On 18.04, I have figured out how to get bonds, vlans, and bridges all working similarly to ifupdown. However, I am running a KVM server, and need the ability to add tagged vlan interfaces on the fly and bring them up individually without interrupting networking on the production box.
For example, ifup vlan123
However, it seems if I ran netplan apply to apply changes to yaml file, networking is interrupted to the server for at least 10-15 seconds. This would not bode well for production boxes.
Is there a way to add new vlans on the fly and bring them up without interrupting networking to the whole server?
Many thanks in advance.