RHEL7.0 Network IP Configuration Guide: Detailed explanation of three configuration methods

The naming method of the network card in RHEL7 has changed from eth0,1,2 to the enoXXXXX format. en stands for enthernet (Ethernet), and o stands for onboard (built-in). That string of numbers is automatically generated by some index number of the motherboard to ensure its uniqueness. Compared with the original naming method, this new method is relatively long and difficult to remember. However, the advantage is that the number is unique and it is not easy to make mistakes when doing system migration.

1. Modify /etc/sysconfig/network-scripts/eno16777736

Check your network card name (this machine is eno16777736):

[root@linuxprobe Desktop]# ifconfig

eno16777736: flags=4163 mtu 1500

inet 192.168.1.100 netmask 255.255.255.0 broadcast 192.168.1.255

inet6 fe80::20c:29ff:feb8:2b07 prefixlen 64 scopeid 0x20

inet6 fde0:b912:e3a9:0:20c:29ff:feb8:2b07 prefixlen 64 scopeid 0x0

ether 00:0c:29:b8:2b:07 txqueuelen 1000 (Ethernet)

RX packets 37 bytes 5428 (5.3 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 62 bytes 8269 (8.0 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73 mtu 65536

inet 127.0.0.1 netmask 255.0.0.0

inet6 ::1 prefixlen 128 scopeid 0x10

loop txqueuelen 0 (Local Loopback)

RX packets 134 bytes 10928 (10.6 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 134 bytes 10928 (10.6 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

[root@linuxprobe Desktop]

#Edit ifcfg-eno16777736 file:

Red indicates content that needs to be modified or added, save and exit.

Partial explanation:

TYPE=Ethernet #Network interface type

BOOTPROTO=static #Dynamic is dhcp

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=yes #Whether IPV6 is supported

IPV6_AUTOCONF=yes

IPV6_DEFROUTE=yes

IPV6_FAILURE_FATAL=no

NAME=eno16777736 #NIC name

UUID=72cf53fd-534c-4765-912b-3df575a10a7d

ONBOOT=yes #Turn on automatic network connection

IPADDRO=192.168.1.20 #Set IP address

GATEWAY0=192.168.1.1 #Set gateway

PREFIX0=24 #Set subnet mask

DNS1=192.168.1.1 #Set DNS

HWADDR=00:0C:29:B8:2B:07

PEERDNS=yes

PEERROUTES=yes

IPV6_PEERDNS=yes

IPV6_PEERROUTES=yes

Restart the network card and test the network:

[root@linuxprobe Desktop]# systemctl restart network

2. Graphical tool nmtui

Execute the command in the terminal:

[root@linuxprobe Desktop]# nmtui

You still need to restart the network card to take effect and test the network.

3. Graphical tool nm-connection-editor

Terminal execution command:

[root@linuxprobe Desktop]# nm-connection-editor

As long as you know one of the three methods

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