Comment 9 for bug 1959570

The fix from PR#336 seems to be working generally.

There's still a brief interruption of the network connectivity, while restarting the "snap.network-manager.networkmanager.service" daemon (obviously), but the SSH connection is recovered after a few seconds.

I've built a core22 base snap, using https://launchpad.net/~slyon/+archive/ubuntu/lp1959570 and a UC22 image out of this to run this test (all executed over an SSH connection):

slyon@ubuntu:~$ sudo snap set system system.network.netplan.network.bridges.br54.dhcp4=true
slyon@ubuntu:~$ sudo netplan get
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp0s2:
      dhcp4: true
  bridges:
    br54:
      dhcp4: true
slyon@ubuntu:~$ sudo snap set system system.network.netplan.network.bridges.br54.dhcp4=false
slyon@ubuntu:~$ sudo netplan get
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    enp0s2:
      dhcp4: true
  bridges:
    br54:
      dhcp4: false