ubuntu@node-1:~$ cat /etc/network/interfaces
iface eth0 inet manual
auto juju-br0
iface juju-br0 inet static
gateway 10.20.19.2
address 10.20.19.101/24
mtu 1500
bridge_ports eth0
up ip link set eth0 up
pre-up ip link add dev eth0 name juju-br0 type bridge || true
auto eth0.100
iface eth0.100 inet static
address 10.100.19.101/24
vlan-raw-device juju-br0
up ip link set juju-br0 up
mtu 1500
vlan_id 100
auto eth0.50
iface eth0.50 inet static
address 10.50.19.101/24
vlan-raw-device juju-br0
up ip link set juju-br0 up
mtu 1500
vlan_id 50
dns-nameservers 10.10.19.2
dns-search maas-19