Ubuntu 16.04 配置单网卡绑定多IP

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Ubuntu 16.04 配置单网卡绑定多IP

操作系统

Ubuntu 16.04 LTS

一、单个网卡配置多个IP

  //在 /etc/network/ 目录下编辑 interfaces 文件

root@ubuntu:~# vim /etc/network/interfaces

# This file describes the network interfaces available on your system

# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface

auto lo

iface lo inet loopback

# The primary network interface

auto eth0                          //这台主机只有 eth0 这张网卡

iface eth0 inet static

        address 192.168.121.24

        netmask 255.255.255.0

        gateway 192.168.121.2

auto eth0:0                      //配置子ip eth0:0

iface eth0:0 inet static

        address 192.168.121.25

        netmask 255.255.255.0

auto eth0:1                      //配置子ip eth0:1

iface eth0:1 inet static

        address 192.168.121.26

        netmask 255.255.255.0

auto eth0:2                      //配置子ip eth0:2   ；接着可以依次类推

iface eth0:2 inet static

        address 192.168.121.27

        netmask 255.255.255.0

二、添加 DNS 配置

  //DNS服务需要在 /etc/resolvconf/resolv.conf.d/head

或者在/etc/resolvconf/resolv.conf.d/base  （二者任选其一）

方法一：

root@ubuntu:~# vim /etc/resolvconf/resolv.conf.d/head

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)

#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

nameserver 192.168.121.2            //添加这一行

  //保存退出后执行：resolvconf -u ；立即生效

root@ubuntu:~# resolvconf -u        //一定要执行这条命令，否则无效

方法二：

echo "nameserver x.x.x.x" >> /etc/resolvconf/resolv.conf.d/base

echo "nameserver x.x.x.x" >> /etc/resolvconf/resolv.conf.d/head     //任选其一；将 x.x.x.x 换成 DNS

resolvconf -u

三、重启网络服务

  //重启网络服务

root@ubuntu:~# systemctl restart networking.service

  //查看IP信息

root@ubuntu:~# ip add

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet6 ::1/128 scope host

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

    link/ether 00:0c:29:16:c5:69 brd ff:ff:ff:ff:ff:ff

    inet 192.168.121.24/24 brd 192.168.121.255 scope global eth0

       valid_lft forever preferred_lft forever

    inet 192.168.121.25/24 brd 192.168.121.255 scope global secondary eth0:0

       valid_lft forever preferred_lft forever

    inet 192.168.121.26/24 brd 192.168.121.255 scope global secondary eth0:1

       valid_lft forever preferred_lft forever

    inet 192.168.121.27/24 brd 192.168.121.255 scope global secondary eth0:2

       valid_lft forever preferred_lft forever

    inet6 fe80::20c:29ff:fe16:c569/64 scope link

       valid_lft forever preferred_lft forever