Hello, My css610-8g-2S+in gives me _SS error when connecting to its port. The device is not a PC or Laptop, but rather custom board with Ethernet card on it. What's interesting, any other device works fine on that port and same cato cable.
Also, I see RX errors on that port when connected (not much, 2-3 per day)

And one more thing - only 5 ports from 8 even discover the link. Not sure why again.

So I wonder what is the issue?

This is what is shows

I get __SO for a port connected to a PoE camera but the camera works fine. Have you tried replacing the cable? My device has been up for 7 days and have 0 for all interfaces on the errors page.