Where is the missing piece of the puzzle?

I’m missing something here in my understanding and I’ve not managed to figure it out yet.

Setup;

Related conversations about this same topic at the different technology layers forums;

https://community.ui.com/questions/When-Do-Dont-VLAN-Tags-Get-Applied/cce6859a-1b7d-40d4-80f7-6b894fe3fe45

Feels like I’m missing a couple of pieces of the jigsaw to get this fully working. Feels like it’s something staring me in the face.

Any ideas?

I have a video covering pfsense and UniFI with VLAN setups for 2022. For XCP-NG just make sure the ports from the UniFi switch to the XCP-NG servers are set to “ALL” and then define the interfaces in XCP-NG with the proper VLAN tag to separate out the traffic.

I will make a new version (hopefully soon), but this is still relevant as to how VLANs work in XCP-NG