Hi wirseefahrer
Good day!!
Doing research I was only able to find this:
Starting in Junos OS Release 18.1R2, the multi-rate speed is supported on EX2300-48MP and EX2300-24MP switches. The speed configuration statement is supported on both multi-rate gigabit ethernet interface (mge) and gigabit ethernet (ge) interface. The mge interface is a rate-selectable (multirate) Gigabit Ethernet interface that can support speeds of 10-Gbps, 5-Gbps, and 2.5-Gbps over CAT5e/CAT6/CAT6a cables. In the EX2300, the mge interface supports 100-Mbps, 1-Gbps, and 2.5-Gbps speeds, which can be configured by using the speed configuration statement. Note that 10Mbps speed is supported only on ge interfaces of EX2300 switch.
https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/speed-edit-interfaces-ethernet.html#jd0e47
The link is mot referring to the uplink ports, but only the standard ports. I reserved a automation device that is running 18.1R2 and I was not able to find the speed command either so, this might be a limitation with this device.
with the show chassis hardware:
PIC 1 REV 07 650-078097 XP3119130027 6x1G/10G SFP/SFP+
Please mark "Accepted Solution" if this helps.
Kudos are always appreciated
Thanks
Suraj