centos7 桥接网卡

1.新增桥接网卡br0

nmcli c add type bridge autoconnect yes con-name br0 ifname br0 

2.建立连接

echo 'BRIDGE="yes"' >> /etc/sysconfig/network-scripts/ifcfg-eno1

3.重启

reboot

4.查看状态 ip a

1: lo:  mtu 65536 qdisc noqueue state UNKNOWN 
    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: eno1:  mtu 1500 qdisc mq master br0 state UP qlen 1000
    link/ether 08:94:ef:05:be:e8 brd ff:ff:ff:ff:ff:ff
3: eno2:  mtu 1500 qdisc mq state DOWN qlen 1000
    link/ether 08:94:ef:05:be:e9 brd ff:ff:ff:ff:ff:ff
4: eno3:  mtu 1500 qdisc mq state DOWN qlen 1000
    link/ether 08:94:ef:05:be:ea brd ff:ff:ff:ff:ff:ff
5: eno4:  mtu 1500 qdisc mq state DOWN qlen 1000
    link/ether 08:94:ef:05:be:eb brd ff:ff:ff:ff:ff:ff
6: enp0s20u1u5:  mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 0a:94:ef:05:be:ef brd ff:ff:ff:ff:ff:ff
7: br0:  mtu 1500 qdisc noqueue state UP 
    link/ether 08:94:ef:05:be:e8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.206/24 brd 192.168.0.255 scope global dynamic br0
       valid_lft 3155sec preferred_lft 3155sec
    inet6 fe80::a94:efff:fe05:bee8/64 scope link 
       valid_lft forever preferred_lft forever
8: virbr0:  mtu 1500 qdisc noqueue state DOWN 
    link/ether 52:54:00:75:90:d1 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
9: virbr0-nic:  mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 500
    link/ether 52:54:00:75:90:d1 brd ff:ff:ff:ff:ff:ff