CentOS 7 设置网络IP地址

自动获得IP地址

1，CentOS 7自动获得一个IP地址

[root@aminglinux ~]# dhclient

2，查看网卡信息，会发现有一个ens33的网卡

[root@aminglinux ~]# ip addr

1: lo: 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: mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:0c:29:15:d9:1a brd ff:ff:ff:ff:ff:ff

inet 192.168.188.129/24 brd 192.168.188.255 scope global ens33

valid_lft forever preferred_lft forever

inet6 fe80::e3ea:d232:efe0:c71/64 scope link

valid_lft forever preferred_lft forever

手动设置网卡的IP地址

1，网卡的信息在/etc/sysconfig/network-scripts里面，你可以编辑下面的ifcfg-ens33的文件，来手动绑定IP地址

(红色的部分是需要修改和添加的内容)，修改完成后。按下ESC键，再输入“：wq"并回车保存退出。

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

TYPE=Ethernet

BOOTPROTO=static

DEFROUTE=yes

PEERDNS=yes

PEERROUTES=yes

IPV4_FAILURE_FATAL=no

IPV6INIT=yes

IPV6_AUTOCONF=yes

IPV6_DEFROUTE=yes

IPV6_PEERDNS=yes

IPV6_PEERROUTES=yes

IPV6_FAILURE_FATAL=no

IPV6_ADDR_GEN_MODE=stable-privacy

NAME=ens33

UUID=a69273cd-4aab-4cb7-8a24-8a100dd6c011

DEVICE=ens33

ONBOOT=yes

IPADDR=192.168.188.129

NETMASK=255.255.255.0

GATEWAY=192.168.188.2

DNS1=119.29.29.29

2，重启系统的网络服务，再查看下IP地址

[root@aminglinux ~]# systemctl restart network.service

[root@aminglinux ~]# ip addr

1: lo: 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: mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:0c:29:15:d9:1a brd ff:ff:ff:ff:ff:ff

inet 192.168.188.129/24 brd 192.168.188.255 scope global ens33

valid_lft forever preferred_lft forever

inet6 fe80::e3ea:d232:efe0:c71/64 scope link

valid_lft forever preferred_lft forever

3，最后测试下网络的连通性。

[root@aminglinux ~]# ping -c 4

PING

(182.254.152.182) 56(84) bytes of data.

64 bytes from 182.254.152.182 (182.254.152.182): icmp_seq=1 ttl=128 time=13.3 ms

64 bytes from 182.254.152.182 (182.254.152.182): icmp_seq=2 ttl=128 time=12.9 ms

64 bytes from 182.254.152.182 (182.254.152.182): icmp_seq=3 ttl=128 time=13.7 ms

64 bytes from 182.254.152.182 (182.254.152.182): icmp_seq=4 ttl=128 time=12.8 ms

---

ping statistics ---

4 packets transmitted, 4 received, 0% packet loss, time 7410ms

rtt min/avg/max/mdev = 12.843/13.228/13.778/0.376 ms