CentOS7.0 (Redhat 7.0) Static IP or DHCP setting

CentOS7.0 (Redhat 7.0) Static IP

• Using DHCP (/etc/sysconfig/network-scripts/ifcfg-enp0s3)

  DEVICE="enp0s3"
  ONBOOT=yes
  NETBOOT=yes
  IPV6INIT=yes
  BOOTPROTO=dhcp
  HWADDR="00:00:00:aa:aa:aa"
  TYPE=Ethernet
  NAME="enp0s3"
  DNS1="8.8.8.8"
  DNS2="8.8.4.4"
  

• Static IP setting (/etc/sysconfig/network-scripts/ifcfg-enp0s3)

  DEVICE="enp0s3"
  ONBOOT=yes
  NETBOOT=yes
  IPV6INIT=yes
  -BOOTPROTO=dhcp
  +BOOTPROTO=static
  HWADDR="00:00:00:aa:aa:aa"
  TYPE=Ethernet
  NAME="enp0s3"
  DNS1="8.8.8.8"
  DNS2="8.8.4.4"
  +IPADDR=192.168.100.11
  +NETMASK=255.255.255.0
  +GATEWAY=192.168.100.1
  

• DHCP using Network Manager

  nmcli c modify enp0s3 ipv4.method auto
  nmcli c modify enp0s3 ipv4.addresses ""
  nmcli c modify enp0s3 ipv4.dns ""
  nmcli c up enp0s3
  

• Stactic IP using Network Manager

  nmcli c modify enp0s3 ipv4.addresses "192.168.100.11/24 192.168.100.1"
  nmcli c modify enp0s3 +ipv4.dns 8.8.8.8
  nmcli c modify enp0s3 +ipv4.dns 8.8.4.4
  nmcli c modify enp0s3 ipv4.method manual
  nmcli c up enp0s3