root@openstack-controller:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    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: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:50:56:8d:a0:f9 brd ff:ff:ff:ff:ff:ff
    inet 129.94.72.51/24 brd 129.94.72.255 scope global ens160
       valid_lft forever preferred_lft forever
    inet 129.94.72.52/32 scope global ens160
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:fe8d:a0f9/64 scope link
       valid_lft forever preferred_lft forever
3: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:50:56:8d:43:7c brd ff:ff:ff:ff:ff:ff
    inet 10.1.0.11/16 brd 10.1.255.255 scope global ens192
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:fe8d:437c/64 scope link
       valid_lft forever preferred_lft forever
4: ens224: <BROADCAST,MULTICAST> mtu 1500 qdisc noop master ovs-system state DOWN group default qlen 1000
    link/ether 00:50:56:8d:9a:f4 brd ff:ff:ff:ff:ff:ff
5: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:f3:c3:1b:27 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 scope global docker0
       valid_lft forever preferred_lft forever
6: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1
    link/ether 8a:d2:14:cf:c7:7b brd ff:ff:ff:ff:ff:ff
7: br-ex: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1
    link/ether 00:50:56:8d:9a:f4 brd ff:ff:ff:ff:ff:ff
8: br-int: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1
    link/ether de:03:cd:f2:61:4a brd ff:ff:ff:ff:ff:ff
9: br-tun: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1
    link/ether ee:20:95:19:30:47 brd ff:ff:ff:ff:ff:ff
13: vxlan_sys_4789: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 65485 qdisc noqueue master ovs-system state UNKNOWN group default qlen 1000
    link/ether a2:2c:a8:3a:a1:3d brd ff:ff:ff:ff:ff:ff
    inet6 fe80::a02c:a8ff:fe3a:a13d/64 scope link
       valid_lft forever preferred_lft forever
root@openstack-controller:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto ens160
iface ens160 inet static
        address 129.94.72.51
        netmask 255.255.255.0
        network 129.94.72.0
        broadcast 129.94.72.255
        gateway 129.94.72.1
        # dns-* options are implemented by the resolvconf package, if installed
        dns-nameservers 8.8.8.8
        dns-search localdomain

auto ens192
iface ens192 inet static
        address 10.1.0.11
        netmask 255.255.0.0
        network 10.1.0.0
        broadcast 10.1.255.255
        # gateway 129.94.72.1
        # dns-* options are implemented by the resolvconf package, if installed
        # dns-nameservers 8.8.8.8
        # dns-search localdomaini

root@openstack-controller:~# ifup ens224
Unknown interface ens224
root@openstack-controller:~#