Just for the sake of interest. Problem only occurring using default Windows RDP client. Using Remmina from Ubuntu works just fine.

You should configure it as: set switch1-cpu vlan-header=leave-as-is vlan-mode=secure So instead of: /interface ethernet switch port set switch1-cpu vlan-header=leave-as-is vlan-mode=secure I used: /interface ethernet switch port set switch1-cpu vlan-header=add-if-missing vlan-mode=secure Both trunk...

Which model do you have, RB450G or RB450Gx4? Two different chips and needs to be configured differently RB450G with Atheros8316. Can you provide some hint regarding "needs to be configured differently"? I have another router with Atheros 8327 which running just fine. But can't find anywhe...

What exactly do you mean by "I can't connect to the desired network through it."? Is this the complete export? Why is there a second bridge (though not related)? Can you also share the config of the CRS354? There are DHCP servers + couple of virtual servers on each VLAN. Can't get the IP ...

What RouterOS version and firmware are you running?

both 7.4.1

Configuration seems fine to me. Did you try to cold-boot device after changing configuration of VLANs? I seem to remember rare cases where configuration did not apply properly after change in ROS and (oddly enough) did not apply at warm boot (reboot). Cold boot (power off, disconnect power for a fe...

I have vlan-header=leave-as-is on switch1-cpu. It's the default value so not showing in my config export.

Hello there, I successfully running RB450 router with VLAN config. Ether4 port is a trunk port which is working fine (connected to CRS354). Now I wanted to use another port (ether3) on RB450 as access port to one of the VLANs. Unfortunately, i can't connect to the desired network through it. /interf...