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Forum Discussion

cartossin's avatar
cartossin
Aspirant
Sep 16, 2025

XS505m will not start with DAC cable inserted

When I have a DAC cable linking my XS505m with my ubiquiti switch, it does not boot. All the lights go solid and it doesn't do anything. The workaround is you unplug the cable, start the switch, then insert it, then it works fine.

 

Is there a supported DAC cable I can buy? I've tried 3 different ones. (though 2 might be a rebranding of the same 10gtek one). The one I have claims netgear support.

2 Replies

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User

    Are you needing a SFP to Ethernet or SFP to Fiber adapter or actual SFP to SPF DAC cable? 

    Does the switch with with out the DAC connected? 

    Is the DAC cable connected to something else or just only inserted in to the XS switch? 

    What is the other device that the DAC would be connected too?

     

    I'll take a look what what I put in my XS505m, I believe it's a 10Gtek SFP to Ethernet 10Gb adapter the one I got from here:

    https://www.amazon.com/dp/B01KFBFL16

     

    Switch has been working great since day one for me.

     

    But I had also got a Cable Matters and one other. I can't remember which on is currently installed since I got it a few years ago. So I'll take a look.

     

    Just wondering if you power OFF the switch, remove the SFP device, power ON the switch and let it come to ready, then insert the SFP device in the port, does the switch work or something happen? 

     

     

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