固定静态ip:

vi /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
IPADDR=10.99.0.11
NETMASK=255.255.0.0
IPV6INIT=no
MTU=1450
ZONE=public

重启下网卡:  systemctl restart network.service

或:

ifdown eth1

ifup eth1

动态分配ip:

TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="dhcp"
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="ens33"
UUID="1c5fcf9e-62b1-459a-8d78-4a026c0b1a1e"
DEVICE="ens33"
ONBOOT="yes"