Centos 7開啓網卡自動獲取IP的詳細方法

Centos7默認安裝是沒有開啓配置網卡信息的，無法訪問外網。

下邊配置打開網絡自動獲取Ip地址

1.查看網卡信息

執行Ifconfig  或 ip addr

eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

 

    inet6 fe80::20c:29ff:fee8:8637 prefixlen 64 scopeid 0x20<link>

 

    ether 00:0c:29:e8:86:37 txqueuelen 1000 (Ethernet)

 

    RX packets 1121 bytes 98968 (96.6 KiB)

 

    RX errors 0 dropped 0 overruns 0 frame 0

 

    TX packets 179 bytes 25233 (24.6 KiB)

 

    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

 

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536

 

    inet 127.0.0.1 netmask 255.0.0.0

 

    inet6 ::1 prefixlen 128 scopeid 0x10<host>

 

    loop txqueuelen 0 (Local Loopback)

 

    RX packets 900 bytes 78372 (76.5 KiB)

 

    RX errors 0 dropped 0 overruns 0 frame 0

 

    TX packets 900 bytes 78372 (76.5 KiB)

 

    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0




1. eno16777736代表網卡的名稱，ether 00:0c:29:e8:86:37代表網卡的Mac地址

2.配置網卡開始網絡連接

cd /etc/system/network-scripts/

 

vi ifcfg-eno16777736

HWADDR=00:0C:29:E8:86:37

TYPE=Ethernet

BOOTPROTO=dhcp

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

NAME=eno16777736

UUID=79d6c916-aab8-45e4-a163-37ae73393d26

ONBOOT=no

將ONBOOT= no改成ONBOOT=yes

3.重啓網絡

service network restart

4.再執行ifconfig

eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

    inet 192.168.159.128 netmask 255.255.255.0 broadcast 192.168.159.255

    inet6 fe80::20c:29ff:fee8:8637 prefixlen 64 scopeid 0x20<link>

    ether 00:0c:29:e8:86:37 txqueuelen 1000 (Ethernet)

    RX packets 1699 bytes 140091 (136.8 KiB)

    RX errors 0 dropped 0 overruns 0 frame 0

    TX packets 333 bytes 42669 (41.6 KiB)

    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

 

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536

    inet 127.0.0.1 netmask 255.0.0.0

    inet6 ::1 prefixlen 128 scopeid 0x10<host>

    loop txqueuelen 0 (Local Loopback)

    RX packets 900 bytes 78372 (76.5 KiB)

    RX errors 0 dropped 0 overruns 0 frame 0

    TX packets 900 bytes 78372 (76.5 KiB)

    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

inet 192.168.159.128 代表IP地址