@Virgo 

Hello, I don't want to delete the default VLAN. All I want is to create a subnet in a router port where I can attach an unmanaged switch. The hosts attached to that switch should receive their IPs via DHCP.

I also have a managed switch on a different port and it works well with a different subnet.

My understanding is that changing the PVID to a non default value is to treat untagged traffic as if it belongs to that VLAN. I used this router configured in that manner without Omada and it worked quite well. The problem began when I switched to the Omada Controller.

  @Virgo 

I've attached my current settings.

Since you asked for a ipconfig output and it's a dual boot machine, I logged into Windows. My surprise is that it worked!

Now, this doesn't make sense, when I use linux it doesn't work but it does on Windows. Keep in mind that is the same machine, same interface, the only change is the OS.

I've attached the ifconfig, ipconfig and ping on both OSs.

  @justcurious 

I double checked that it's not a Linux configuration issue. It's in automatic DHCP.

If I switch PVID back to 1, linux works fine but in the LAN network rather than in the Oficina Network.

  @Virgo 

I just tried Fedora instead of Debian on a different hardware and had the same issue.

I tried a Windows VM inside a Linux host and it worked!

There shouldn't have to be a difference between Linux and Windows.