Initial Seting CentOS 7 - Network Setting

Set static IP address to the server
Replace the interface name "eno16777736" for your own environment's one

# set hostname

[root@localhost ~]#

hostnamectl set-hostname dlp.server.world

# display devices

[root@localhost ~]#  nmcli d 

DEVICE       TYPE      STATE      CONNECTION
eno16777736  ethernet  connected  eno16777736
lo           loopback  unmanaged  --

# set IPv4 address ⇒ nmcli *** [IP address]

[root@localhost ~]#

nmcli c modify eno16777736 ipv4.addresses 10.0.0.30/24 

# set default gateway

[root@localhost ~]#

nmcli c modify eno16777736 ipv4.gateway 10.0.0.1 

# set DNS

[root@localhost ~]#

nmcli c modify eno16777736 ipv4.dns 10.0.0.1 

# set manual for static setting (it's "auto" for DHCP)

[root@localhost ~]#

nmcli c modify eno16777736 ipv4.method manual 

# restart the interface and reload the settings

[root@localhost ~]#

nmcli c down eno16777736; nmcli c up eno16777736 

Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/1)

# show settings

[root@localhost ~]#  nmcli d show eno16777736 

GENERAL.DEVICE:                 eno16777736
GENERAL.TYPE:                   ethernet
GENERAL.HWADDR:                 00:0C:29:CD:9C:2D
GENERAL.MTU:                    1500
GENERAL.STATE:                  100 (connected)
GENERAL.CONNECTION:             eno16777736
GENERAL.CON-PATH:               /org/freedesktop/NetworkManager/ActiveConnection/0
WIRED-PROPERTIES.CARRIER:       on
IP4.ADDRESS[1]:                 ip = 10.0.0.30/24, gw = 10.0.0.1
IP4.DNS[1]:                     10.0.0.1
IP6.ADDRESS[1]:                 ip = fe80::20c:29ff:fecd:9c2d/64, gw = ::

# show status

[root@localhost ~]#  ip addr show 

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    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: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:cd:9c:2d brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.30/24 brd 10.0.0.255 scope global eno16777736
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fecd:9c2d/64 scope link
       valid_lft forever preferred_lft forever

Disable IPv6 if you do not need it.

[root@localhost ~]#


vi /etc/default/grub



# line 6: add
GRUB_CMDLINE_LINUX="


ipv6.disable=1
 rd.lvm.lv=fedora-server/root.....

# apply changing
[root@localhost ~]# 

grub2-mkconfig -o /boot/grub2/grub.cfg 
[root@localhost ~]# 

reboot 

If you'd like to use the network interface name as ethX, configure like follows.

[root@dlp ~]#


vi /etc/default/grub



# line 6: add
GRUB_CMDLINE_LINUX="


net.ifnames=0
 rd.lvm.lv=fedora/swap rd.md=0.....

# apply changing
[root@dlp ~]# 

grub2-mkconfig -o /boot/grub2/grub.cfg 
[root@dlp ~]# 

reboot