一、方式一

1.修改/etc/sysconfig/network-scripts/ifcfg-enp2s0 为:(注意:文件名一定要为网卡设备名)

1. DEVICE=enp2s0
2. BOOTPROTO=static
3. ONBOOT=yes
4. DNS1=10.0.10.10
5. DNS2=8.8.8.8
6. HWADDR=B8:88:E3:73:7A:7B
7. IPADDR=10.0.57.114
8. PREFIX=24
9. GATEWAY=10.0.57.1

2.cp ifcfg-enp2s0 为 ifcfg-enp2s0:1,并修该ifcfg-enp2s0:1 内容为:

1. DEVICE=enp2s0:1
2. BOOTPROTO=static
3. ONBOOT=yes
4. DNS1=10.0.10.10
5. DNS2=8.8.8.8
6. HWADDR=B8:88:E3:73:7A:7B
7. IPADDR=10.0.57.115
8. PREFIX=24
9. GATEWAY=10.0.57.1

3.重启网卡，然后ifconfig就可以看到。‍

二、方式二

1.直接配置多个网卡在/etc/sysconfig/network-scripts/ifcfg-enp2s0 里, 

    不过要用ip addr才能看到多个ip信息，配置如下：

1. TYPE=Ethernet
2. BOOTPROTO=none
3. DEFROUTE=yes
4. IPV4_FAILURE_FATAL=no
5. IPV6INIT=yes
6. IPV6_AUTOCONF=yes
7. IPV6_DEFROUTE=yes
8. IPV6_FAILURE_FATAL=no
9. NAME=za209
10. UUID=7e917b8e-2d35-4630-b314-2d64a2f1f52f
11. ONBOOT=no
12. DNS1=10.0.10.10
13. DOMAIN=10.0.15.11
14. HWADDR=B8:88:E3:73:7A:7B
15. IPADDR=10.0.57.230
16. PREFIX=24
17. GATEWAY=10.0.57.1
18. IPADDR1=10.0.57.231
19. PREFIX1=24
20. GATEWAY1=10.0.57.1
21. IPV6_PEERDNS=yes
22. IPV6_PEERROUTES=yes

      

     2.重启网卡，用ip addr命令查看，显示如下：

1.     2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
2.     link/ether b8:88:e3:73:7a:7b brd ff:ff:ff:ff:ff:ff
3.     inet 10.0.57.230/24 brd 10.0.57.255 scope global enp2s0
4.        valid_lft forever preferred_lft forever
5.     inet 10.0.57.231/24 brd 10.0.57.255 scope global secondary enp2s0
6.        valid_lft forever preferred_lft forever
7.     inet6 fe80::ba88:e3ff:fe73:7a7b/64 scope link
8.        valid_lft forever preferred_lft forever