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] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1860926 Title: Ubuntu 20.04 Systemd fails to configure bridged network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1860926/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs