A network connects more network segments. A software bridge behaves like a virtual network switch to which any physical or virtual devices can be connected.
1.Adding a bridge.
#brctl addbr br0
Check the bridge status.
#brctl show | grep br0 br0 8000.000000000000 no
2.Create a configuration file for the bridge and add enp9s0 to it.
# brctl addif br0 enp9s0 Configuration for enp9s0 $ cat /etc/sysconfig/network-scripts/ifcfg-enp9s0 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=enp9s0 UUID=dafcc998-f948-39e5-9d0a-041dd2188707 ONBOOT=yes AUTOCONNECT_PRIORITY=-999 DEVICE=enp9s0 #IPADDR=192.168.15.15 #PREFIX=20 #GATEWAY=192.168.0.4 IPV6_PRIVACY=no DNS1=4.2.2.2 DNS2=8.8.8.8 DOMAIN=server.sand.box ZONE= BRIDGE=br0
Configuration for br0
DEVICE="br0" ONBOOT=yes TYPE=Bridge BOOTPROTO=static IPADDR=192.168.15.15 NETMASK=255.255.255.240 BROADCAST=192.168.15.255 STP=no PROXY_METHOD=none BROWSER_ONLY=no PREFIX=28 GATEWAY=192.168.0.4 DNS1=4.2.2.2 DNS2=8.8.8.8 DEFROUTE=yes IPV4_FAILURE_FATAL=no IPV6INIT=no NAME="br0" UUID=d2d68553-f97e-7549-7a26-b34a26f29318
#check bridge
#brctl show | grep br0 br0 8000.001c2301fbdc no enp9s0
###additionally you can add gateway in /etc/sysconfig/network
GATEWAY=192.168.0.4