I'm trying a new configuration in which I need to get specific tagged vlans from an interface (eth2) into a gre tunnel interface (tun0) with gre-bridge encapsulation type.
I don't want to bridge the physical interface with the vlans on it directly to the tunnel interface, because I don't want all vlans to pass through the tunnel, just certain ones. Most specificlally, I'd like to prevent untagged traffic on eth2 from passing through the tunnel.
I can't make vif subinterfaces on tun interfaces, otherwise this would be easy.
Is this possible?