to update this post

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