NetworkManager and networkd different bridged outcome

[Trevor Rabie]

The following config:

network:
  version: 2
  renderer: networkd
  ethernets:
    enp0s31f6:
      dhcp4: no
  bridges:
    npbr0:
      interfaces:
        - enp0s31f6
      dhcp4: yes

produces the following expected outcome:

npbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
        inet 192.168.1.64 netmask 255.255.255.0 broadcast 192.168.1.255

enp0s31f6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
        ether 70:85:c2:72:83:25 txqueuelen 1000 (Ethernet)
        RX packets 12244805 bytes 11369274561 (11.3 GB)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 24490862 bytes 31660043085 (31.6 GB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
        device interrupt 16 memory 0xdf100000-df120000

HOWEVER, changing the renderer to NetworkManager does not correctly bind enp0s31f6 to the bridge npbr0. enp0s31f6 is allocated the IP of 192.168.1.64 and not the bridge.