bridge-utils軟體包在RHEL7.7被棄用了，所以後面版本不能使用brctl命令。

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/deprecated_functionality

使用nmcli可以完成相同的功能：

1.建立網橋

1 nmcli conn add type bridge con-name br0 ifname br0

2.配置IP地址

1 nmcli connection modify br0 ipv4.addresses '192.168.11.8/24
 
' ipv4.gateway '192.168.11.254' ipv4.dns '114.114.114.114' ipv4.method manual

3.為網橋關聯物理介面

1 nmcli conn add type ethernet slave-type bridge con-name br0-ens192  ifname ens192  master br0
2 nmcli conn up br0

4.關閉乙太網卡的connection

1 nmcli conn down ens192

5.檢視物理網絡卡的橋接

1 [root@localhost ~]# bridge link show
 
2 2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 100
3 4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 master virbr0 state disabled priority 32 cost 100
4 7: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master virbr0 state forwarding priority 32
 
 cost 100

如需要恢復配置，執行如下命令。

1 nmcli conn up ens192
2 nmcli conn down br0
3 nmcli conn del br0
4 nmcli conn del br0-ens192