How should I go about adding a new untagged vlan to a machine that is already deployed, since it seems like no new interfaces can be added after deployment?
First approach I thought of was adding a bridge that is attached to a physical interface or a bond but that is not possible due to the reason that deployed machines can’t get any new interfaces added.
The second approach that would actually work would be making a large number of bridges ahead of deployment and then changing vlans when required but this seems wrong.
So my final question is why is it not possible to add a new interface after deployment, if I can do it just by logging into the KVM and putting the new interface into netplan?