1 确认内核是否有tun模块

modinfo tun

modprobe tun
lsmod | grep tun

2 安装tunctl软件

yum install tunctl -y

vim /etc/yum.repos.d/nux-misc.repo

[nux-misc]
name=Nux Misc
baseurl=http://li.nux.ro/download/nux/misc/el7/x86_64/
enabled=0
gpgcheck=1
gpgkey=http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro

yum --enablerepo=nux-misc install tunctl

软件名称：tunctl-1.5-12.el7.nux.x86_64

3 添加多个ip并绑定到网卡  

cd /etc/sysconfig/network-scripts
cp ifcfg-lo ifcfg-lo:1 
vim ifcfg-lo:1 

DEVICE=lo:1 
ONBOOT=yes 
BOOTPROTO=static 
IPADDR=新增IP 
NETMASK=子网掩码 
GATEWAY=网关地址 

systemctl restart network

4 批量添加虚拟网卡

tunctl -t tap0 -u root  

tap0 是虚拟网卡名字

ifconfig tap0 172.168.1.1 netmask 255.255.255.0 promisc

172.168.1.1 是ip地址

ip tuntap add tap1 mode tun

tunctl -t tap0 -u root                     
ifconfig tap0 172.168.1.1 netmask 255.255.255.0 promisc
ip tuntap add tap1 mode tap
ifconfig tap1 10.0.0.1/16
ip tuntap add tap2 mode tap
ifconfig tap2 10.0.0.1/17
ip tuntap add tap3 mode tap
ifconfig tap3 10.0.0.1/18
ip tuntap add tap4 mode tap
ifconfig tap4 10.0.0.1/19
ip tuntap add tap5 mode tap
ifconfig tap5 10.0.0.1/20
ip tuntap add tap6 mode tap
ifconfig tap6 10.0.0.1/21
ip tuntap add tap7 mode tap
ifconfig tap7 10.0.0.1/22
ip tuntap add tap8 mode tap
ifconfig tap8 10.0.0.1/23
ip tuntap add tap9 mode tap
ifconfig tap9 10.0.0.1/24

sh addVirnet.sh 

#!/bin/bash
#
i=0
n=0
while [ $n -le 10 ];do
i=$(( $i + $n ))
n=$(( $n + 1 ))
ip tuntap add tap$n mode tap
done
echo $i 

5 批量修改虚拟网卡

ifconfig tap0 192.168.130.17  netmask 255.255.255.0 promisc 
ifconfig tap1 192.168.130.18  netmask 255.255.255.0 promisc 
ifconfig tap2 192.168.130.19  netmask 255.255.255.0 promisc 
ifconfig tap3 192.168.130.20  netmask 255.255.255.0 promisc 
ifconfig tap4 192.168.130.21  netmask 255.255.255.0 promisc 
ifconfig tap5 192.168.130.23  netmask 255.255.255.0 promisc 
ifconfig tap6 192.168.130.24  netmask 255.255.255.0 promisc
ifconfig tap7 192.168.130.25  netmask 255.255.255.0 promisc 
ifconfig tap8 192.168.130.28  netmask 255.255.255.0 promisc 
ifconfig tap9 192.168.130.30  netmask 255.255.255.0 promisc

6 批量删除虚拟网卡

tunctl -d tap0
tunctl -d tap1
tunctl -d tap2
tunctl -d tap3
tunctl -d tap4
tunctl -d tap5
tunctl -d tap6
tunctl -d tap7
tunctl -d tap8
tunctl -d tap9

sh deleteVirnet.sh

#!/bin/bash
#
i=0
n=0
while [ $n -le 10 ];do
i=$(( $i + $n ))
n=$(( $n + 1 ))
tunctl -d tap$n
done
echo $i 

其他命令

tunctl
brctl show

brctl addbr br-zhai
brctl addif br-zhai tap0
brctl addif br-zhai tap1
ifconfig -a
brctl show
ifconfig br-zhai 192.168.9.1 up
ifconfig br-zhai
ifconfig -a
brctl show
brctl showmacs br-zhai
ifconfig tap0 promisc
ifconfig

开启自动启动虚拟网卡脚本 

vim /etc/init.d/config_tap 

  #!/bin/bash
  #
  # config_tap          Start up the tun/tap virtual nic
  #
  # chkconfig: 2345 55 25
  USER="root"
  TAP_NETWORK="192.168.130.10"
  TAP_DEV_NUM=0
  DESC="TAP config"
  do_start() {
    if [ ! -x /usr/sbin/tunctl ]; then
      echo "/usr/sbin/tunctl was NOT found!"
      exit 1
    fi
    tunctl -t tap$TAP_DEV_NUM -u root
    ifconfig tap$TAP_DEV_NUM ${TAP_NETWORK}  netmask 255.255.255.0 promisc
    ifconfig tap$TAP_DEV_NUM
  }
  do_stop() {
    ifconfig tap$TAP_DEV_NUM down 
  }
  do_restart() {
    do_stop
    do_start
  }
  check_status() {
    ifconfig tap$TAP_DEV_NUM 
  }
  case $1 in 
    start)    do_start;;
    stop)     do_stop;;
    restart)  do_restart;;
    status)
              echo "Status of $DESC: "
              check_status
              exit "$?"
              ;;
    *)
      echo "Usage: $0 {start|stop|restart|status}"
      exit 1 
  esac
n=0
while [ $n -le 8 ];do
n=$(( $n + 1 ))
ip tuntap add tap$n mode tap
done
echo $i 
ifconfig tap0 192.168.1.110  netmask 255.255.255.0 promisc 
ifconfig tap1 192.168.1.111  netmask 255.255.255.0 promisc 
ifconfig tap2 192.168.1.112  netmask 255.255.255.0 promisc 
ifconfig tap3 192.168.1.113  netmask 255.255.255.0 promisc 
ifconfig tap4 192.168.1.114  netmask 255.255.255.0 promisc 
ifconfig tap5 192.168.1.115  netmask 255.255.255.0 promisc 
ifconfig tap6 192.168.1.116  netmask 255.255.255.0 promisc 
ifconfig tap7 192.168.1.117  netmask 255.255.255.0 promisc 
ifconfig tap8 192.168.1.118  netmask 255.255.255.0 promisc 
ifconfig tap9 192.168.1.119  netmask 255.255.255.0 promisc 

chkconfig --add config_tap 
chkconfig --level 345 config_tap on
service config_tap start