VLAN can be set up on both the virtual machines and on bridges. If the VLAN traffic leaves a virtual environment, it is important for each switch and physical network device to be VLAN-aware and tagged properly. Tagging VMs with the VLAN ID is very straightforward through the Proxmox GUI. Just enter the VLAN ID during the addition of a network interface to a VM or edit the already added vNICs. The following screenshot shows a virtual interface for a VM after it was tagged with a VLAN ID:
In the previous example, we have tagged the interface for VLAN ID 1. This tagging works when the bridge has the VLAN-aware option enabled, or ...
