[Oracle DataBase Server 12.1 installation on Oracle Linux 6.7]: Setup network interfaces

# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"
ONBOOT="yes"
BOOTPROTO="static"
IPADDR=192.168.1.11
NETMASK=255.255.255.0
GATEWAY=192.168.1.1

If you connect to server by RDP, i recommend to restart network service and connect to server by ssh.

# service network restart

Connect to server:

$ ssh [email protected]

Setup network parameters for server

# vi /etc/sysconfig/network

NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=oracle12serv.localdomain

# vi /etc/resolv.conf

nameserver 192.168.1.1

# vi /etc/hosts

## Localdomain and Localhost (hosts file, DNS)
127.0.0.1 localhost.localdomain localhost

## IPs Public Network (hosts file, DNS)
192.168.1.11 oracle12serv.localdomain oracle12serv

Check results:

# ping google.com