Linux 双网卡桥接模式配置

目的：用作交换机

1. 安装桥工具bridge-utils
   sudo apt-get install bridge-utils
2. 打开IP转发，这是共享上网的必要条件
   echo “1” > /proc/sys/net/ipv4/ip_forward
3. 添加一个桥接连接
   brctl addbr br0
   将eth0 eth1加到网桥中去

   ifconfig eth0 0.0.0.0 up
   ifconfig eth1 0.0.0.0 up
   brctl addif br0 eth0
   brctl addif br0 eth1

4. 修改文件/etc/network/interfaces

   # interfaces(5) file used by ifup(8) and ifdown(8)
   # Include files from /etc/network/interfaces.d:
   source-directory /etc/network/interfaces.d
   auto lo br0
   iface lo inet loopback
   iface eth0 inet manual
   iface eth1 inet manual
   iface br0 inet static
   bridge_ports eth0 eth1
   address 192.168.1.127
   broadcast 192.168.1.255
   #network 192.168.1.0
   netmask 255.255.255.0
   gateway 192.168.1.1

5. 使能桥接连接

   sudo ifconfig bridge0 up

6. 重启

   sudo reboot