I have problem with SFP-T modules in EX2300 uplink ports.
They are properly detected in chassis hardware with a name and s/n but the logical link is down so I can't pass any traffic throught it.
Weird thing is that the link on other side in EX2200 physical port comes up when I connect the cable and it blinks as it were passing some traffic but on EX2300 uplink side the LEDs for power and traffic are off.
I have a batch of SFP-T modules (non-Juniper but programmed for it) which works till you reboot the switch after which you need to re-attach them physically to make them function properly.
I have original SFP-T modules and few other from different vendors and even those programmed for Cisco. All of them are working fine with older hardware EX2200/EX3300 but not on ELS hardware EX2300/EX3400.
Maybe someone stumbled on this problem and solved it as I don't really have any idea why this happens and how to solve this.
I will try to install 18.1R3-S3 as by KB it fixes some problems with EX2300 and maybe it will work with SFP-T.
I wanted to make it run on 18.4R1 cause from this version dhcp snooping and private vlans are working but I think the version is problem as in a mean time I downgraded to 15.1X53-D590 and SFP-T started working.
Thanks for that PR link but it's a bit missleading cause it states that the issue is resolved in 18.4R1 which I can for sure say it isn't.
BTW, I have a few SFP-T and done all things I can imagine on them as disabling auto-negotiation on both end, on one of them, putting speeds to 1g and full-duplex and nothing worked.