centos下设置网桥

1、设置网卡

vi /etc/sysconfig/network-scripts/ifcfg-br0
DEVICE=br0
TYPE=Bridge
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=10.0.0.10
NETMASK=255.255.255.0
GATEWAY=10.0.0.254
DNS1=8.8.8.8
IPV6INIT=no
USERCTL=no

vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
HWADDR=BC:30:5B:CB:30:3F
TYPE=Ethernet
UUID=e513c376-2c85-45a7-92ba-d14ca2225e69
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=no
#IPADDR=10.0.0.10
#NETMASK=255.255.255.0
#GATEWAY=10.0.0.254
#DNS1=192.168.1.250
#DNS2=192.168.1.251
#IPV6INIT=no
USERCTL=no
BRIDGE=br0

此步也可以这样设置网桥br0:

1. # brctl addbr br0

2. # ip addr add 10.0.0.10/24 dev br0

3. # ip link set dev br0 up

2、关闭 NetworkManager

chkconfig NetworkManager off
service NetworkManager stop

3、重启网络

service network restart

4、查看网桥

[root@localhost ~]# brctl show
bridge name   bridge id          STP enabled     interfaces
br0         8000.0050562539b9     no            ens33

命令：brctl
brctl --help
Usage: brctl [commands]
commands:
    addbr                 add bridge
    delbr                 delete bridge
    addif             add interface to bridge
    delif             delete interface from bridge
    setageing             set ageing time
    setbridgeprio            set bridge priority
    setfd                 set bridge forward delay
    sethello              set hello time
    setmaxage             set max message age
    sethashel             set hash elasticity
    sethashmax            set hash max
    setmclmc              set multicast last member count
    setmcrouter            set multicast router
    setmcsnoop            set multicast snooping
    setmcsqc              set multicast startup query count
    setmclmi              set multicast last member interval
    setmcmi               set multicast membership interval
    setmcqpi              set multicast querier interval
    setmcqi               set multicast query interval
    setmcqri              set multicast query response interval
    setmcqri              set multicast startup query interval
    setpathcost        set path cost
    setportprio        set port priority
    setportmcrouter        set port multicast router
    show          [ ]        show a list of bridges
    showmacs              show a list of mac addrs
    showstp               show bridge stp info
    stp           {on|off}    turn stp on/off
常用：
1.创建网桥设备：brctl addbr ，eg：brctl addbr  br0
2.向网桥设备添加物理网卡：brctl addif ，eg：brctl  addif  br0 eth0
3.从网桥中删除网卡：brctl delif ，eg：brctl  delif  br0 eth0
4.删除网桥：brctl delbr ，eg：brctl delbr br0
5.查看网桥配置情况：brctl show