Bingo600 Thanks for the help but the forum won't let me post

That’s not nice …
We’re refering to this

Well try the last command , and if that is not working …
It’s smelling a bit of hardware.

I’d try to swap the ether cables …
But swap them in the PC end if possible.

Aka … Plug cable from Desktop end into Linux end , and viceversa.

10Gb is putting a lot of stress on the cables, and needs quality … Not barbed wire