Netplan Bonding

Netplan example

network:
  version: 2
  renderer: networkd
  bonds:
    bond0:
      dhcp4: yes
      interfaces:
        - enp3s0
        - enp4s0
      parameters:
        mode: active-backup
        primary: enp3s0

network:
  version: 2
  renderer: networkd
  bonds:
    bond0:
      interfaces:
        - ens3f0
        - ens3f1
      parameters:
        mode: active-backup
        primary: ens3f0

https://netplan.io/examples