[root@network network-scripts]# cat ifcfg-ens32      (management network)
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME=ens32
UUID=92874c35-c2bb-4760-b80f-7e5b73ac8bcb
ONBOOT=yes
HWADDR=00:0C:29:D4:D6:E0
IPADDR0=192.168.10.21
PREFIX0=24
GATEWAY0=192.168.10.254
DNS1=192.168.10.254
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes

[root@network network-scripts]# cat ifcfg-ens33     (instance tunnel network)
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME=ens33
UUID=fdf35c69-a504-4553-8b80-8529f2c053ea
ONBOOT=yes
HWADDR=00:0C:29:D4:D6:EA
IPADDR0=192.168.20.21
PREFIX0=24
GATEWAY0=192.168.20.254
DNS1=192.168.20.254
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes

[root@network network-scripts]# cat ifcfg-br-ex     
DEVICE=br-ex
BOOTPROTO=none
HOTPLUG=no
GATEWAY=192.168.30.254
IPADDR=192.168.30.1
NETMASK=255.255.255.0
ONBOOT=yes
TYPE=OVSIntPort
OVS_BRIDGE=br-ex
USERCTL=no
DEVICETYPE=ovs
DNS1=192.168.30.254

[root@network network-scripts]# cat ifcfg-ens34
DEVICE=ens34
TYPE=OVSPort
DEVICETYPE=ovs
OVS_BRIDGE=br-ex
UUID=91d9382d-2d7d-4af3-845f-25671ab01876
ONBOOT=yes
HWADDR=00:0C:29:D4:D6:F4
NETBOOT=yes
IPV6INIT=no
BOOTPROTO=none
NAME=ens34