CentOS bridge 配置：
1、创建br0配置文件
touch /etc/sysconfig/network-scripts/ifcfg-br0
2、修改bro配置文件
vi /etc/sysconfig/network-scripts/ifcfg-br0
DEVICE=br0
TYPE=Bridge
BOOTPROTO=static
IPADDR=0.0.0.0
ONBOOT=yes
3、添加网卡到网桥
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0 # 把eth0添加到网桥中
TYPE=Ethernet
BOOTPROTO=static
IPADDR=0.0.0.0
ONBOOT=yes
BRIDGE=br0
Ubuntu bridge配置：
root@ubuntu~#vim /etc/network/interfaces
auto lo eth0 eth1 br0
iface lo inet loopback
iface br0 inet static
address 10.10.10.1
netmask 255.255.0.0
gateway 10.10.10.254
pre-up ip link set eth0 promisc on #设置混杂模式
pre-up ip link set eth1 promisc on
pre-up echo "1">/proc/sys/net/ipv4/ip_forward #启用路由转发
bridge_stp off #关闭生成树
bridge_ports eth0 eth1
brctl 命令集
root@Openstack001:~# brctl
Usage: brctl [commands]
commands:
addbr add bridge
delbr delete bridge
addif add interface to bridge
delif delete interface from bridge
hairpin {on|off}turn hairpin on/off
setageing set ageing time
setbridgeprioset bridge priority
setfd set bridge forward delay
sethello set hello time
setmaxage set max message age
setpathcostset path cost
setportprioset port priority
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