Can't detect Synology DS920+ behind unmanaged switch Zyxel MG-105

I’ve installed the 2.5Gbps driver for DS920+ to use with 2.5Gbps Plugable Ethernet Adapter.

When I connect NAS directly to the switch, my PC on the same switch can see it and open DSM on the NAS. NAS also appears in the Device List in the router.

Whenever I connect NAS via Plugable Ethernet Adapter to Switch, NAS vanished from the Device List in the router. The LED of RJ45 shines, and the LED of Switch shines with the color of 2.5Gbps speed. But strangely, when I run, it can see the IP of the NAS but other details are unavailable, and I couldn’t connect to it.

I feel like maybe I’m missing some settings, but I don’t have any clue.

So now, Plugable Ethernet Adapter doesn’t work for me.

Thanks so much for your help.

Hello Stephen,

Thanks for contacting us and welcome to our forums! Sorry to hear about these issues with your 2.5Gbps Plugable Ethernet Adapter and I can certainly help investigate this. I would recommend to contact us directly to our support email, we can take a deeper look at log files and provide further guidance.

Please visit our contact page and you can reference ticket 386094 in your email,

I would also suggest to run our log troubleshooting tool “Plugdebug” that helps us find out what is going on in situations like this. Please plug the device into your computer, then go to this page and follow the instructions there:

I hope to hear from you soon!


Product Owner
Plugable Support

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