Hi @pete,
Well done on your progress with the vlan. Always wise to do any major changes in the config files with a VM clone. That way you can always go back to your starting point without a full re-install.
Yes they are additional zones but linked to the same parent zone and hence NIC. Therefore they are additional VLAN’s on the original parent zone. They can be called what you want as mentioned in @hvacguy thread. Parent is green and the additional zones can be called green1 green2 green3 etc or brown, purple, khaki, or any names.
At least the above is my understanding but I have never done this myself. I only needed single vlan id’s on each of my IPFire interfaces as I have 4 NICs.
Maybe someone else who has created multiple vlan’s per zone interface can provide some input.