If you want to set up a static IP address on a network interface in RHEL/CentOS 7, see the below steps to setup static IP in ur Server.
Step1: To verify the status of Network Manager service
[root@bsrtech ~]# systemctl status NetworkManager.service
output of nmcli shows "connected" for a particular interface, it means that the interface is managed by Network Manager.
Step2: To check which network interface is managed by Network Manager
[root@bsrtech ~]# nmcli dev status
Step3 : Assign Static IP Address
Go to the "/etc/sysconfig/network-scripts" directory, then open configuration file "ifcfg-enp0s3" (in CentOS "ifcfg-ens192").Create it if not found.
[root@bsrtech ~]# cd /etc/sysconfig/network-scripts/
[root@bsrtech ~]# vim ifcfg-enp0s3
In the above file
"BOOTPROTO=static" means assign ip through manually.
"ONBOOT=yes" means system to bring up the interface during boot.
Step4: Save the changes and restart the network services using below command
[root@bsrtech ~]# systemctl restart network.service
Chech the IP address is assigned or not
[root@bsrtech ~]# ip a
(or)
[root@bsrtech ~]# ifconfig
If you want to assign static IP with Network Manager, see below steps
Before using nmtui, first set "NM_CONTROLLED=yes" in /etc/sysconfig/network-scripts/ifcfg-enp0s3.
Step1: Install nmtui package using rpm or yum
[root@bsrtech ~]# yum install NetworkManager-tui
Step2: Edit the configuration file using nmtui command
[root@bsrtech ~]# nmtui edit enp0s3
Step3: Now restart the network service and see the Static IP
[root@bsrtech ~]# systemctl restart network.service
Chech the IP address is assigned or not
[root@bsrtech ~]# ifconfig
Related post:
Assign virtual IPs to a single network interface in RHEL/CentOS 7.X
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