查看ip：  ens33下的192.168.189.144

[root@localhost ~]# ip  a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:f5:db:84 brd ff:ff:ff:ff:ff:ff
    inet 192.168.189.144/24 brd 192.168.189.255 scope global dynamic ens33
       valid_lft 1231sec preferred_lft 1231sec
    inet6 fe80::3ab4:fa58:3962:e574/64 scope link 
       valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 52:54:00:0b:bf:64 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
    link/ether 52:54:00:0b:bf:64 brd ff:ff:ff:ff:ff:ff
[root@localhost ~]# 

解决方案：通过编辑配置文件/etc/sysconfig/network-scripts/ifcfg-ens33
固定ip地址

[root@localhost ~]#vim  /etc/sysconfig/network-scripts/ifcfg-ens33

在配置中做一下修改：

##将BOOTPORTO=dhcp改为BOOTPORTO=static
原本是自动获取ip,现在改成固定ip
 
ONBOOT=yes
这个是no的话就改为yes,表示自动启用网卡

添加：

IPADDR=192.168.242.100
NETMASK=255.255.255.0
GATEWAY=192.168.242.100

如下结果图：

 重启配置：

[root@localhost ~]# service network restart 

查看最终效果：

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[root@localhost ~]# ifconfig