/etc/sysconfig/network-scripts/ifcfg-cloudbr0
DEVICE=cloudbr0
TYPE=Bridge
ONBOOT=yes
BOOTPROTO=static
IPV6INIT=no
IPV6_AUTOCONF=no
DELAY=5
IPADDR=192.168.1.50
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
DNS1=192.168.1.1
DNS2=8.8.4.4
DNS3=8.8.8.8
DNS4=1.1.1.1
STP=yes
USERCTL=no
NM_CONTROLLED=no

/etc/sysconfig/network-scripts/ifcfg-enp2s0
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
NAME=enp2s0
DEVICE=enp2s0
ONBOOT=yes
BRIDGE=cloudbr0
UUID="740fc662-1d75-42ae-98ed-0ce92a0ca3dc"


original content of ifcfg-enp2s0 (non-bridge)
TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="enp2s0"
UUID="740fc662-1d75-42ae-98ed-0ce92a0ca3dc"
DEVICE="enp2s0"
ONBOOT="yes"
IPADDR="192.168.1.50"
PREFIX="24"
GATEWAY="192.168.1.1"
DNS1="192.168.1.1"
DNS2="8.8.4.4"
DNS3="8.8.8.8"
DNS4="1.1.1.1"
IPV6_PRIVACY="no"