Juniper allows for auto negotiation to be turned off:
but I agree what’s normal or not isn’t clear. Throw 10Gb-T in and it’s less clear.
The issue is that the port goes down when the attached device fully boots up. I have no access to the device but the vendor has asked that I turn off negotiation. I can and have but there is no difference in output when I do. Ultimately I’m looking for something I can send back to them that indicates negotiation status.