We have had an EX4300 VC with three switches for a while all running JUNOS 14.1X53-D42.3. an EX4600 Fiber switch was adeed (run JUNOS 14.1X53-D42.3) as well.
Ever since we added the EX4600 auto negotiate on the EX4300 copper ports will not work, nothing has changed except adding the EX4600. When a gig device is plugged in it works fine, when a 100m device is plugged in it will not work unless I run set interfaces ge-X/X/X speed 100m then the interfaces will come up. Before it was working.
I have opened a case with JTAC but that got no where other than them trying to blame all the devices on the other end (even though it's a mix of Copiers, Switches, Desktops, not just one type) they claim all these devices that worked before must not. Any ideas?