Hi @fw61,

You may need to adjust the speed/duplex settings on the SFP+ port used to match the client.  I thought the ports were defaulted to 10G/Full, so if your client doesn't support that speed this may be the issue.

Side note: The copper modules can generate a bit of extra heat so make sure you have adequate cooling. If both are installed and one/both randomly stops working until it's reseated, it may be heat related.  The dual SFP+ slots in your switch do not appear to be as tightly packed as the quads, so maybe it won't be an issue. DAC cables are a better option if they can be used.

  @D-C 

Thank you for replying.

Looking at the module specs, it does advertise being able to handle from 10G to 1000Mbps. It could be that my devices (RPi 5/Orange Pi 5) are just limit, although they use 1000Mbps on the regular interfaces. I don't see a way to set the module speed in the GUI (CLI maybe?)  In any case I will get my router soon and it should handle 2.5G I'll check then. I am using short Cat 8 cable... that should work.

Cheers

  @D-C 

That was it..... Thank you!