Centos network

Interface

Config

• /etc/sysconfig/network-scripts/ifcfg-eth0

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
UUID=0a71043a-ff10-43ea-b795-be0b3e987781
DEVICE=eth0
ONBOOT=yes
IPADDR=10.84.252.40
NETMASK=255.255.255.0
GATEWAY=10.84.252.1
DNS1=10.84.252.1
ZONE=public

Handling

up

• ifup eth0

down

• ifdown eth0

ifdown eth0

Routing

static

• /etc/sysconfig/network-scripts/route-ens9

10.81.0.0/16 via 10.83.40.254 dev ens9
10.82.0.0/16 via 10.83.40.254 dev ens9

Bridge

Install bridge utils

• yum install -y bridge-utils

Config

• /etc/sysconfig/network-scripts/ifcfg-lan

DEVICE="lan"
BOOTPROTO="static"
IPADDR="192.168.12.10"
NETMASK="255.255.255.0"
GATEWAY="192.168.12.2"
DNS1=192.168.12.2
ONBOOT="yes"
TYPE="Bridge"
NM_CONTROLLED="no"

• http://www.itzgeek.com/how-tos/mini-howtos/create-a-network-bridge-on-centos-7-rhel-7.html