Rx and Tx pairs auto routing

I want to have the routing of these signals as listed in the attachment with auto routing. How can I manage to do this? I added net labels to the nets but it is not recognized as pairs after adding _P and _N to the names.

I didn’t used routing differential pairs. But: Shouldn’t be _N and _P at the name end?

Either “P” and “N” or “+” and “-” should be at the end of the net names. In the PCB editor you also start routing a differential pair with the 6 hotkey and not with the x as for regular tracks.