#!/bin/bash

interface1=`ls /sys/class/net|grep en|awk 'NR==1{print}'`

interface2=`ls /sys/class/net|grep en|awk 'NR==2{print}'`

interface_file1="/etc/sysconfig/network-scripts/ifcfg-$interface1"

interface_file2="/etc/sysconfig/network-scripts/ifcfg-$interface2"

br0_file="/etc/sysconfig/network-scripts/ifcfg-br0"

echo $interface_file1

echo $interface_file2

echo br0_file

while getopts "i:g:" opt; do

    case $opt in

        i)

            ip=$OPTARG

            ;;

        g)

            gateway=$OPTARG

            ;;

        \?)

            ;;

    esac

done

echo $ip

echo $gateway

function set_bridge(){

     #写网卡配置文件

     cat > "$br0_file" <<EOF

TYPE=Bridge

BOOTPROTO=static

DEVICE=br0

ONBOOT=yes

DNS1=114.114.114.114

IPADDR=$ip

PREFIX=

NETMASK=255.255.255.0

GATEWAY=$gateway

EOF

    cat > "$interface_file1" <<EOF

TYPE=Ethernet

BOOTPROTO=static

NAME=$interface1

DEVICE=$interface1

ONBOOT=yes

IPADDR=0.0.0.0

PREFIX=

BRIDGE=br0

EOF

    cat > "$interface_file2" <<EOF

TYPE=Ethernet

BOOTPROTO=static

NAME=$interface2

DEVICE=$interface2

ONBOOT=yes

IPADDR=0.0.0.0

PREFIX=

BRIDGE=br0

EOF

    systemctl restart network

 #检查ip地址是否设置成功

    res=`ip addr show br0 |grep -c "$ip"`

    if [ "$res" -eq  ];then

        echo "ip地址设置失败" >&

        return

    fi

#检查默认路由是不是gateway

    res=`ip route |grep -c "default\s*via\s*$gateway\s*dev\s*br0"`

    if [ "$res" -eq  ];then

        echo "网关设置失败" >&

        return

    fi

    return

}

    set_bridge

执行格式：

./set_bridge.sh -i 192.168.4.72 -g 192.168.4.1

结果：

[root@localhost ~]# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.4.72 netmask 255.255.255.0 broadcast 192.168.4.255
inet6 fe80::20e:c6ff:fec5:e66f prefixlen 64 scopeid 0x20<link>
ether 00:0e:c6:c5:e6:6f txqueuelen 0 (Ethernet)
RX packets 949676 bytes 188597922 (179.8 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 317931 bytes 71904040 (68.5 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

enp0s20u5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 00:0e:c6:c5:e6:6f txqueuelen 1000 (Ethernet)
RX packets 1072283 bytes 200438143 (191.1 MiB)
RX errors 0 dropped 114 overruns 0 frame 0
TX packets 317930 bytes 74447998 (70.9 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

enp3s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether d0:17:c2:8c:47:7d txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 196 bytes 29677 (28.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 196 bytes 29677 (28.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0