Hello,
The Switch is Advertising 100M FD with POE.
One RBD22UGS-5HPacD2HnD is connected to the CRS112-8P-4S at Port 3. The Switch is powered with an 48V PS.
What is the export of the command interface/ethernet/print detail where name=ether3
What is the question?
You are so correct on that 
... I just guessed that probably the question is why there is no 1gbps advertising from the RBD22UGS
Flags: X - disabled, R - running; S - slave
0 RS ;;; AP-Dach
name=“ether3” default-name=“ether3” mtu=1500 l2mtu=1588
mac-address=2C:C8:1B:D1:37:AE orig-mac-address=2C:C8:1B:D1:37:AE
arp=enabled arp-timeout=auto loop-protect=default
loop-protect-status=off loop-protect-send-interval=5s
loop-protect-disable-time=5m auto-negotiation=yes
advertise=10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full
full-duplex=yes tx-flow-control=off rx-flow-control=off speed=1Gbps
bandwidth=unlimited/unlimited switch=switch1 poe-out=auto-on
poe-voltage=auto poe-controller=“samd20” poe-priority=10
power-cycle-ping-enabled=no power-cycle-interval=none
Distance between crs and RBD22UGS ?
1m. I tried 2 Cables.
What i can see from your picture is that the RBD22UGS does not advertise 1000M…
But on your export it shows that it does advertise 1000M.
Did you try to reset, if possible, the RBD22UGS and check again ?
do not use print (and you have “print” only one side), put the results of
/interface ethernet export
on both devices (remove serial number before put on forum)
model = CRS112-8P-4S
/interface ethernet
set [ find default-name=ether3 ] comment=AP-Dach
set [ find default-name=ether5 ] comment=Lora
set [ find default-name=ether6 ] comment=Telefon
set [ find default-name=ether7 ] comment=PC poe-out=off
set [ find default-name=sfp9 ] disabled=yes
set [ find default-name=sfp10 ] disabled=yes
set [ find default-name=sfp11 ] disabled=yes
set [ find default-name=sfp12 ] disabled=yes
set [ find default-name=ether8 ] comment=Uplink_Server name=uplink
/interface ethernet switch egress-vlan-tag
add tagged-ports=ether5,uplink vlan-id=20
\
model = RBD22UGS-5HPacD2HnD
/interface ethernet
set [ find default-name=sfp1 ] disabled=yes
add tagged-ports=ether5,uplink vlan-id=21
/interface ethernet switch vlan
add ports=ether3,ether5,uplink vlan-id=20
add ports=ether3,ether5,uplink vlan-id=21
Are you sure that is the export ?
Is like he mixed up the lines for no reason…
Yes that is exact the result from [admin@Hotspot4] > /interface ethernet export
Exact result?
I never see ether8 exported after sfp12 and “add tagged-ports” before /interface ethernet switch vlan
Do not joke us…
Ah, now is clear: you paste the export of the mantBOX between the lines of the export of 8P…
But I not see anything strange, try another port on 8P, if not work the ether1 of mantBOX probably is broken.
The mantbox for some reason does not advertise 1000M…
Did you try however to disable auto negotiation on both sides, and set the speed manually to 1000M full duplex, just for testing ?