Comment 3 for bug 1750330

Having set:
enable_neutron_provider_networks: "yes"
enable_neutron_dvr: "no"

Makes br-ex configured in all-in-one

# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000
    link/ether 52:54:00:6a:92:9c brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP mode DEFAULT qlen 1000
    link/ether 52:54:00:4f:13:a9 brd ff:ff:ff:ff:ff:ff
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT
    link/ether 02:42:1e:f1:b3:a2 brd ff:ff:ff:ff:ff:ff
5: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
    link/ether d6:45:54:f3:e5:4e brd ff:ff:ff:ff:ff:ff
11: br-ex: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
    link/ether 0a:2e:8d:bc:2a:42 brd ff:ff:ff:ff:ff:ff
12: br-int: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
    link/ether 9e:35:a2:99:39:44 brd ff:ff:ff:ff:ff:ff
13: br-tun: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
    link/ether ea:63:29:1e:02:40 brd ff:ff:ff:ff:ff:ff