问题描述
配置了Centos7的网络配置文件,制定了一个IP:192.168.1.221,但是
[root@bogon bin]# ip add 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 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: enp24s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:d8:61:30:81:b3 brd ff:ff:ff:ff:ff:ff inet 192.168.1.100/24 brd 192.168.1.255 scope global noprefixroute dynamic enp24s0 valid_lft 49736sec preferred_lft 49736sec inet 192.168.1.221/24 brd 192.168.1.255 scope global secondary noprefixroute enp24s0 valid_lft forever preferred_lft forever inet6 fe80::a584:7c00:659a:80fd/64 scope link noprefixroute valid_lft forever preferred_lft forever
查看有多余的ip: inet 192.168.1.100/24
分析原因
百度一圈找到Centos配置多个IP的教程,但是反复看了几篇,翻阅到一篇提到配置静态IP,灵机一动,难道我们多的IP是DHCP指认出来的.后来查看配置文件,确实配置的是DHCP模式,修改为static就解决问题了.
修改历程
查找对应的配置文件
配置文件名后缀为可以查看刚才的ip add的显示两个ip(意外的ip100和配置过的ip221)的数字冒号后的内容,本例是2:后的内容内容,即enp24s0
enp24s0: <BROADCAST,MULTICAST,UP,LOWER_UP>....略...编辑配置文件
文件路径为:/etc/sysconfig/network-scripts/
文件前缀一般为:ifcfg-
vi /etc/sysconfig/network-scripts/ifcfg-enp24s0找到下面这个key值BOOTPROTO,把value dhcp修改为static
#修改前 BOOTPROTO="dhcp"
#修改后 BOOTPROTO="static"重启网络
输入命令service network restart重启,看到OK
service network restart
Restarting network (via systemctl): 确认效果，再次 ip add查看可以看到只有我们只认的一个IP221了.
[root@bogon bin]# ip add 1: lo: 略 2: enp24s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:d8:61:30:81:b3 brd ff:ff:ff:ff:ff:ff inet 192.168.1.221/24 brd 192.168.1.255 scope global noprefixroute enp24s0 valid_lft forever preferred_lft forever inet6 fe80::a584:7c00:659a:80fd/64 scope link noprefixroute valid_lft forever preferred_lft forever
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