I have configured multiple Vlan under a single interface. For operations need we have to change two Vlan, so i have just changed the Vlan id and name only other all information like IP address, route all are unchanged. After applying the configuration now i am seeing four Vlan. Two old vlan and two new vlan.
N.B. I have just changed the Vlan ID 244,242 with 254,252
When you remove an interface completely from your netplan config, netplan (or specifically, networkd) can no longer distinguish between a removed config and an interface that you have manually configured outside of netplan. You can remove the no-longer-used vlans manually at runtime from the command line after applying the netplan config, or you can reboot the system to get a clean network state.
