VLANs on a router that isn't VLAN-aware cannot be configured properly.
VLANs on a router that isn't VLAN-aware cannot be configured properly.
To avoid routing between VLANs, you can use a DHCP server or assign static IP addresses within the VLAN that aren't linked to the router. Ubuntu offers options for routing, DHCP servers, or relay functionality—all straightforward to set up with some research. Think of VLANs as virtual LANs, functioning as entirely separate networks that depend on their own services to operate.
You could assign DHCP for internet-connected devices through the router and static IPs for non-internet devices, or configure them manually.