Comment 11 for bug 1860926

If that help here is my netplan setup that was working perfect in 18.04, 19.04, 19.10

network:
  version: 2
  renderer: networkd
  ethernets:
    enp0s31f6:
      dhcp4: false
      dhcp6: false
      match:
        macaddress: 1c:1b:0d:61:85:40
      mtu: 9000
    enp12s0f0:
      dhcp4: false
      dhcp6: false
      match:
        macaddress: 00:1b:21:66:6c:c8
      mtu: 9000
    enp2s0:
      addresses:
      - 192.168.2.1/24
      dhcp4: false
      dhcp6: false
      match:
        macaddress: 00:17:b6:00:97:8a
      mtu: 9000
  vlans: {}
  wifis: {}
  bonds:
    bond0:
      interfaces: [enp0s31f6, enp12s0f0]
      mtu: 9000
      parameters:
        lacp-rate: slow
        mode: 802.3ad
        transmit-hash-policy: layer2+3
  bridges:
    br1:
      link-local: [ ]
      addresses: [ 192.168.1.166/24 ]
      dhcp4: false
      dhcp6: false
      gateway4: 192.168.1.1
      interfaces: [ bond0 ]
      nameservers:
        search: [maison.com]
        addresses: [192.168.1.11, 192.168.1.12, 1.1.1.1]