Comment 52 for bug 1860926

bionic:

ubuntu@lp1860926-b:~$ dpkg -l systemd|grep systemd
ii systemd 237-3ubuntu10.42 amd64 system and service manager
ubuntu@lp1860926-b:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
    link/ether 52:54:00:12:e3:55 brd ff:ff:ff:ff:ff:ff
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 52:33:41:0a:a0:6d brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.4/24 brd 192.168.122.255 scope global br0
       valid_lft forever preferred_lft forever
    inet6 fe80::5033:41ff:fe0a:a06d/64 scope link
       valid_lft forever preferred_lft forever
ubuntu@lp1860926-b:~$ sudo ip l set dev ens3 nomaster
ubuntu@lp1860926-b:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
    link/ether 52:54:00:12:e3:55 brd ff:ff:ff:ff:ff:ff
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 52:33:41:0a:a0:6d brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.4/24 brd 192.168.122.255 scope global br0
       valid_lft forever preferred_lft forever
    inet6 fe80::5033:41ff:fe0a:a06d/64 scope link
       valid_lft forever preferred_lft forever